Alert archive / Colorado / Wind Chill Advisories in 2016

Wind Chill Advisory 2, NWS Denver/Boulder, CO

December 16, 201614 counties in Colorado

NWS Denver/Boulder, CO issued this wind chill advisory at Dec 16, 2016, 12:58 PM MST for 14 counties in Colorado. It took effect at Dec 17, 2016, 12:00 AM MST. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued
Dec 16, 2016, 12:58 PM MST (19:58 UTC)
In effect from
Dec 17, 2016, 12:00 AM MST
Expired
Dec 17, 2016, 12:00 PM MST
In force
12 hr
Issued by
NWS Denver/Boulder, CO

Counties Adams County, CO, Arapahoe County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Larimer County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO

The radar

The Denver radar (KFTG), 55 km from the middle of the area, began a volume at 19:59 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 8.0 hours before the alert went out and 67 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2016-12-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2016-12-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2396 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
150 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

708 
WWUS45 KBOU 161958
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1258 PM MST FRI DEC 16 2016

...HEAVIEST SNOW EXPECTED TONIGHT OVER NORTHERN COLORADO 
MOUNTAINS...

.THE HEAVIEST SNOW IS EXPECTED TONIGHT OVER THE MOUNTAINS AS THE
UPPER DISTURBANCE MOVES ACROSS COLORADO.  STRONG WESTERLY WINDS 
OVER THE HIGH PASSES AND UP AROUND THE EISENHOWER TUNNEL WILL 
COMBINE WITH THE HEAVY SNOWFALL TO PRODUCE HAZARDOUS AND VERY 
DIFFICULT WINTER DRIVING CONDITIONS. POOR VISIBILITIES AND SNOW 
COVERED ROADS MAY RESULT IN VERY SLOW TRAFFIC AND POSSIBLE ROAD 
CLOSURES. SNOWFALL IS EXPECTED TO DECREASE LATE TONIGHT...WITH 
LIGHTER SNOWFALL RATES INTO SATURDAY MORNING.

PEOPLE PLANNING TRAVEL INTO THE COLORADO HIGH COUNTRY THROUGH
SATURDAY MORNING SHOULD BE PREPARED FOR ADVERSE AND VERY
DIFFICULT TRAVEL CONDITIONS.

COZ031-170400-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
INCLUDING THE CITIES OF EAST SLOPES PARK AND NORTHERN GORE
RANGES, GORE PASS, AND RABBIT EARS PASS
1258 PM MST FRI DEC 16 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
SATURDAY...

* TIMING...SNOWFALL WILL INCREASE AGAIN THIS EVENING AND CONTINUE
  INTO SATURDAY MORNING. THE HEAVIEST SNOWFALL WILL OCCUR THIS
  EVENING.  

* SNOW ACCUMULATIONS...FROM 12 TO 24 INCHES....HEAVIEST ABOVE 
  TIMBERLINE AND WEST FACING SLOPES. 

* WIND/VISIBILITY...WEST TO SOUTHWEST WINDS OF 25 TO 45 MPH WILL 
  PRODUCE AREAS OF BLOWING AND DRIFTING SNOW. VISIBILITIES MAY 
  FALL BELOW A FEW HUNDRED FEET AT TIMES DUE TO HEAVY SNOW AND 
  BLOWING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND 
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS TODAY 
  THROUGH SATURDAY MORNING...ESPECIALLY OVER THE PASSES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL
MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

COZ033-034-170400-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/
GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE
9000 FEET-
INCLUDING THE CITIES OF CAMERON PASS, 
LARAMIE AND MEDICINE BOW MOUNTAINS, RABBIT EARS RANGE, 
ROCKY MOUNTAIN NATIONAL PARK, WILLOW CREEK PASS, BERTHOUD PASS, 
BRECKENRIDGE, EAST SLOPES MOSQUITO RANGE, 
EAST SLOPES SOUTHERN GORE RANGE, EISENHOWER TUNNEL, INDIAN PEAKS,
KENOSHA MOUNTAINS, MOUNT EVANS, WILLIAMS FORK MOUNTAINS, 
AND WINTER PARK
1258 PM MST FRI DEC 16 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
SATURDAY...

* TIMING...SNOWFALL WILL INCREASE IN INTENSITY THIS EVENING AND
  CONTINUE INTO SATURDAY MORNING. SNOW WILL BE HEAVY AT TIMES THIS TONIGHT.

* SNOW ACCUMULATIONS...8 TO 16 INCHES.

* WIND/VISIBILITY...WEST TO SOUTHWEST WINDS OF 20 TO 35 MPH WITH 
  GUSTS AROUND 50 MPH WILL PRODUCE BLOWING SNOW OVER THE HIGHER 
  PASSES AND RIDGES THROUGH FRIDAY NIGHT. VISIBILITIES MAY FALL 
  BELOW A FEW HUNDRED FEET AT TIMES IN HEAVY SNOWFALL AND 
  BLOWING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND 
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS TODAY 
  THROUGH SATURDAY MORNING. TRAVEL RESTRICTIONS AND ROAD 
  CLOSURES ARE HIGHLY POSSIBLE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS AND BLOWING SNOW ARE LIKELY...
.WHICH WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

COZ042-044>046-048>051-170400-
/O.NEW.KBOU.WC.Y.0002.161217T0700Z-161217T1900Z/
NORTHEAST WELD COUNTY-MORGAN COUNTY-
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-
PHILLIPS COUNTY-
INCLUDING THE CITIES OF BRIGGSDALE, GROVER, PAWNEE BUTTES, 
RAYMER, STONEHAM, BRUSH, FORT MORGAN, GOODRICH, WIGGINS, BENNETT,
BYERS, DEER TRAIL, LEADER, AGATE, HUGO, LIMON, MATHESON, CROOK, 
MERINO, STERLING, PEETZ, AKRON, COPE, LAST CHANCE, OTIS, 
JULESBURG, OVID, SEDGWICK, AMHERST, HAXTUN, AND HOLYOKE
1258 PM MST FRI DEC 16 2016

...WIND CHILL ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO NOON
MST SATURDAY...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WIND CHILL
ADVISORY, WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO NOON MST
SATURDAY. 

* WIND CHILL VALUES...15 TO 25 BELOW ZERO. 

* IMPACTS...THE COLD TEMPERATURES AND WINDS WILL PRODUCE DANGEROUS
  WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA CONDITIONS
  WITH EXPOSED SKINFROM 2 TO 6 INCHES OF SNOW FELL OVERNIGHT IN
  THE MOUNTAINS AROUND STEAMBOAT SPRINGS WITH EVEN HEAVIER SNOW IN
  THE MOUNTAINS WEST OF ASPEN.FROM 2 TO 6 INCHES OF SNOW FELL
  OVERNIGHT IN THE MOUNTAINS AROUND STEAMBOAT SPRINGS WITH EVEN
  HEAVIER SNOW IN THE MOUNTAINS WEST OF ASPEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. 
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

&&

$$
8 follow-up statements
676 
WWUS45 KBOU 162027
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
127 PM MST FRI DEC 16 2016

...HEAVIEST SNOW EXPECTED TONIGHT OVER NORTHERN COLORADO
MOUNTAINS...

.THE HEAVIEST SNOW IS EXPECTED TONIGHT OVER THE MOUNTAINS AS THE
UPPER DISTURBANCE MOVES ACROSS COLORADO.  STRONG WESTERLY WINDS
OVER THE HIGH PASSES AND UP AROUND THE EISENHOWER TUNNEL WILL
COMBINE WITH THE HEAVY SNOWFALL TO PRODUCE HAZARDOUS AND VERY
DIFFICULT WINTER DRIVING CONDITIONS. POOR VISIBILITIES AND SNOW
COVERED ROADS MAY RESULT IN VERY SLOW TRAFFIC AND POSSIBLE ROAD
CLOSURES. SNOWFALL IS EXPECTED TO DECREASE LATE TONIGHT...WITH
LIGHTER SNOWFALL RATES INTO SATURDAY MORNING.

PEOPLE PLANNING TRAVEL INTO THE COLORADO HIGH COUNTRY THROUGH
SATURDAY MORNING SHOULD BE PREPARED FOR ADVERSE AND VERY
DIFFICULT TRAVEL CONDITIONS.

COZ031-170430-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
INCLUDING THE CITIES OF EAST SLOPES PARK AND NORTHERN GORE
RANGES, GORE PASS, AND RABBIT EARS PASS
127 PM MST FRI DEC 16 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
SATURDAY...

* TIMING...SNOWFALL WILL INCREASE AGAIN THIS EVENING AND 
  CONTINUE INTO SATURDAY MORNING. THE HEAVIEST SNOWFALL WILL 
  OCCUR THIS EVENING. 

* SNOW ACCUMULATIONS...FROM 12 TO 24 INCHES....HEAVIEST ABOVE 
  TIMBERLINE AND WEST FACING SLOPES. 

* WIND/VISIBILITY...WEST TO SOUTHWEST WINDS OF 25 TO 45 MPH WILL 
  PRODUCE AREAS OF BLOWING AND DRIFTING SNOW. VISIBILITIES MAY 
  FALL BELOW A FEW HUNDRED FEET AT TIMES DUE TO HEAVY SNOW AND 
  BLOWING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND 
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS TODAY 
  THROUGH SATURDAY MORNING...ESPECIALLY OVER THE PASSES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL
MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

COZ033-034-170430-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/
GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE
9000 FEET-
INCLUDING THE CITIES OF CAMERON PASS, 
LARAMIE AND MEDICINE BOW MOUNTAINS, RABBIT EARS RANGE, 
ROCKY MOUNTAIN NATIONAL PARK, WILLOW CREEK PASS, BERTHOUD PASS, 
BRECKENRIDGE, EAST SLOPES MOSQUITO RANGE, 
EAST SLOPES SOUTHERN GORE RANGE, EISENHOWER TUNNEL, INDIAN PEAKS,
KENOSHA MOUNTAINS, MOUNT EVANS, WILLIAMS FORK MOUNTAINS, 
AND WINTER PARK
127 PM MST FRI DEC 16 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
SATURDAY...

* TIMING...SNOWFALL WILL INCREASE IN INTENSITY THIS EVENING AND 
  CONTINUE INTO SATURDAY MORNING. SNOW WILL BE HEAVY AT TIMES 
  THIS TONIGHT. 

* SNOW ACCUMULATIONS...8 TO 16 INCHES.

