Alert archive / Colorado / Winter Storm Watches in 2017

Winter Storm Watch 2, NWS Denver/Boulder, CO

January 3, 20179 counties in Colorado

NWS Denver/Boulder, CO issued this winter storm watch at Jan 3, 2017, 3:08 PM MST for 9 counties in Colorado. It took effect at Jan 4, 2017, 11:00 AM MST. It was in force for .

The area

The counties it named.

The facts

Issued
Jan 3, 2017, 3:08 PM MST (22:08 UTC)
In effect from
Jan 4, 2017, 11:00 AM MST
Expired
Jan 4, 2017, 5:03 AM MST
In force
Issued by
NWS Denver/Boulder, CO

Counties Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Douglas County, CO, Gilpin County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Weld County, CO

The radar

The Denver radar (KFTG), 62 km from the middle of the area, began a volume at 22:09 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, 10.1 hours before the alert went out and 173 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 2017-01-03Temperature 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 2017-01-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 164 square meters per square second.1939587897117136156Sfc1 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
624 m above ground
0-6 km bulk shear
113 kt
0-1 km storm-relative helicity
164 m²/s²
0-3 km storm-relative helicity
430 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

854 
WWUS45 KBOU 032208
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
308 PM MST TUE JAN 3 2017

.PERIODS OF SNOW WILL CONTINUE IN THE MOUNTAINS THROUGH THURSDAY
WITH HEAVY SNOW AT TIMES TONIGHT THROUGH THURSDAY MORNING IN SOME
AREAS. HEAVY SNOW WILL ALSO DEVELOP IN AND NEAR THE FRONT RANGE
FOOTHILLS WEDNESDAY AFTERNOON AND CONTINUE INTO WEDNESDAY NIGHT. 
ACROSS NORTHEAST COLORADO SNOW WILL INCREASE NEAR THE WYOMING 
BORDER BY WEDNESDAY MORNING AND THEN SPREAD SOUTHWARD ACROSS THE 
FRONT RANGE BY AFTERNOON INTO WEDNESDAY EVENING. THERE IS SOME 
POTENTIAL FOR HEAVIER SNOW ALONG PORTIONS OF THE FRONT RANGE 
WEDNESDAY NIGHT. THE SNOW WILL CONTINUE INTO THURSDAY MORNING BUT 
SHOULD BEGIN TO DECREASE FROM NORTH TO SOUTH BY THURSDAY 
AFTERNOON.

COZ030-032-040615-
/O.UPG.KBOU.WS.A.0001.170104T1200Z-170105T1800Z/
/O.EXB.KBOU.WS.W.0001.170104T1200Z-170105T1800Z/
JACKSON COUNTY BELOW 9000 FEET-
GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-
INCLUDING THE CITIES OF GOULD, NORTH PARK, RAND, SPICER, WALDEN, 
DILLON, FRASER, GRANBY, GRAND LAKE, HOT SULPHUR SPRINGS, 
AND KREMMLING
308 PM MST TUE JAN 3 2017

...WINTER STORM WARNING IN EFFECT FROM 5 AM WEDNESDAY TO 11 AM
MST THURSDAY...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM
WARNING FOR SNOW, WHICH IS IN EFFECT FROM 5 AM WEDNESDAY TO 11 AM
MST THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT.

* TIMING...SNOW WILL INCREASE TONIGHT AND CONTINUE THROUGH 
THURSDAY MORNING. THE SNOW MAY BE HEAVY AT TIMES WEDNESDAY 
THROUGH WEDNESDAY NIGHT. 

* SNOW ACCUMULATIONS...6 TO 12 INCHES WITH LOCALLY HIGHER 
  AMOUNTS POSSIBLE. 

* WIND/VISIBILITY...WEST 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. 
  VISIBILITIES WILL BE REDUCED TO LESS THAN ONE QUARTER MILE 
  DURING THE PERIODS OF HEAVIER SNOWFALL AND BLOWING SNOW. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ035-040615-
/O.UPG.KBOU.WS.A.0001.170104T1200Z-170105T1800Z/
/O.EXB.KBOU.WS.W.0001.170104T1200Z-170105T1800Z/
LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-
INCLUDING THE CITIES OF ESTES PARK, GLENDEVEY, NEDERLAND, 
AND RED FEATHER LAKES
308 PM MST TUE JAN 3 2017

...WINTER STORM WARNING IN EFFECT FROM 5 AM WEDNESDAY TO 11 AM
MST THURSDAY...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM
WARNING FOR SNOW, WHICH IS IN EFFECT FROM 5 AM WEDNESDAY TO 11 AM
MST THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT.