* WIND/VISIBILITY...WEST TO SOUTHWEST WINDS OF 20 TO 35 MPH WITH 
  GUSTS AROUND 50 MPH WILL PRODUCE BLOWING SNOW OVER THE HIGHER 
  PASSES AND RIDGES THROUGH FRIDAY NIGHT. VISIBILITIES MAY FALL 
  BELOW A FEW HUNDRED FEET AT TIMES IN HEAVY SNOWFALL AND 
  BLOWING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND 
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS TODAY 
  THROUGH SATURDAY MORNING. TRAVEL RESTRICTIONS AND ROAD 
  CLOSURES ARE HIGHLY POSSIBLE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS AND BLOWING SNOW ARE LIKELY...
.WHICH WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

COZ042-044>046-048>051-170430-
/O.CON.KBOU.WC.Y.0002.161217T0700Z-161217T1900Z/
NORTHEAST WELD COUNTY-MORGAN COUNTY-
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-
PHILLIPS COUNTY-
INCLUDING THE CITIES OF BRIGGSDALE, GROVER, PAWNEE BUTTES, 
RAYMER, STONEHAM, BRUSH, FORT MORGAN, GOODRICH, WIGGINS, BENNETT,
BYERS, DEER TRAIL, LEADER, AGATE, HUGO, LIMON, MATHESON, CROOK, 
MERINO, STERLING, PEETZ, AKRON, COPE, LAST CHANCE, OTIS, 
JULESBURG, OVID, SEDGWICK, AMHERST, HAXTUN, AND HOLYOKE
127 PM MST FRI DEC 16 2016

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
NOON MST SATURDAY...

* WIND CHILL VALUES...15 TO 25 BELOW ZERO.

* IMPACTS...THE COLD TEMPERATURES AND WINDS WILL PRODUCE DANGEROUS
  WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA CONDITIONS
  WITH EXPOSED SKIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN.
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

&&

$$
399 
WWUS45 KBOU 170057
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
557 PM MST FRI DEC 16 2016

...HEAVIEST SNOW EXPECTED TONIGHT OVER NORTHERN COLORADO
MOUNTAINS...

.THE HEAVIEST SNOW IS EXPECTED TONIGHT OVER THE MOUNTAINS AS THE
UPPER DISTURBANCE MOVES ACROSS COLORADO.  STRONG WESTERLY WINDS
OVER THE HIGH PASSES AND UP AROUND THE EISENHOWER TUNNEL WILL
COMBINE WITH THE HEAVY SNOWFALL TO PRODUCE HAZARDOUS AND VERY
DIFFICULT WINTER DRIVING CONDITIONS. POOR VISIBILITIES AND SNOW
COVERED ROADS MAY RESULT IN VERY SLOW TRAFFIC AND POSSIBLE ROAD
CLOSURES. SNOWFALL IS EXPECTED TO DECREASE LATE TONIGHT...WITH
LIGHTER SNOWFALL RATES INTO SATURDAY MORNING.

PEOPLE PLANNING TRAVEL INTO THE COLORADO HIGH COUNTRY THROUGH
SATURDAY MORNING SHOULD BE PREPARED FOR ADVERSE AND VERY
DIFFICULT TRAVEL CONDITIONS.

COZ042-044>046-048>051-170900-
/O.NEW.KBOU.WC.W.0001.161217T1200Z-161217T1900Z/
/O.EXT.KBOU.WC.Y.0002.161217T0700Z-161217T1200Z/
NORTHEAST WELD COUNTY-MORGAN COUNTY-
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-
PHILLIPS COUNTY-
INCLUDING THE CITIES OF BRIGGSDALE, GROVER, PAWNEE BUTTES, 
RAYMER, STONEHAM, BRUSH, FORT MORGAN, GOODRICH, WIGGINS, BENNETT,
BYERS, DEER TRAIL, LEADER, AGATE, HUGO, LIMON, MATHESON, CROOK, 
MERINO, STERLING, PEETZ, AKRON, COPE, LAST CHANCE, OTIS, 
JULESBURG, OVID, SEDGWICK, AMHERST, HAXTUN, AND HOLYOKE
557 PM MST FRI DEC 16 2016

...WIND CHILL ADVISORY NOW IN EFFECT FROM MIDNIGHT TONIGHT TO
5 AM MST SATURDAY...A WIND CHILL WARNING WILL TAKES ITS PLACE AND
BE IN EFFECT FROM 5 AM TO NOON MST SATURDAY ON THE EASTERN PLAINS...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WIND CHILL
WARNING, WHICH IS IN EFFECT FROM 5 AM TO NOON MST SATURDAY. 

* WIND CHILL VALUES FOR THE ADVISORY WILL RANGE FROM 15 TO 25
  BELOW ZERO. WIND CHILL VALUES WILL DROP BELOW 25 DEGREES BELOW 
  ZERO FROM 5 AM UNTIL NOON SATURDAY.

* IMPACTS...THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND 
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS 
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF 
PRECAUTIONS ARE NOT TAKEN.

&&

$$

COZ031-170900-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
INCLUDING THE CITIES OF EAST SLOPES PARK AND NORTHERN GORE
RANGES, GORE PASS, AND RABBIT EARS PASS
557 PM MST FRI DEC 16 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
SATURDAY...

* TIMING...SNOWFALL WILL INCREASE AGAIN THIS EVENING AND 
  CONTINUE INTO SATURDAY MORNING. THE HEAVIEST SNOWFALL WILL 
  OCCUR THIS EVENING. 

* SNOW ACCUMULATIONS...FROM 12 TO 24 INCHES....HEAVIEST ABOVE 
  TIMBERLINE AND WEST FACING SLOPES. 

* WIND/VISIBILITY...WEST TO SOUTHWEST WINDS OF 25 TO 45 MPH WILL 
  PRODUCE AREAS OF BLOWING AND DRIFTING SNOW. VISIBILITIES MAY 
  FALL BELOW A FEW HUNDRED FEET AT TIMES DUE TO HEAVY SNOW AND 
  BLOWING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND 
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS TODAY 
  THROUGH SATURDAY MORNING...ESPECIALLY OVER THE PASSES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL
MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

COZ033-034-170900-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/
GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE
9000 FEET-
INCLUDING THE CITIES OF CAMERON PASS, 
LARAMIE AND MEDICINE BOW MOUNTAINS, RABBIT EARS RANGE, 
ROCKY MOUNTAIN NATIONAL PARK, WILLOW CREEK PASS, BERTHOUD PASS, 
BRECKENRIDGE, EAST SLOPES MOSQUITO RANGE, 
EAST SLOPES SOUTHERN GORE RANGE, EISENHOWER TUNNEL, INDIAN PEAKS,
KENOSHA MOUNTAINS, MOUNT EVANS, WILLIAMS FORK MOUNTAINS, 
AND WINTER PARK
557 PM MST FRI DEC 16 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
SATURDAY...

* TIMING...SNOWFALL WILL INCREASE IN INTENSITY THIS EVENING AND 
  CONTINUE INTO SATURDAY MORNING. SNOW WILL BE HEAVY AT TIMES 
  THIS TONIGHT. 

* SNOW ACCUMULATIONS...8 TO 16 INCHES.

* WIND/VISIBILITY...WEST TO SOUTHWEST WINDS OF 20 TO 35 MPH WITH 
  GUSTS AROUND 50 MPH WILL PRODUCE BLOWING SNOW OVER THE HIGHER 
  PASSES AND RIDGES THROUGH FRIDAY NIGHT. VISIBILITIES MAY FALL 
  BELOW A FEW HUNDRED FEET AT TIMES IN HEAVY SNOWFALL AND 
  BLOWING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND 
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS TODAY 
  THROUGH SATURDAY MORNING. TRAVEL RESTRICTIONS AND ROAD 
  CLOSURES ARE HIGHLY POSSIBLE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS AND BLOWING SNOW ARE LIKELY...
.WHICH WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

COZ038-040-041-043-170900-
/O.EXB.KBOU.WC.Y.0002.161217T1200Z-161217T1900Z/
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND
ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-
ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-
CENTRAL AND SOUTH WELD COUNTY-
INCLUDING THE CITIES OF FORT COLLINS, HEREFORD, LOVELAND, NUNN, 
AURORA, BRIGHTON, CITY OF DENVER, DENVER INTERNATIONAL AIRPORT, 
HIGHLANDS RANCH, LITTLETON, PARKER, CASTLE ROCK, ELBERT, FONDIS, 
KIOWA, LARKSPUR, EATON, FORT LUPTON, GREELEY, AND ROGGEN
557 PM MST FRI DEC 16 2016

...WIND CHILL ADVISORY IN EFFECT FROM 5 AM TO NOON MST SATURDAY
FOR THE URBAN CORRIDOR...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WIND CHILL
ADVISORY, WHICH IS IN EFFECT FROM 5 AM TO NOON MST SATURDAY. 

* WIND CHILL VALUES...15 TO 25 BELOW ZERO.

* IMPACTS...THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN.
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

&&

$$
289 
WWUS45 KBOU 170404
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
904 PM MST FRI DEC 16 2016

...HEAVIEST SNOW EXPECTED TONIGHT OVER NORTHERN COLORADO
MOUNTAINS...

.THE HEAVIEST SNOW IS EXPECTED TONIGHT OVER THE MOUNTAINS AS THE
UPPER DISTURBANCE MOVES ACROSS COLORADO.  STRONG WESTERLY WINDS
OVER THE HIGH PASSES AND UP AROUND THE EISENHOWER TUNNEL WILL
COMBINE WITH THE HEAVY SNOWFALL TO PRODUCE HAZARDOUS AND VERY
DIFFICULT WINTER DRIVING CONDITIONS. POOR VISIBILITIES AND SNOW
COVERED ROADS MAY RESULT IN VERY SLOW TRAFFIC AND POSSIBLE ROAD
CLOSURES. SNOWFALL IS EXPECTED TO DECREASE LATE TONIGHT...WITH
LIGHTER SNOWFALL RATES INTO SATURDAY MORNING.

PEOPLE PLANNING TRAVEL INTO THE COLORADO HIGH COUNTRY THROUGH
SATURDAY MORNING SHOULD BE PREPARED FOR ADVERSE AND VERY
DIFFICULT TRAVEL CONDITIONS.

COZ031-171215-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
904 PM MST FRI DEC 16 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
SATURDAY...

* TIMING...SNOWFALL WILL INCREASE AGAIN THIS EVENING AND 
  CONTINUE INTO SATURDAY MORNING. THE HEAVIEST SNOWFALL WILL 
  OCCUR THIS EVENING. 

* SNOW ACCUMULATIONS...FROM 12 TO 24 INCHES....HEAVIEST ABOVE 
  TIMBERLINE AND WEST FACING SLOPES. 

* WIND/VISIBILITY...WEST TO SOUTHWEST WINDS OF 25 TO 45 MPH WILL 
  PRODUCE AREAS OF BLOWING AND DRIFTING SNOW. VISIBILITIES MAY 
  FALL BELOW A FEW HUNDRED FEET AT TIMES DUE TO HEAVY SNOW AND 
  BLOWING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND 
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS TODAY 
  THROUGH SATURDAY MORNING...ESPECIALLY OVER THE PASSES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL
MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

COZ033-034-171215-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/
GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE
9000 FEET-
904 PM MST FRI DEC 16 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
SATURDAY...

* TIMING...SNOWFALL WILL INCREASE IN INTENSITY THIS EVENING AND 
  CONTINUE INTO SATURDAY MORNING. SNOW WILL BE HEAVY AT TIMES 
  THIS TONIGHT. 

* SNOW ACCUMULATIONS...8 TO 16 INCHES.

* WIND/VISIBILITY...WEST TO SOUTHWEST WINDS OF 20 TO 35 MPH WITH 
  GUSTS AROUND 50 MPH WILL PRODUCE BLOWING SNOW OVER THE HIGHER 
  PASSES AND RIDGES THROUGH FRIDAY NIGHT. VISIBILITIES MAY FALL 
  BELOW A FEW HUNDRED FEET AT TIMES IN HEAVY SNOWFALL AND 
  BLOWING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND 
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS TODAY 
  THROUGH SATURDAY MORNING. TRAVEL RESTRICTIONS AND ROAD 
  CLOSURES ARE HIGHLY POSSIBLE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS AND BLOWING SNOW ARE LIKELY...
.WHICH WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

COZ042-044>046-048>051-171215-
/O.CON.KBOU.WC.W.0001.161217T1200Z-161217T1900Z/
/O.CON.KBOU.WC.Y.0002.161217T0700Z-161217T1200Z/
NORTHEAST WELD COUNTY-MORGAN COUNTY-
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-
PHILLIPS COUNTY-
904 PM MST FRI DEC 16 2016

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
5 AM MST SATURDAY...
...WIND CHILL WARNING REMAINS IN EFFECT FROM 5 AM TO NOON MST
SATURDAY...

* WIND CHILL VALUES FOR THE ADVISORY WILL RANGE FROM 15 TO 25 
  BELOW ZERO. WIND CHILL VALUES WILL DROP BELOW 25 DEGREES BELOW 
  ZERO FROM 5 AM UNTIL NOON SATURDAY. 

* IMPACTS...THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF
PRECAUTIONS ARE NOT TAKEN.

&&

$$

COZ038-040-041-043-171215-
/O.NEW.KBOU.WW.Y.0029.161217T0404Z-161217T1500Z/
/O.CON.KBOU.WC.Y.0002.161217T1200Z-161217T1900Z/
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND
ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-
ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-
CENTRAL AND SOUTH WELD COUNTY-
904 PM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 8 AM MST SATURDAY...
...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 5 AM TO NOON MST
SATURDAY...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW, WHICH IS IN EFFECT UNTIL 8 AM MST 
SATURDAY.


* TIMING...SNOW WILL CONTINUE OVERNIGHT...DECREASING EARLY
  SATURDAY.  

* SNOW ACCUMULATIONS...3 TO 5 INCHES.  

* WIND/VISIBILITY...NORTH NORTHEAST WINDS 19 TO 15 MPH WITH
  VISIBILITIES TO A HALF MILE IN SNOW AND BLOWING SNOW.  

* WIND CHILL VALUES...15 TO 25 BELOW ZERO.

* IMPACTS...THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN.
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW 
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW 
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE 
DRIVING.

&&

$$

COZ035-036-039-171215-
/O.NEW.KBOU.WW.Y.0029.161217T0404Z-161217T1500Z/
LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
904 PM MST FRI DEC 16 2016

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 8 AM MST SATURDAY...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW, WHICH IS IN EFFECT UNTIL 8 AM MST 
SATURDAY. 

* TIMING...SNOW CONTINUING OVERNIGHT...DECREASING EARLY SATURDAY. 

* SNOW ACCUMULATIONS...4 TO 6 INCHES WITH SOME LOCALLY HEAVIER 
AMOUNTS. 

* WIND/VISIBILITY...NORTHEAST WINDS 5 TO 15 MPH WILL COMBINE WITH
  FALLING SNOW TO CREATE VISIBILITIES TO A QUARTER MILE AT TIMES. 

* IMPACTS...WINTER DRIVING CONDITIONS CAN BE EXPECTED WITH
  SNOWPACKED ROADS AND LIMITED VISIBILITIES.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW 
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW 
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE 
DRIVING.

&&

$$
578 
WWUS45 KBOU 170821
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
121 AM MST SAT DEC 17 2016

...WINTER STORM BRINGING HEAVY SNOW TO THE MOUNTAINS AND THE
DENVER AREA ALONG WITH VERY COLD TEMPERATURES...

.HEAVY SNOW WILL CONTINUE OVER THE MOUNTAINS THROUGH SUNRISE.
THERE WILL ALSO BE AN AREA OF HEAVY SNOW EXTENDING FROM THE
CENTRAL AND SOUTHERN PARTS OF THE DENVER METRO AREA EAST TOWARDS
AKRON AND LIMON. SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR WILL BE
COMMON IN THESE AREAS. THIS WILL CREATE SNOW COVERED ROADS WHICH
MAY BECOME NEARLY IMPASSABLE DURING THE PERIOD OF HEAVY SNOWFALL. 

IN THESE AREAS TRAVEL SHOULD BE DELAYED IF POSSIBLE. CHECK THE
LATEST ROAD CONDITIONS AND POSSIBLE CLOSURES AT WWW.COTRIP.ORG OR
DIAL 511 FROM WITHIN COLORADO.

THE SNOW WILL DIMINISH FROM THE NORTH AND WEST LATER TONIGHT AND
SATURDAY MORNING...BUT VERY COLD TEMPERATURES WILL CONTINUE WITH
DANGEROUS WIND CHILLS.

COZ040-041-171630-
/O.UPG.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
/O.EXB.KBOU.WS.W.0011.000000T0000Z-161217T1500Z/
/O.CON.KBOU.WC.Y.0002.161217T1200Z-161217T1900Z/
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND
ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-
ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-
INCLUDING THE CITIES OF AURORA, BRIGHTON, CITY OF DENVER, 
DENVER INTERNATIONAL AIRPORT, HIGHLANDS RANCH, LITTLETON, PARKER,
CASTLE ROCK, ELBERT, FONDIS, KIOWA, AND LARKSPUR
121 AM MST SAT DEC 17 2016

...WINTER STORM WARNING IN EFFECT UNTIL 8 AM MST THIS MORNING...
...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 5 AM EARLY THIS
MORNING TO NOON MST TODAY...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM
WARNING, WHICH IS IN EFFECT UNTIL 8 AM MST THIS MORNING. THE 
WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. 

* TIMING...SNOW WILL CONTINUE OVERNIGHT AND WILL BE HEAVY ACROSS
  THE CENTRAL AND SOUTHERN PARTS OF THE DENVER METRO AREA AND
  AREAS SOUTH AND EAST OF DENVER. THE SNOW WILL DECREASE SATURDAY
  MORNING.

* SNOW ACCUMULATIONS...6 TO 12 INCHES.

* WIND/VISIBILITY...NORTHEAST WINDS 10 TO 20 MPH. VISIBILITIES
  DOWN TO A QUARTER MILE IN HEAVY SNOW. ONLY MINOR DRIFTING OF THE
  SNOW.

* WIND CHILL VALUES...15 TO 25 BELOW ZERO.

* IMPACTS...ROADS WILL BE SNOW COVERED AND MAY BECOME IMPASSABLE
  DURING THE PERIOD OF HEAVY SNOW. COLD TEMPERATURES AND WINDS 
  WILL PRODUCE DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE 
  HYPOTHERMIA CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE
EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST 
THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF 
YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN 
YOUR VEHICLE IN CASE OF AN EMERGENCY. IF YOU MUST VENTURE 
OUTDOORS THIS MORNING...MAKE SURE YOU WEAR A HAT AND GLOVES.

&&

$$

COZ045-171630-
/O.EXB.KBOU.WS.W.0011.000000T0000Z-161217T1500Z/
/O.CON.KBOU.WC.W.0001.161217T1200Z-161217T1900Z/
/O.CON.KBOU.WC.Y.0002.000000T0000Z-161217T1200Z/
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
INCLUDING THE CITIES OF BENNETT, BYERS, DEER TRAIL, AND LEADER
121 AM MST SAT DEC 17 2016

...WINTER STORM WARNING IN EFFECT UNTIL 8 AM MST THIS MORNING...
...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST EARLY
THIS MORNING...
...WIND CHILL WARNING REMAINS IN EFFECT FROM 5 AM EARLY THIS
MORNING TO NOON MST TODAY...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM
WARNING, WHICH IS IN EFFECT UNTIL 8 AM MST THIS MORNING. 

* TIMING...SNOW WILL CONTINUE OVERNIGHT AND WILL BE HEAVY AT
  TIMES. THE SNOW WILL DECREASE SATURDAY MORNING.

* SNOW ACCUMULATIONS...6 TO 12 INCHES.

* WIND CHILL VALUES FOR THE ADVISORY WILL RANGE FROM 15 TO 25 
  BELOW ZERO. WIND CHILL VALUES WILL DROP BELOW 25 DEGREES BELOW 
  ZERO FROM 5 AM UNTIL NOON SATURDAY. 

* IMPACTS...ROADS WILL BE SNOW COVERED AND MAY BECOME IMPASSABLE
  DURING THE PERIOD OF HEAVY SNOW. THE COLD TEMPERATURES AND 
  WINDS WILL PRODUCE DANGEROUS WIND CHILL TEMPERATURES WITH 
  POSSIBLE HYPOTHERMIA CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE
EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST 
THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF 
YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN 
YOUR VEHICLE IN CASE OF AN EMERGENCY. IF YOU MUST VENTURE 
OUTDOORS THIS MORNING...MAKE SURE YOU WEAR A HAT AND GLOVES.

&&

$$

COZ036-039-171500-
/O.UPG.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
/O.EXB.KBOU.WS.W.0011.000000T0000Z-161217T1500Z/
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
INCLUDING THE CITIES OF BAILEY, CENTRAL CITY, EVERGREEN, 
GEORGETOWN, IDAHO SPRINGS, WESTCREEK, ARVADA, BOULDER, GOLDEN, 
LAKEWOOD, AND LONGMONT
121 AM MST SAT DEC 17 2016

...WINTER STORM WARNING IN EFFECT UNTIL 8 AM MST THIS MORNING...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM
WARNING, WHICH IS IN EFFECT UNTIL 8 AM MST THIS MORNING. THE 
WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT.

* TIMING...SNOW CONTINUING OVERNIGHT AND WILL BE HEAVY AT TIMES
  FROM INTERSTATE 70 SOUTHWARD. THE SNOW WILL DECREASE SATURDAY
  MORNING.

* SNOW ACCUMULATIONS...6 TO 12 INCHES.

* WIND/VISIBILITY...LIGHT WINDS. VISIBILITIES AS LOW AS A QUARTER
  MILE IN HEAVY SNOW. 

* IMPACTS...ROADS WILL BE SNOW COVERED AND MAY BECOME IMPASSABLE
  DURING THE PERIOD OF HEAVY SNOW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE
EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST 
THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF 
YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN 
YOUR VEHICLE IN CASE OF AN EMERGENCY. IF YOU MUST VENTURE 
OUTDOORS THIS MORNING...MAKE SURE YOU WEAR A HAT AND GLOVES.

&&

$$

COZ046-049-171630-
/O.EXA.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
/O.CON.KBOU.WC.W.0001.161217T1200Z-161217T1900Z/
/O.CON.KBOU.WC.Y.0002.000000T0000Z-161217T1200Z/
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-WASHINGTON COUNTY-
INCLUDING THE CITIES OF AGATE, HUGO, LIMON, MATHESON, AKRON, 
COPE, LAST CHANCE, AND OTIS
121 AM MST SAT DEC 17 2016

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 8 AM MST THIS
MORNING...
...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST EARLY
THIS MORNING...
...WIND CHILL WARNING REMAINS IN EFFECT FROM 5 AM EARLY THIS
MORNING TO NOON MST TODAY...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW, WHICH IS IN EFFECT UNTIL 8 AM MST THIS
MORNING. 