* TIMING...SNOW WILL INCREASE LATE TONIGHT AND CONTINUE THROUGH 
  THURSDAY MORNING. THE SNOW MAY BE HEAVY AT TIMES WEDNESDAY 
  THROUGH WEDNESDAY NIGHT. 

* SNOW ACCUMULATIONS...8 TO 16 INCHES.

* WIND/VISIBILITY...WEST 10 TO 20 MPH IN THE MORNING BECOMING
  NORTHEAST 10 TO 20 MPH IN THE AFTERNOON. VISIBILITIES WILL BE
  REDUCED TO LESS THAN ONE QUARTER MILE DURING THE PERIODS OF
  HEAVIER SNOWFALL. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ034-040615-
/O.UPG.KBOU.WS.A.0001.170104T1200Z-170106T0000Z/
/O.EXA.KBOU.WS.W.0001.170104T0100Z-170105T1800Z/
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 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
308 PM MST TUE JAN 3 2017

...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 11 AM
MST THURSDAY...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM
WARNING FOR SNOW AND BLOWING SNOW, WHICH IS IN EFFECT FROM 6 PM 
THIS EVENING TO 11 AM MST THURSDAY. THE WINTER STORM WATCH IS NO 
LONGER IN EFFECT. 

* TIMING...SNOW WILL INCREASE LATE TONIGHT AND CONTINUE THROUGH 
  THURSDAY. THE SNOW MAY BE HEAVY AT TIMES WEDNESDAY THROUGH 
  THURSDAY MORNING. 

* SNOW ACCUMULATIONS...10 TO 20 INCHES.

* WIND/VISIBILITY...WEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. 
  VISIBILITIES WILL BE REDUCED TO LESS THAN ONE QUARTER MILE 
  DURING THE PERIODS OF HEAVIER SNOWFALL AND BLOWING SNOW. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ031-033-040615-
/O.CON.KBOU.WS.W.0001.170104T0100Z-170105T1800Z/
/O.CON.KBOU.WW.Y.0001.000000T0000Z-170104T0100Z/
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER 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, AND WILLOW CREEK PASS
308 PM MST TUE JAN 3 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MST THIS
EVENING...
...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING
TO 11 AM MST THURSDAY...

* TIMING...LIGHT TO MODERATE SNOW WILL CONTINUE THIS AFTERNOON,
  THEN INCREASE TONIGHT WITH LOCALLY HEAVIER BANDS OF SNOW
  CONTINUING THROUGH EARLY THURSDAY.

* SNOW ACCUMULATIONS...12 TO 24 INCHES WITH LOCALLY HIGHER 
  AMOUNTS POSSIBLE. 

* WIND/VISIBILITY...WEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. 
  VISIBILITIES WILL BE REDUCED TO LESS THAN ONE QUARTER MILE 
  DURING THE PERIODS OF HEAVIER SNOWFALL AND BLOWING SNOW. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW 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.

&&

$$

COZ036-038-039-040615-
/O.NEW.KBOU.WS.A.0002.170104T1800Z-170106T0000Z/
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
INCLUDING THE CITIES OF BAILEY, CENTRAL CITY, EVERGREEN, 
GEORGETOWN, IDAHO SPRINGS, WESTCREEK, FORT COLLINS, HEREFORD, 
LOVELAND, NUNN, ARVADA, BOULDER, GOLDEN, LAKEWOOD, AND LONGMONT
308 PM MST TUE JAN 3 2017

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH
THURSDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM
WATCH, WHICH IS IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY
AFTERNOON. 

* TIMING...SNOW WILL BY LATE WEDNESDAY MORNING BECOMING HEAVY AT
  TIMES WEDNESDAY NIGHT.

* SNOW ACCUMULATIONS...6 TO 12 INCHES.

* WIND/VISIBILITY...NORTHEAST WINDS 10 TO 20 MPH. VISIBILITIES
  WILL BE REDUCED TO LESS THAN ONE QUARTER MILE DURING THE PERIODS
  OF HEAVIER SNOWFALL. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED ROADS
  AND POOR VISIBILITY ESPECIALLY DURING THE COMMUTES WEDNESDAY
  EVENING AND THURSDAY MORNING.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.

&&

$$
4 follow-up statements
282 
WWUS45 KBOU 040102
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
602 PM MST TUE JAN 3 2017

.PERIODS OF SNOW WILL CONTINUE IN THE MOUNTAINS THROUGH THURSDAY
WITH HEAVY SNOW AT TIMES TONIGHT THROUGH THURSDAY MORNING IN SOME
AREAS. HEAVY SNOW WILL ALSO DEVELOP IN AND NEAR THE FRONT RANGE
FOOTHILLS WEDNESDAY AFTERNOON AND CONTINUE INTO WEDNESDAY NIGHT.
ACROSS NORTHEAST COLORADO SNOW WILL INCREASE NEAR THE WYOMING
BORDER BY WEDNESDAY MORNING AND THEN SPREAD SOUTHWARD ACROSS THE
FRONT RANGE BY AFTERNOON INTO WEDNESDAY EVENING. THERE IS SOME
POTENTIAL FOR HEAVIER SNOW ALONG PORTIONS OF THE FRONT RANGE
WEDNESDAY NIGHT. THE SNOW WILL CONTINUE INTO THURSDAY MORNING BUT
SHOULD BEGIN TO DECREASE FROM NORTH TO SOUTH BY THURSDAY
AFTERNOON.