* TIMING...AN AREA OF HEAVY SNOW WILL SPREAD FROM EAST OF DENVER
  AND AKRON INTO THE LIMON AREA DURING THE EARLY MORNING HOURS.
  THE SNOW WILL DIMINISH FROM NORTHWEST TO SOUTHEAST SATURDAY
  MORNING. 

* SNOW ACCUMULATIONS...4 TO 8 INCHES.

* WIND/VISIBILITY...NORTH WINDS AT 15 TO 25 MPH WILL CAUSE
  DRIFTING SNOW. VISIBILITIES AS LOW AS A QUARTER MILE IN HEAVY 
  SNOW. 

* WIND CHILL VALUES FOR THE ADVISORY WILL RANGE FROM 15 TO 25 
  BELOW ZERO. WIND CHILL VALUES WILL DROP BELOW 25 DEGREES BELOW 
  ZERO FROM 5 AM UNTIL NOON SATURDAY. 

* IMPACTS...ROADS WILL BECOME SNOW COVERED AND TRAVEL WILL BECOME
  DIFFICULT. THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TRAVELERS SHOULD BE PREPARED FOR WINTER DRIVING CONDITIONS...AND
NOTE THAT CONDITIONS ARE WORSE IN THE DENVER AREA AND IN THE
MOUNTAINS WEST OF DENVER. 

IF YOU MUST BE OUTSIDE THIS MORNING...WEAR CLOTHING THAT COVERS
YOUR SKIN...INCLUDING YOUR FACE. THE WIND CHILL WILL RESULT IN 
FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT
TAKEN.

&&

$$

COZ031-171630-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
INCLUDING THE CITIES OF EAST SLOPES PARK AND NORTHERN GORE
RANGES, GORE PASS, AND RABBIT EARS PASS
121 AM MST SAT DEC 17 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* TIMING...HEAVY SNOW WILL DIMINISH THIS MORNING. 

* SNOW ACCUMULATIONS...FROM 12 TO 24 INCHES....HEAVIEST ABOVE 
  TIMBERLINE AND WEST FACING SLOPES. 

* WIND/VISIBILITY...WEST TO SOUTHWEST WINDS OF 25 TO 45 MPH WILL 
  PRODUCE AREAS OF BLOWING AND DRIFTING SNOW. VISIBILITIES MAY 
  FALL BELOW A FEW HUNDRED FEET AT TIMES DUE TO HEAVY SNOW AND 
  BLOWING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL
MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

COZ033-034-171630-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/
GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE
9000 FEET-
INCLUDING THE CITIES OF CAMERON PASS, 
LARAMIE AND MEDICINE BOW MOUNTAINS, RABBIT EARS RANGE, 
ROCKY MOUNTAIN NATIONAL PARK, WILLOW CREEK PASS, BERTHOUD PASS, 
BRECKENRIDGE, EAST SLOPES MOSQUITO RANGE, 
EAST SLOPES SOUTHERN GORE RANGE, EISENHOWER TUNNEL, INDIAN PEAKS,
KENOSHA MOUNTAINS, MOUNT EVANS, WILLIAMS FORK MOUNTAINS, 
AND WINTER PARK
121 AM MST SAT DEC 17 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* TIMING...HEAVY SNOW WILL CONTINUE OVERNIGHT...THEN DIMINISH
  SATURDAY MORNING. 

* SNOW ACCUMULATIONS...12 TO 24 INCHES.

* WIND/VISIBILITY...WEST TO SOUTHWEST WINDS OF 20 TO 35 MPH WITH 
  GUSTS AROUND 50 MPH WILL PRODUCE BLOWING SNOW OVER THE HIGHER 
  PASSES AND RIDGES THROUGH FRIDAY NIGHT. VISIBILITIES MAY FALL 
  BELOW A FEW HUNDRED FEET AT TIMES IN HEAVY SNOWFALL AND 
  BLOWING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS. TRAVEL 
  RESTRICTIONS AND ROAD CLOSURES ARE HIGHLY POSSIBLE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS AND BLOWING SNOW ARE LIKELY...
.WHICH WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

COZ042-044-048-050-051-171630-
/O.CON.KBOU.WC.W.0001.161217T1200Z-161217T1900Z/
/O.CON.KBOU.WC.Y.0002.000000T0000Z-161217T1200Z/
NORTHEAST WELD COUNTY-MORGAN COUNTY-LOGAN COUNTY-SEDGWICK COUNTY-
PHILLIPS COUNTY-
INCLUDING THE CITIES OF BRIGGSDALE, GROVER, PAWNEE BUTTES, 
RAYMER, STONEHAM, BRUSH, FORT MORGAN, GOODRICH, WIGGINS, CROOK, 
MERINO, STERLING, PEETZ, JULESBURG, OVID, SEDGWICK, AMHERST, 
HAXTUN, AND HOLYOKE
121 AM MST SAT DEC 17 2016

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST EARLY
THIS MORNING...
...WIND CHILL WARNING REMAINS IN EFFECT FROM 5 AM EARLY THIS
MORNING TO NOON MST TODAY...

* WIND CHILL VALUES FOR THE ADVISORY WILL RANGE FROM 15 TO 25 
  BELOW ZERO. WIND CHILL VALUES WILL DROP BELOW 25 DEGREES BELOW 
  ZERO FROM 5 AM UNTIL NOON SATURDAY. 

* IMPACTS...THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF
PRECAUTIONS ARE NOT TAKEN.

&&

$$

COZ037-171500-
/O.EXA.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
CENTRAL AND SOUTHEAST PARK COUNTY-
INCLUDING THE CITIES OF FAIRPLAY, HARTSEL, LAKE GEORGE, 
AND SOUTH PARK
121 AM MST SAT DEC 17 2016

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 8 AM MST THIS
MORNING...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW, WHICH IS IN EFFECT UNTIL 8 AM MST THIS
MORNING. 

* TIMING...SNOW WILL BE HEAVY AT TIMES OVERNIGHT...DECREASING 
  EARLY SATURDAY. 

* SNOW ACCUMULATIONS...4 TO 8 INCHES.

* WIND/VISIBILITY...LIGHT WINDS. VISIBILITY DOWN TO A QUARTER MILE
  AT TIMES IN HEAVY SNOW. 

* WIND CHILL VALUES...15 TO 25 BELOW ZERO.

* IMPACTS...ROADS WILL BECOME SNOW COVERED AND TRAVEL WILL BE 
  DIFFICULT. THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW 
WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED 
ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

&&

$$

COZ038-043-171630-
/O.CON.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
/O.CON.KBOU.WC.Y.0002.161217T1200Z-161217T1900Z/
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
CENTRAL AND SOUTH WELD COUNTY-
INCLUDING THE CITIES OF FORT COLLINS, HEREFORD, LOVELAND, NUNN, 
EATON, FORT LUPTON, GREELEY, AND ROGGEN
121 AM MST SAT DEC 17 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST THIS
MORNING...
...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 5 AM EARLY THIS
MORNING TO NOON MST TODAY...

* TIMING...SNOW WILL DIMINISH THROUGH THE OVERNIGHT HOURS.

* SNOW ACCUMULATIONS...3 TO 6 INCHES.

* WIND/VISIBILITY...NORTH NORTHEAST WINDS 10 TO 20 MPH WITH
  VISIBILITIES TO A HALF MILE IN SNOW. ONLY MINOR DRIFTING OF THE
  SNOW.

* WIND CHILL VALUES...15 TO 25 BELOW ZERO.

* IMPACTS...ROADS WILL BE SNOW COVERED AND TRAVEL WILL BE
  DIFFICULT DURING THE OVERNIGHT HOURS. THE COLD TEMPERATURES AND
  WINDS WILL PRODUCE DANGEROUS WIND CHILL TEMPERATURES WITH 
  POSSIBLE HYPOTHERMIA CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN.
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED 
ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

&&

$$

COZ035-171500-
/O.CON.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-
INCLUDING THE CITIES OF ESTES PARK, GLENDEVEY, NEDERLAND, 
AND RED FEATHER LAKES
121 AM MST SAT DEC 17 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST THIS
MORNING...

* TIMING...SNOW WILL DIMINISH OVERNIGHT.

* SNOW ACCUMULATIONS...5 TO 8 INCHES.

* WIND/VISIBILITY...LIGHT WINDS WITH ONLY MINOR DRIFTING OF THE
  SNOW. VISIBILITIES DOWN TO A HALF MILE AT TIMES.

* IMPACTS...WINTER DRIVING CONDITIONS CAN BE EXPECTED WITH 
  SNOWPACKED ROADS AND LIMITED VISIBILITIES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

GIMMESTAD
202 
WWUS45 KBOU 171302
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
602 AM MST SAT DEC 17 2016

...WINTER STORM MOVING ONTO THE PLAINS THIS MORNING ALONG WITH 
VERY COLD TEMPERATURES...

.HEAVY SNOW HAS SPREAD ONTO THE PLAINS EAST OF DENVER THIS MORNING
WITH DECREASING SNOW IN THE MOUNTAINS AND THE DENVER AREA. AREAS
AROUND LIMON WILL SEE DECREASING SNOW BY MID MORNING. 

ROADS REMAIN SNOW COVERED EARLY THIS MORNING MAKING FOR SLOW
TRAVEL. CONDITIONS WILL IMPROVE LATER THIS MORNING...SO IT MAY BE
WISE TO DELAY TRAVEL...ESPECIALLY EAST OF DENVER. CHECK THE 
LATEST ROAD CONDITIONS AND POSSIBLE CLOSURES AT WWW.COTRIP.ORG OR 
DIAL 511 FROM WITHIN COLORADO.

THE SNOW WILL CONTINUE TO DIMINISH FROM THE NORTH AND WEST THIS 
MORNING...BUT VERY COLD TEMPERATURES WILL CONTINUE WITH DANGEROUS 
WIND CHILLS.

COZ038-043-171900-
/O.CAN.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
/O.CON.KBOU.WC.Y.0002.000000T0000Z-161217T1900Z/
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
CENTRAL AND SOUTH WELD COUNTY-
INCLUDING THE CITIES OF FORT COLLINS, HEREFORD, LOVELAND, NUNN, 
EATON, FORT LUPTON, GREELEY, AND ROGGEN
602 AM MST SAT DEC 17 2016

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY...
...WINTER WEATHER ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE WINTER
WEATHER ADVISORY. 

* WIND CHILL VALUES...15 TO 25 BELOW ZERO.

* IMPACTS...SNOW COVERED ROADS CAN STILL BE EXPECTED THIS MORNING.
  THE COLD TEMPERATURES AND WINDS WILL PRODUCE DANGEROUS WIND
  CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA CONDITIONS WITH
  EXPOSED SKIN.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU MUST VENTURE OUTDOORS THIS MORNING...MAKE SURE 
YOU WEAR A HAT AND GLOVES.

&&


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. 
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

&&

$$

COZ035-171415-
/O.CAN.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-
INCLUDING THE CITIES OF ESTES PARK, GLENDEVEY, NEDERLAND, 
AND RED FEATHER LAKES
602 AM MST SAT DEC 17 2016

...WINTER WEATHER ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE WINTER
WEATHER ADVISORY. 

THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE WINTER
WEATHER ADVISORY. 

A FEW FLURRIES ARE STILL POSSIBLE...AND TEMPERATURES WILL REMAIN
QUITE COLD TODAY.


$$

COZ045-171900-
/O.CON.KBOU.WC.W.0001.000000T0000Z-161217T1900Z/
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1500Z/
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
INCLUDING THE CITIES OF BENNETT, BYERS, DEER TRAIL, AND LEADER
602 AM MST SAT DEC 17 2016

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY...
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 AM MST THIS
MORNING...

* TIMING...SNOW WILL DIMINISH THIS MORNING. 

* SNOW ACCUMULATIONS...TOTALS OF 6 TO 12 INCHES.

* WIND CHILL VALUES WILL DROP AS LOW AS 25 DEGREES BELOW ZERO THIS
  MORNING.

* IMPACTS...ROADS WILL BE SNOW COVERED AND TRAVEL WILL BE
  DIFFICULT UNTIL LATER THIS MORNING. THE COLD TEMPERATURES AND
  WINDS WILL PRODUCE DANGEROUS WIND CHILL TEMPERATURES WITH
  POSSIBLE HYPOTHERMIA CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE
EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST
THAT WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN 
EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN
EMERGENCY. IF YOU MUST VENTURE OUTDOORS THIS MORNING...MAKE SURE 
YOU WEAR A HAT AND GLOVES.

&&

$$

COZ040-041-171900-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1500Z/
/O.CON.KBOU.WC.Y.0002.000000T0000Z-161217T1900Z/
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND
ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-
ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-
INCLUDING THE CITIES OF AURORA, BRIGHTON, CITY OF DENVER, 
DENVER INTERNATIONAL AIRPORT, HIGHLANDS RANCH, LITTLETON, PARKER,
CASTLE ROCK, ELBERT, FONDIS, KIOWA, AND LARKSPUR
602 AM MST SAT DEC 17 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 AM MST THIS
MORNING...
...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY...

* TIMING...SNOW WILL CONTINUE TO DECREASE THIS MORNING. 

* SNOW ACCUMULATIONS...AN ADDITIONAL INCH OR TWO IN AREAS SOUTH OF
  DENVER WITH LIGHTER SNOW FURTHER NORTH. STORM TOTALS WILL BE 4 
  TO 12 INCHES.

* WIND/VISIBILITY...NORTHEAST WINDS 10 TO 20 MPH WILL PRODUCE 
  MINOR DRIFTING OF THE SNOW. 

* WIND CHILL VALUES...15 TO 25 BELOW ZERO.

* IMPACTS...ROADS WILL BE SNOW COVERED AND TRAVEL WILL BE
  DIFFICULT. COLD TEMPERATURES AND WINDS WILL PRODUCE DANGEROUS 
  WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA CONDITIONS 
  WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE
EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST
THAT WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN 
EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN
EMERGENCY. IF YOU MUST VENTURE OUTDOORS THIS MORNING...MAKE SURE 
YOU WEAR A HAT AND GLOVES.

&&

$$

COZ046-049-171900-
/O.CON.KBOU.WC.W.0001.000000T0000Z-161217T1900Z/
/O.CON.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-WASHINGTON COUNTY-
INCLUDING THE CITIES OF AGATE, HUGO, LIMON, MATHESON, AKRON, 
COPE, LAST CHANCE, AND OTIS
602 AM MST SAT DEC 17 2016

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST THIS
MORNING...

* TIMING...HEAVY SNOW WILL DIMINISH BY MID MORNING. 

* SNOW ACCUMULATIONS...TOTALS OF 4 TO 8 INCHES.

* WIND/VISIBILITY...NORTH WINDS AT 15 TO 25 MPH WILL CAUSE 
  DRIFTING SNOW. VISIBILITIES AS LOW AS A QUARTER MILE IN HEAVY 
  SNOW. 

* WIND CHILL VALUES WILL DROP AS LOW AS 25 DEGREES BELOW ZERO 
  THIS MORNING.

* IMPACTS...ROADS WILL BE SNOW COVERED AND TRAVEL WILL BECOME 
  DIFFICULT. THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TRAVELERS SHOULD BE PREPARED FOR WINTER DRIVING CONDITIONS. IF 
YOU MUST BE OUTSIDE THIS MORNING...WEAR CLOTHING THAT COVERS YOUR 
SKIN...INCLUDING YOUR FACE. THE WIND CHILL WILL RESULT IN FROST 
BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT 
TAKEN.

&&

$$

COZ031-171800-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
INCLUDING THE CITIES OF EAST SLOPES PARK AND NORTHERN GORE
RANGES, GORE PASS, AND RABBIT EARS PASS
602 AM MST SAT DEC 17 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* TIMING...SNOW WILL DIMINISH THIS MORNING.

* SNOW ACCUMULATIONS...FROM 12 TO 24 INCHES....HEAVIEST ABOVE 
  TIMBERLINE AND WEST FACING SLOPES. 

* WIND/VISIBILITY...NORTHWEST WINDS OF 15 TO 30 MPH WILL PRODUCE
  AREAS OF BLOWING AND DRIFTING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND 
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL
MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

COZ033-034-171800-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/
GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE
9000 FEET-
INCLUDING THE CITIES OF CAMERON PASS, 
LARAMIE AND MEDICINE BOW MOUNTAINS, RABBIT EARS RANGE, 
ROCKY MOUNTAIN NATIONAL PARK, WILLOW CREEK PASS, BERTHOUD PASS, 
BRECKENRIDGE, EAST SLOPES MOSQUITO RANGE, 
EAST SLOPES SOUTHERN GORE RANGE, EISENHOWER TUNNEL, INDIAN PEAKS,
KENOSHA MOUNTAINS, MOUNT EVANS, WILLIAMS FORK MOUNTAINS, 
AND WINTER PARK
602 AM MST SAT DEC 17 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* TIMING...SNOW WILL DIMINISH THIS MORNING. 

* SNOW ACCUMULATIONS...12 TO 24 INCHES.

* WIND/VISIBILITY...NORTHWEST WINDS OF 15 TO 30 MPH WILL PRODUCE
  AREAS OF BLOWING AND DRIFTING SNOW.  

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS. TRAVEL
  RESTRICTIONS AND ROAD CLOSURES ARE LIKELY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS AND BLOWING SNOW ARE LIKELY...
WHICH WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.
&&

$$

COZ036-039-171500-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1500Z/
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
INCLUDING THE CITIES OF BAILEY, CENTRAL CITY, EVERGREEN, 
GEORGETOWN, IDAHO SPRINGS, WESTCREEK, ARVADA, BOULDER, GOLDEN, 
LAKEWOOD, AND LONGMONT
602 AM MST SAT DEC 17 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 AM MST THIS
MORNING...

* TIMING...SNOW WILL DECREASE SATURDAY MORNING. 

* SNOW ACCUMULATIONS...TOTALS OF 6 TO 12 INCHES.

* WIND/VISIBILITY...LIGHT WINDS.  

* IMPACTS...ROADS WILL BE SNOW COVERED AND TRAVEL WILL BE
  DIFFICULT EARLY THIS MORNING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE
EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST
THAT WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN 
EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN
EMERGENCY. IF YOU MUST VENTURE OUTDOORS THIS MORNING...MAKE SURE 
YOU WEAR A HAT AND GLOVES.

&&

$$

COZ042-044-048-050-051-171900-
/O.CON.KBOU.WC.W.0001.000000T0000Z-161217T1900Z/
NORTHEAST WELD COUNTY-MORGAN COUNTY-LOGAN COUNTY-SEDGWICK COUNTY-
PHILLIPS COUNTY-
INCLUDING THE CITIES OF BRIGGSDALE, GROVER, PAWNEE BUTTES, 
RAYMER, STONEHAM, BRUSH, FORT MORGAN, GOODRICH, WIGGINS, CROOK, 
MERINO, STERLING, PEETZ, JULESBURG, OVID, SEDGWICK, AMHERST, 
HAXTUN, AND HOLYOKE
602 AM MST SAT DEC 17 2016

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY...

* WIND CHILL VALUES WILL DROP AS LOW AS 25 DEGREES BELOW ZERO 
  THIS MORNING.

* IMPACTS...THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF
PRECAUTIONS ARE NOT TAKEN.
&&

$$

COZ047-171900-
/O.EXA.KBOU.WC.Y.0002.000000T0000Z-161217T1900Z/
/O.EXA.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY-
INCLUDING THE CITIES OF FORDER, KARVAL, KUTCH, AND PUNKIN CENTER
602 AM MST SAT DEC 17 2016

...WIND CHILL ADVISORY IN EFFECT UNTIL NOON MST TODAY...
...WINTER WEATHER ADVISORY IN EFFECT UNTIL 8 AM MST THIS
MORNING...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW, WHICH IS IN EFFECT UNTIL 8 AM MST THIS
MORNING. A WIND CHILL ADVISORY HAS ALSO BEEN ISSUED. THIS WIND 
CHILL ADVISORY IS IN EFFECT UNTIL NOON MST TODAY. 

* TIMING...SNOW WILL BE HEAVY AT TIMES FOR A FEW HOURS THIS
  MORNING...THEN DIMINISH.  

* SNOW ACCUMULATIONS...2 TO 5 INCHES.

* WIND/VISIBILITY...NORTHEAST WINDS 10 TO 20 MPH. VISIBILITIES 
  DOWN TO A QUARTER MILE IN HEAVY SNOW. ONLY MINOR DRIFTING OF 
  THE SNOW. 

* WIND CHILL VALUES...15 TO 25 BELOW ZERO.

* IMPACTS...ROADS WILL BE SNOW COVERED AND TRAVEL MAY BECOME
  DIFFICULT DURING THE PERIOD OF HEAVY SNOW. COLD TEMPERATURES 
  AND WINDS WILL PRODUCE DANGEROUS WIND CHILL TEMPERATURES WITH 
  POSSIBLE HYPOTHERMIA CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TRAVELERS SHOULD BE PREPARED FOR WINTER DRIVING CONDITIONS.
IF YOU MUST BE OUTSIDE THIS MORNING...WEAR CLOTHING THAT COVERS 
YOUR SKIN...INCLUDING YOUR FACE. 

&&

$$

COZ037-171500-
/O.CON.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
CENTRAL AND SOUTHEAST PARK COUNTY-
INCLUDING THE CITIES OF FAIRPLAY, HARTSEL, LAKE GEORGE, 
AND SOUTH PARK
602 AM MST SAT DEC 17 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST THIS
MORNING...

* TIMING...SNOW WILL BE HEAVY AT TIMES OVERNIGHT...DECREASING 
  EARLY SATURDAY. 

* SNOW ACCUMULATIONS...4 TO 8 INCHES.

* WIND/VISIBILITY...LIGHT WINDS. VISIBILITY DOWN TO A QUARTER 
  MILE AT TIMES IN HEAVY SNOW. 

* WIND CHILL VALUES...15 TO 25 BELOW ZERO.

* IMPACTS...ROADS WILL BECOME SNOW COVERED AND TRAVEL WILL BE 
  DIFFICULT. THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED
ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

&&

$$
159 
WWUS45 KBOU 171515
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
815 AM MST SAT DEC 17 2016

...WINTER STORM MOVING ONTO THE PLAINS THIS MORNING ALONG WITH
VERY COLD TEMPERATURES...

.ACCUMULATING SNOWFALL HAS GENERALLY ENDED ON THE PLAINS ON
NORTHEAST COLORADO ROUGHLY NORTH OF INTERSTATE 70. SOUTH OF THE
INTERSTATE LIGHT TO IN SOME AREAS MODERATE SNOWFALL CONTINUES
WITH THE HEAVIER SNOWFALL STILL OCCURRING ACROSS ELBERT AND 
LINCOLN COUNTIES. SNOWFALL IN THIS AREA SHOULD DIMINISH BY AROUND
10 AM MST. IN THE HIGH COUNTRY...ONLY ARES OF LIGHT SNOWFALL 
CONTINUES AND THEREFORE ADDITIONAL ACCUMULATIONS WILL BE MINIMAL.

ROADS REMAIN SNOW COVERED THIS MORNING MAKING FOR SLOW TRAVEL. 
DRIVING CONDITIONS SHOULD IMPROVE LATER THIS MORNING.. IF YOU NEED
TO TRAVEL THIS MORNING...ESPECIALLY UP INTO THE HIGH COUNTRY... 
CHECK THE LATEST ROAD CONDITIONS AND POSSIBLE CLOSURES AT 
WWW.COTRIP.ORG OR DIAL 511 FROM WITHIN COLORADO.

FINALLY....VERY COLD TEMPERATURES AND LIGHT NORTHERLY WINDS WILL 
CONTINUE TO PRODUCE DANGEROUS WIND CHILLS THIS MORNING.


COZ045-171900-
/O.EXP.KBOU.WS.W.0011.000000T0000Z-161217T1500Z/
/O.CON.KBOU.WC.W.0001.000000T0000Z-161217T1900Z/
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
INCLUDING THE CITIES OF BENNETT, BYERS, DEER TRAIL, AND LEADER
815 AM MST SAT DEC 17 2016

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY...
...WINTER STORM WARNING EXPIRED AT 8 AM MST THIS MORNING...

WIND CHILL VALUES AS LOW AS 25 DEGREES BELOW ZERO THIS MORNING.

  *IMPACTS...ROADS WILL BE SNOW COVERED AND TRAVEL WILL BE 
   DIFFICULT UNTIL LATER THIS MORNING. THE COLD TEMPERATURES AND 
   WINDS WILL PRODUCE DANGEROUS WIND CHILL TEMPERATURES WITH 
   POSSIBLE HYPOTHERMIA CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD...AND WATER 
IN YOUR VEHICLE IN CASE OF AN EMERGENCY. IF YOU MUST VENTURE 
OUTDOORS THIS MORNING...MAKE SURE YOU WEAR A HAT AND GLOVES.

&&


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF
PRECAUTIONS ARE NOT TAKEN.

&&

$$

COZ040-041-171900-
/O.EXP.KBOU.WS.W.0011.000000T0000Z-161217T1500Z/
/O.CON.KBOU.WC.Y.0002.000000T0000Z-161217T1900Z/
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND
ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-
ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-
INCLUDING THE CITIES OF AURORA, BRIGHTON, CITY OF DENVER, 
DENVER INTERNATIONAL AIRPORT, HIGHLANDS RANCH, LITTLETON, PARKER,
CASTLE ROCK, ELBERT, FONDIS, KIOWA, AND LARKSPUR
815 AM MST SAT DEC 17 2016

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY...
...WINTER STORM WARNING EXPIRED AT 8 AM MST THIS MORNING...

* WIND CHILL VALUES...AS LOW AS 15 TO 20 BELOW ZERO THIS MORNING

* IMPACTS...ROADS WILL BE SNOW COVERED AND TRAVEL WILL BE 
  DIFFICULT. COLD TEMPERATURES AND WINDS WILL PRODUCE DANGEROUS 
  WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA CONDITIONS 
  WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER
IN YOUR VEHICLE IN CASE OF AN EMERGENCY. IF YOU MUST VENTURE 
OUTDOORS THIS MORNING...MAKE SURE YOU WEAR A HAT AND GLOVES.

&&


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. 
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

&&

$$

COZ036-039-171615-
/O.EXP.KBOU.WS.W.0011.000000T0000Z-161217T1500Z/
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
INCLUDING THE CITIES OF BAILEY, CENTRAL CITY, EVERGREEN, 
GEORGETOWN, IDAHO SPRINGS, WESTCREEK, ARVADA, BOULDER, GOLDEN, 
LAKEWOOD, AND LONGMONT
815 AM MST SAT DEC 17 2016

...WINTER STORM WARNING EXPIRED AT 8 AM MST THIS MORNING...

SNOWFALL WAS ON THE DECLINE ALONG THE FRONT RANGE AND WILL
CONTINUE TO DO SO OVER THE NEXT COUPLE OF HOURS. ANY ADDITIONAL
SNOW ACCUMULATION WILL BE MINIMAL...GENERALLY UNDER AN INCH.
THEREFORE THE WINTER STORM WARNING WILL BE ALLOWED TO EXPIRE.

$$

COZ046-049-171900-
/O.EXP.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
/O.CON.KBOU.WC.W.0001.000000T0000Z-161217T1900Z/
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-WASHINGTON COUNTY-
INCLUDING THE CITIES OF AGATE, HUGO, LIMON, MATHESON, AKRON, 
COPE, LAST CHANCE, AND OTIS
815 AM MST SAT DEC 17 2016

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY...
...WINTER WEATHER ADVISORY WILL EXPIRE AT 8 AM MST THIS MORNING...

* WIND CHILL VALUES WILL DROP AS LOW AS 25 DEGREES BELOW ZERO  
THIS MORNING.

* IMPACTS...ROADS WILL BE SNOW COVERED AND TRAVEL WILL BECOME 
  DIFFICULT. THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TRAVELERS SHOULD BE PREPARED FOR WINTER DRIVING CONDITIONS. IF
YOU MUST BE OUTSIDE THIS MORNING...WEAR CLOTHING THAT COVERS YOUR
SKIN...INCLUDING YOUR FACE. THE WIND CHILL WILL RESULT IN FROST
BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT
TAKEN.

&&


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF
PRECAUTIONS ARE NOT TAKEN.

&&

$$

COZ047-171900-
/O.EXP.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
/O.CON.KBOU.WC.Y.0002.000000T0000Z-161217T1900Z/
SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY-
INCLUDING THE CITIES OF FORDER, KARVAL, KUTCH, AND PUNKIN CENTER
815 AM MST SAT DEC 17 2016

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY...
...WINTER WEATHER ADVISORY EXPIRED AT 8 AM MST THIS MORNING...

* WIND CHILL VALUES...15 TO 20 BELOW ZERO.

* IMPACTS...ROADS WILL BE SNOW COVERED AND TRAVEL MAY BECOME 
  DIFFICULT DURING THE PERIOD OF HEAVY SNOW. COLD TEMPERATURES 
  AND WINDS WILL PRODUCE DANGEROUS WIND CHILL TEMPERATURES WITH 
  POSSIBLE HYPOTHERMIA CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TRAVELERS SHOULD BE PREPARED FOR WINTER DRIVING CONDITIONS. IF
YOU MUST BE OUTSIDE THIS MORNING...WEAR CLOTHING THAT COVERS YOUR
SKIN...INCLUDING YOUR FACE.

&&

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN. 
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

&&

$$

COZ037-171615-
/O.EXP.KBOU.WW.Y.0029.000000T0000Z-161217T1500Z/
CENTRAL AND SOUTHEAST PARK COUNTY-
INCLUDING THE CITIES OF FAIRPLAY, HARTSEL, LAKE GEORGE, 
AND SOUTH PARK
815 AM MST SAT DEC 17 2016

...WINTER WEATHER ADVISORY WILL EXPIRE AT 8 AM MST THIS MORNING...

* SNOWFALL HAS ENDED. 

TRAVELERS SHOULD BE PREPARED FOR WINTER DRIVING CONDITIONS. IF
YOU MUST BE OUTSIDE THIS MORNING...WEAR CLOTHING THAT COVERS YOUR
SKIN...INCLUDING YOUR FACE. THE WIND CHILL WILL RESULT IN FROST
BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT
TAKEN.

&&

$$

COZ031-171800-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
INCLUDING THE CITIES OF EAST SLOPES PARK AND NORTHERN GORE
RANGES, GORE PASS, AND RABBIT EARS PASS
815 AM MST SAT DEC 17 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* TIMING...SNOW WILL DIMINISH THIS MORNING.

* SNOW ACCUMULATIONS...FROM 12 TO 24 INCHES....HEAVIEST ABOVE 
  TIMBERLINE AND WEST FACING SLOPES. 

* WIND/VISIBILITY...NORTHWEST WINDS OF 15 TO 30 MPH WILL PRODUCE 
  AREAS OF BLOWING AND DRIFTING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND 
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL
MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

COZ033-034-171800-
/O.CON.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/
GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE
9000 FEET-
INCLUDING THE CITIES OF CAMERON PASS, 
LARAMIE AND MEDICINE BOW MOUNTAINS, RABBIT EARS RANGE, 
ROCKY MOUNTAIN NATIONAL PARK, WILLOW CREEK PASS, BERTHOUD PASS, 
BRECKENRIDGE, EAST SLOPES MOSQUITO RANGE, 
EAST SLOPES SOUTHERN GORE RANGE, EISENHOWER TUNNEL, INDIAN PEAKS,
KENOSHA MOUNTAINS, MOUNT EVANS, WILLIAMS FORK MOUNTAINS, 
AND WINTER PARK
815 AM MST SAT DEC 17 2016

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* TIMING...SNOW WILL DIMINISH THIS MORNING.

* SNOW ACCUMULATIONS...12 TO 24 INCHES.

* WIND/VISIBILITY...NORTHWEST WINDS OF 15 TO 30 MPH WILL PRODUCE 
  AREAS OF BLOWING AND DRIFTING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND 
  VERY DIFFICULT TRAVEL CONDITIONS ACROSS THE MOUNTAINS. TRAVEL 
  RESTRICTIONS AND ROAD CLOSURES ARE LIKELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. STRONG WINDS AND BLOWING SNOW ARE LIKELY...
WHICH WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. 

&&

$$


COZ042-044-048-050-051-171900-
/O.CON.KBOU.WC.W.0001.000000T0000Z-161217T1900Z/
NORTHEAST WELD COUNTY-MORGAN COUNTY-LOGAN COUNTY-SEDGWICK COUNTY-
PHILLIPS COUNTY-
INCLUDING THE CITIES OF BRIGGSDALE, GROVER, PAWNEE BUTTES, 
RAYMER, STONEHAM, BRUSH, FORT MORGAN, GOODRICH, WIGGINS, CROOK, 
MERINO, STERLING, PEETZ, JULESBURG, OVID, SEDGWICK, AMHERST, 
HAXTUN, AND HOLYOKE
815 AM MST SAT DEC 17 2016

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY...

* WIND CHILL VALUES WILL DROP AS LOW AS 25 DEGREES BELOW ZERO 
  THIS MORNING. 

* IMPACTS...THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF
PRECAUTIONS ARE NOT TAKEN. 
&&

$$

COZ038-043-171900-
/O.CON.KBOU.WC.Y.0002.000000T0000Z-161217T1900Z/
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
CENTRAL AND SOUTH WELD COUNTY-
INCLUDING THE CITIES OF FORT COLLINS, HEREFORD, LOVELAND, NUNN, 
EATON, FORT LUPTON, GREELEY, AND ROGGEN
815 AM MST SAT DEC 17 2016

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY...

* WIND CHILL VALUES...15 TO 25 BELOW ZERO.

* IMPACTS...SNOW COVERED ROADS CAN STILL BE EXPECTED THIS 
  MORNING. THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU MUST VENTURE OUTDOORS THIS MORNING...MAKE SURE YOU WEAR A
HAT AND GLOVES.

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN.
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

&&

$$
378 
WWUS45 KBOU 171633
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
933 AM MST SAT DEC 17 2016

...WINTER STORM MOVING ONTO THE PLAINS THIS MORNING ALONG WITH
VERY COLD TEMPERATURES...

.AS OF MID-MORNING SNOWFALL HAD ENDED IN MOST AREAS ON THE PLAINS
ROUGHLY NORTH OF INTERSTATE 70. SOUTH OF THE INTERSTATE A BAND OF
LIGHT TO MODERATE SNOWFALL CONTINUES...HOWEVER SNOWFALL SHOULD 
END IN THIS AREA AS WELL BY AROUND MIDDAY. IN THE HIGH COUNTRY...AREAS
MAINLY ALONG AND WEST OF THE CONTINENTAL DIVIDE WILL CONTINUE TO 
SEE PERIODS OF LIGHT SNOWFALL AT LEAST THROUGH EARLY THIS 
AFTERNOON WITH NEW ACCUMULATIONS GENERALLY UNDER 2 INCHES. 
CLEARING SKIES WILL THEN SPREAD SOUTH AND EAST OVER NORTH CENTRAL
AND NORTHEAST COLORADO LATER THIS AFTERNOON. THIS WILL ALLOW FOR 
STRONG COOLING OVERNIGHT AND THE POSSIBILITY SETTING SOME NEW 
RECORD LOWS TONIGHT. 

ROADS REMAIN SNOW COVERED THIS MORNING MAKING FOR SLOW TRAVEL.
DRIVING CONDITIONS SHOULD IMPROVE LATE THIS MORNING INTO EARLY
AFTERNOON. IF YOU NEED TO TRAVEL THIS MORNING...PARTICULARLY 
UP INTO THE HIGH COUNTRY...CHECK THE LATEST ROAD CONDITIONS AND 
POSSIBLE CLOSURES AT WWW.COTRIP.ORG OR DIAL 511 FROM WITHIN 
COLORADO.

FINALLY....VERY COLD TEMPERATURES AND NORTHERLY WINDS WILL 
CONTINUE TO PRODUCE DANGEROUS WIND CHILLS ON THE PLAINS FOR THE 
REMAINDER OF THE MORNING.

COZ031-033-034-171745-
/O.CAN.KBOU.WS.W.0011.000000T0000Z-161217T1800Z/
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/
GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE
9000 FEET-
INCLUDING THE CITIES OF EAST SLOPES PARK AND NORTHERN GORE
RANGES, GORE PASS, RABBIT EARS PASS, CAMERON PASS, 
LARAMIE AND MEDICINE BOW MOUNTAINS, RABBIT EARS RANGE, 
ROCKY MOUNTAIN NATIONAL PARK, WILLOW CREEK PASS, BERTHOUD PASS, 
BRECKENRIDGE, EAST SLOPES MOSQUITO RANGE, 
EAST SLOPES SOUTHERN GORE RANGE, EISENHOWER TUNNEL, INDIAN PEAKS,
KENOSHA MOUNTAINS, MOUNT EVANS, WILLIAMS FORK MOUNTAINS, 
AND WINTER PARK
933 AM MST SAT DEC 17 2016

...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE WINTER
STORM WARNING FOR THE NORTHERN MOUNTAINS OF COLORADO. 

SNOWFALL WILL CONTINUE TO DIMINISH IN THE HIGH COUNTRY THIS
MORNING. POCKETS OF LIGHT ACCUMULATION IS STILL POSSIBLE UNTIL 
AROUND MIDDAY MAINLY ALONG AND WEST OF THE CONTINENTAL DIVIDE.

ROADS REMAIN SNOW COVERED THIS MORNING MAKING FOR SLOW TRAVEL.
DRIVING CONDITIONS SHOULD IMPROVE LATE THIS MORNING INTO EARLY
AFTERNOON. IF YOU NEED TO TRAVEL THIS MORNING...PARTICULARLY 
UP INTO THE HIGH COUNTRY...CHECK THE LATEST ROAD CONDITIONS AND 
POSSIBLE CLOSURES AT WWW.COTRIP.ORG OR DIAL 511 FROM WITHIN 
COLORADO.

$$

COZ042-044>046-048>051-171900-
/O.CON.KBOU.WC.W.0001.000000T0000Z-161217T1900Z/
NORTHEAST WELD COUNTY-MORGAN COUNTY-
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-
PHILLIPS COUNTY-
INCLUDING THE CITIES OF BRIGGSDALE, GROVER, PAWNEE BUTTES, 
RAYMER, STONEHAM, BRUSH, FORT MORGAN, GOODRICH, WIGGINS, BENNETT,
BYERS, DEER TRAIL, LEADER, AGATE, HUGO, LIMON, MATHESON, CROOK, 
MERINO, STERLING, PEETZ, AKRON, COPE, LAST CHANCE, OTIS, 
JULESBURG, OVID, SEDGWICK, AMHERST, HAXTUN, AND HOLYOKE
933 AM MST SAT DEC 17 2016

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY...

* WIND CHILL VALUES WILL DROP AS LOW AS 25 DEGREES BELOW ZERO 
  THIS MORNING. 

* IMPACTS...THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND
STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS
WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF
PRECAUTIONS ARE NOT TAKEN. 
&&

$$

COZ038-040-041-043-047-171900-
/O.CON.KBOU.WC.Y.0002.000000T0000Z-161217T1900Z/
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND
ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-
ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-
CENTRAL AND SOUTH WELD COUNTY-
SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY-
INCLUDING THE CITIES OF FORT COLLINS, HEREFORD, LOVELAND, NUNN, 
AURORA, BRIGHTON, CITY OF DENVER, DENVER INTERNATIONAL AIRPORT, 
HIGHLANDS RANCH, LITTLETON, PARKER, CASTLE ROCK, ELBERT, FONDIS, 
KIOWA, LARKSPUR, EATON, FORT LUPTON, GREELEY, ROGGEN, FORDER, 
KARVAL, KUTCH, AND PUNKIN CENTER
933 AM MST SAT DEC 17 2016

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY...

* WIND CHILL VALUES...15 TO 20 BELOW ZERO.

* IMPACTS...SNOW COVERED ROADS CAN STILL BE EXPECTED THIS 
  MORNING. THE COLD TEMPERATURES AND WINDS WILL PRODUCE 
  DANGEROUS WIND CHILL TEMPERATURES WITH POSSIBLE HYPOTHERMIA 
  CONDITIONS WITH EXPOSED SKIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU MUST VENTURE OUTDOORS THIS MORNING...MAKE SURE YOU WEAR A
HAT AND GLOVES.

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS
WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN
FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN.
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

&&

$$
BAKER
286 
WWUS45 KBOU 171907
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1207 PM MST SAT DEC 17 2016

COZ042-044>046-048>051-172015-
/O.EXP.KBOU.WC.W.0001.000000T0000Z-161217T1900Z/
NORTHEAST WELD COUNTY-MORGAN COUNTY-
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-
PHILLIPS COUNTY-
INCLUDING THE CITIES OF BRIGGSDALE, GROVER, PAWNEE BUTTES, 
RAYMER, STONEHAM, BRUSH, FORT MORGAN, GOODRICH, WIGGINS, BENNETT,
BYERS, DEER TRAIL, LEADER, AGATE, HUGO, LIMON, MATHESON, CROOK, 
MERINO, STERLING, PEETZ, AKRON, COPE, LAST CHANCE, OTIS, 
JULESBURG, OVID, SEDGWICK, AMHERST, HAXTUN, AND HOLYOKE
1207 PM MST SAT DEC 17 2016

...WIND CHILL WARNING HAS EXPIRED...

SLIGHT WARMING AND LIGHTER WINDS HAVE REDUCED THE RISK OF 
HYPOTHERMIA AND SERIOUS DAMAGE TO EXPOSED SKIN. WIND CHILLS 
SHOULD REMAIN ABOVE 15 BELOW ZERO FOR THE REMAINDER OF THE 
AFTERNOON. 

$$

COZ038-040-041-043-047-172015-
/O.EXP.KBOU.WC.Y.0002.000000T0000Z-161217T1900Z/
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND
ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-
ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-
CENTRAL AND SOUTH WELD COUNTY-
SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY-
INCLUDING THE CITIES OF FORT COLLINS, HEREFORD, LOVELAND, NUNN, 
AURORA, BRIGHTON, CITY OF DENVER, DENVER INTERNATIONAL AIRPORT, 
HIGHLANDS RANCH, LITTLETON, PARKER, CASTLE ROCK, ELBERT, FONDIS, 
KIOWA, LARKSPUR, EATON, FORT LUPTON, GREELEY, ROGGEN, FORDER, 
KARVAL, KUTCH, AND PUNKIN CENTER
1207 PM MST SAT DEC 17 2016

...WIND CHILL ADVISORY HAS EXPIRED...

SLIGHT WARMING AND LIGHTER WINDS HAVE REDUCED THE RISK OF 
HYPOTHERMIA AND SERIOUS DAMAGE TO EXPOSED SKIN. WIND CHILLS 
SHOULD REMAIN ABOVE 15 BELOW ZERO FOR THE REMAINDER OF THE 
AFTERNOON. 

$$
BAKER

What forecasters said that day

The local office's own words before this wind chill advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this wind chill advisory went out at Dec 16, 10:47 AM MST, 2 hours 11 minutes earlier.

Area forecast discussion, Dec 16, 10:47 AM MST, 2 hours 11 minutes before
Area Forecast Discussion
National Weather Service Denver/Boulder CO
1047 AM MST Fri Dec 16 2016

.UPDATE...
Issued at 1045 AM MST Fri Dec 16 2016

The arctic air has arrived. The arctic front backed into the
Denver area before 7 AM MST this morning on gusty northeast winds.
Temperatures plunged some 15-20 deg f in under 20 mins with its
arrival. At the present time...plains arctic airmass is quite
shallow...ranging from around 3500 feet deep near the northeast
corner to barely a few hundred feet along the base of the
foothills. Only now is the arctic air sweeping up the north side
of the Palmer Divide into the Castle Rock-Elizabeth areas.
However...the mesoscale models show the arctic air backing off
the Palmer Divide next few hours will a resurgence of warmer and
drier w-swly downslope winds off the foothills. Do not see that
happening at lower elevations north of there where low
stratocumulus clouds may linger off and on throughout the day.
Can't rule out a few intermittent flurries from this shallow cloud
desk...but nothing of consequence. As for temperatures on the
plains...see little to no change in current readings over the next
several hours with readings likely to hoover in the teens and
lower 20s.

in the high country...after a short lull in snowfall earlier this
morning...the snowfall has returned and intensity continues to
increase as the next push of moist maritime air spreads in from
the west. Regional radar network indicates an expanding area of
snowfall over northwest and west central Colorado and based on its
forward speed...only a matter of time before our high country
becomes fully engulfed by this snow field. CDOT and other cams
already indicating increasing snowfall on western fringe of the
CWA as well as up along the Continental Divide. In addition...
models indicate a steady increase in 700-500 mb w-swly winds with
50-60kt wly winds at 550 mb after 18z today. That said...with
intensifying snowfall and gusty winds in the 30-45kt range will
probably generate areas of blowing and drifting snow...especially
on the mtn passes and up around the Eisenhower Tunnel. Driving
conditions are likely the deteriorate throughout the afternoon as
snowfall rates on the higher west slopes could approach 2-2.5
inches per hour later this afternoon.

Changes to winds and temperatures of the plains...and daytime snow
coverage in the high country have been made to the grids and
published forecast.

&&

.SHORT TERM...(Today and tonight)
Issued at 408 AM MST Fri Dec 16 2016

Forecast is looking on track this morning. There has been
significant snow in the Park Range, Grand Mesa, and the West Elks
the past few hours, and this will be spreading into Summit county
and the Front Range over the next several hours. The strongest
winds have shifted south a bit with decreasing speeds over most of
our mountains. Just some minor adjustments at this time, mainly
centered around the edge of the warm air in the westerly flow over
the southern part of our area and the incoming cold air from the
north. As usual the models are struggling to resolve the gradient,
and the colder air should spread in faster than modeled. There are
east to northeast winds in the models all day without shifting the
gradient much. Expect that the reality will be a maintenance of
the current temperature and wind pattern with some increase in
speeds this morning, then the colder temperatures will push
southward this afternoon with significant cooling across all of
the plains. Meanwhile, the mountains will remain in the mild and
very moist westerly flow. Still some question about the expected
impact in the lower elevations of Grand and Jackson counties.
These areas will probably have mostly snow, but the Kremmling area
is still in the lower 40s and that may not change while the rest
of those valleys may be warm enough to forestall accumulation.
These places may wind up needing advisories, but they may go from
mild and windy to colder with more snow but light winds.

The upper trough comes through with a deeper push of cold air
during the night. Models remain quite consistent with a solid snow
band along the trough axis, producing a couple inches of snow
across the plains. Mountain snow will be lighter overall with
less wind and moisture and a more northwest component, but there
is still strong cooling and places favored in northwest flow
could still do pretty well with low density fluffy snow. The
existing warning has this covered well.

There will still be some wind overnight with the coldest air
arriving, so we will likely need wind chill highlights for later
tonight into Saturday morning.

.LONG TERM...(Saturday through Thursday)
Issued at 408 AM MST Fri Dec 16 2016

Models have an upper trough move across Colorado on Saturday with
another weaker one to move across late Saturday night into Sunday
morning. There is weaker zonal flow aloft for the rest of Sunday.
Another weak upper trough moves in Sunday evening, with north and
northwesterly flow aloft by 12Z Monday. The QG Omega fields have
upward motion for the CWA Saturday morning, then downward energy
is over the forecast area through Sunday night. The boundary layer
flow is northerly upslope on Saturday. It is weak Saturday
evening, then weak drainage is progged overnight. winds will be
weak and variable on Sunday with weak drainage again Sunday
night. Cross sections show fairly deep deep moisture over all the
CWA Saturday morning, but from 18Z-21Z it decreases significantly.
Models have shown this timing for several runs now. Saturday
evening is pretty clear, but there could be some high clouds to move
into the CWA after midnight. Sunday and Sunday night are quite
dry. The QPF fields have very limited amounts of measurable snow
for all the CWA Saturday morning. There is a tiny bit early
Saturday afternoon in the high mountains south of I-70. There is
nothing on the QPF fields after that until well into the extended
period. For pops, will start out with "likely"s or better at 12Z
Saturday morning than gradually get them down to nothing by
mid/late afternoon in all areas. Will remove mentions of blowing
snow over the high mountains and plains with expected winds
speeds to be pretty light across all the forecast area. For
temperatures, Saturday highs will be 14-24 C colder than today's
highs. Sunday's highs will warm up 3-8 C over Saturday's highs.
For the later days, Monday through Thursday, models have moderate
west and northwesterly flow aloft Monday into early Tuesday. By
Tuesday afternoon, the jet level speeds increase with another jet
maximum to move across the state Wednesday associated with a weak
upper trough. On Thursday, there is flat upper ridging over
Colorado. There is a little moisture and minor QPF in the high
mountains on Wednesday with the jet max and trough. Temperatures
look to be near of a tad above seasonal normals all four days.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 1045 AM MST Fri Dec 16 2016

Arctic air has reached the Denver area...arriving just before
1400z this morning. Low clouds and gusty northeast winds followed
the arrival of much colder air by about 30-40 mins. for the
remainder of the day...arctic air and scattered to broken low
cloud deck will remain in place in place for BJC and KDEN. Whereas
KAPA on higher terrain south of Denver may actually see the arctic
air to the east with intermittent intrusions of warmer and drier
air off the foothills. Could see intermittent snow flurries from
the low cloud deck but nothing in the way of accumulation.

Its overnight when the metro area will likely see its snow
accumulation...generally in the 2-4 inch range...with the greater
accumulations beneath snow bands radiating northeastward off the
foothills. Where these bands set up will be anyone's guess. The
snow forecast will be updated as these bands set up. Bottomline...
should see broken to overcast ILS cigs for the remainder of the
day at Denver area terminals. However could see a brief breakout
at KAPA should the downslope flow off the foothills develops as
mentioned above.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
Winter Storm Warning until 11 AM MST Saturday for COZ031-033-034.

&&

UPDATE...Baker
SHORT TERM...Gimmestad
LONG TERM...RJK
AVIATION...Baker
Hazardous weather outlook, Dec 16, 11:36 AM MST, 1 hour 22 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1136 AM MST FRI DEC 16 2016

COZ030>051-171845-
JACKSON COUNTY BELOW 9000 FEET-
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/
GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE
9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-
CENTRAL AND SOUTHEAST PARK COUNTY-
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND
ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-
ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-
NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY-
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-
SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY-
LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY-
1136 AM MST FRI DEC 16 2016

...WINTRY WEATHER FOR THE OUTLOOK AREA THROUGH SATURDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL
COLORADO.

.DAY ONE...TODAY AND TONIGHT

SNOWFALL WILL INCREASE IN THE HIGH COUNTRY THROUGH THE DAY AND
BECOME HEAVY AT TIMES THIS AFTERNOON AND OVERNIGHT. ACCUMULATIONS
BY LATE TONIGHT WILL RANGE FROM 6 TO 12 INCHES FOR MOST OF THE
MOUNTAIN AREAS...WITH UP TO TWO FEET UP ALONG THE CONTINENTAL
DIVIDE AND ON UPPER WEST FACING MOUNTAIN SLOPES. WINDS OF 20 TO
30 MPH WITH HIGHER GUSTS TO AROUND 55 MPH WILL PRODUCE BLOWING
AND DRIFTING SNOW IN THE HIGH COUNTRY. GUSTY NORTHERLY WINDS ON
THE PLAINS MAY ALSO PRODUCE AREAS OF BLOWING SNOW AS WELL AS
DANGEROUSLY COLD WIND CHILLS. THE MOUNTAIN VALLEYS AND FOOTHILLS
WILL SEE LIGHTER ACCUMULATIONS...WITH TOTALS ANYWHERE FROM 3 TO 8
INCHES BY SATURDAY MORNING. THE PLAINS WILL ALSO SEE LIGHT
ACCUMULATIONS WITH AMOUNTS RANGING FROM AN INCH OR TWO IN THE FAR
NORTHEAST CORNER TO UPWARDS OF 3 TO 6 INCHES NEAR THE FOOTHILLS
AND ON THE PALMER DIVIDE.

AN ARCTIC COLD FRONT WILL ALSO BRING MUCH COLDER TEMPERATURES TO
THE PLAINS TODAY WITH TEMPERATURES FALLING THROUGH THE DAY.
OVERNIGHT TEMPERATURES WILL BOTTOM OUT BELOW ZERO IN MOST AREAS
WITH WIND CHILLS WELL BELOW ZERO IN THE MOUNTAINS AND NORTHEAST
PLAINS.

THE WINTRY WEATHER WILL HAMPER TRAVEL AS MANY ROADS WILL BECOME
SNOW COVERED AND BLOWING SNOW MAY SIGNIFICANTLY REDUCE VISIBILITIES
PARTICULARLY OVER THE MOUNTAIN PASSES AND UP AROUND THE EISENHOWER
TUNNEL.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

LIGHT SNOW WILL CONTINUE EARLY SATURDAY MORNING BUT IT WILL DECREASE
FROM NORTH TO SOUTH ACROSS THE FORECAST AREA BY LATE MORNING.
THERE WILL BE A FEW LINGERING SNOW SHOWERS OVER THE HIGH
MOUNTAINS DURING THE AFTERNOON. ADDITIONAL ACCUMULATIONS WILL BE
UP TO 2 MORE INCHES OVER THE PLAINS AND UP TO 4 MORE INCHES OVER
THE MOUNTAINS. THE GREATER DENVER AREA COULD SEE UP TO ONE MORE
INCH.

DRY WEATHER IS EXPECTED THROUGH TUESDAY IN THE MOUNTAINS...AND
THROUGH THURSDAY OVER THE PLAINS. THERE WILL BE A CHANCE OF LIGHT
SNOW IN THE MOUNTAINS TUESDAY NIGHT AND WEDNESDAY.

AS FOR TEMPERATURES...AN ARCTIC AIRMASS WILL BE IN PLACE SATURDAY
AND SUNDAY. IT WILL MODERATE BY MONDAY AND TEMPERATURES WILL BE
NEAR OR A BIT ABOVE SEASONAL NORMALS MUCH OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

REPORTS OF SNOWFALL OR STRONG WINDS WILL BE APPRECIATED.

BAKER/ENTREKIN

Nearby

Wind Chill Advisories in Colorado, 2016Every wind chill advisory in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.