COZ031-033-040915-
/O.EXP.KBOU.WW.Y.0001.000000T0000Z-170104T0100Z/
/O.CON.KBOU.WS.W.0001.000000T0000Z-170105T1800Z/
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER 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, AND WILLOW CREEK PASS
602 PM MST TUE JAN 3 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...
...WINTER WEATHER ADVISORY HAS EXPIRED...

* TIMING...LIGHT TO MODERATE SNOW WILL CONTINUE THIS EVENING, 
THEN INCREASE LATER TONIGHT WITH LOCALLY HEAVIER BANDS OF SNOW 
CONTINUING THROUGH EARLY THURSDAY. 

* SNOW ACCUMULATIONS...12 TO 24 INCHES WITH LOCALLY HIGHER 
  AMOUNTS POSSIBLE. 

* WIND/VISIBILITY...WEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. 
  VISIBILITIES WILL BE REDUCED TO LESS THAN ONE QUARTER MILE 
  DURING THE PERIODS OF HEAVIER SNOWFALL AND BLOWING SNOW. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW 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.


&&

$$

COZ034-040915-
/O.CON.KBOU.WS.W.0001.000000T0000Z-170105T1800Z/
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 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 PM MST TUE JAN 3 2017

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

* TIMING...SNOW WILL INCREASE LATE TONIGHT AND CONTINUE THROUGH 
  THURSDAY. THE SNOW MAY BE HEAVY AT TIMES WEDNESDAY THROUGH 
  THURSDAY MORNING. 

* SNOW ACCUMULATIONS...10 TO 20 INCHES.

* WIND/VISIBILITY...WEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. 
  VISIBILITIES WILL BE REDUCED TO LESS THAN ONE QUARTER MILE 
  DURING THE PERIODS OF HEAVIER SNOWFALL AND BLOWING SNOW. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ030-032-040915-
/O.CON.KBOU.WS.W.0001.170104T1200Z-170105T1800Z/
JACKSON COUNTY BELOW 9000 FEET-
GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-
INCLUDING THE CITIES OF GOULD, NORTH PARK, RAND, SPICER, WALDEN, 
DILLON, FRASER, GRANBY, GRAND LAKE, HOT SULPHUR SPRINGS, 
AND KREMMLING
602 PM MST TUE JAN 3 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM WEDNESDAY TO
11 AM MST THURSDAY...

* TIMING...SNOW WILL INCREASE TONIGHT AND CONTINUE THROUGH 
  THURSDAY MORNING. THE SNOW MAY BE HEAVY AT TIMES WEDNESDAY 
  THROUGH WEDNESDAY NIGHT.

* SNOW ACCUMULATIONS...6 TO 12 INCHES WITH LOCALLY HIGHER 
  AMOUNTS POSSIBLE. 

* WIND/VISIBILITY...WEST 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. 
  VISIBILITIES WILL BE REDUCED TO LESS THAN ONE QUARTER MILE 
  DURING THE PERIODS OF HEAVIER SNOWFALL AND BLOWING SNOW. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ035-040915-
/O.CON.KBOU.WS.W.0001.170104T1200Z-170105T1800Z/
LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-
INCLUDING THE CITIES OF ESTES PARK, GLENDEVEY, NEDERLAND, 
AND RED FEATHER LAKES
602 PM MST TUE JAN 3 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM WEDNESDAY TO
11 AM MST THURSDAY...

* TIMING...SNOW WILL INCREASE LATE TONIGHT AND CONTINUE THROUGH 
  THURSDAY MORNING. THE SNOW MAY BE HEAVY AT TIMES WEDNESDAY 
  THROUGH WEDNESDAY NIGHT. 

* SNOW ACCUMULATIONS...8 TO 16 INCHES.

* WIND/VISIBILITY...WEST 10 TO 20 MPH IN THE MORNING BECOMING 
  NORTHEAST 10 TO 20 MPH IN THE AFTERNOON. VISIBILITIES WILL BE 
  REDUCED TO LESS THAN ONE QUARTER MILE DURING THE PERIODS OF 
  HEAVIER SNOWFALL. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ036-038-039-040915-
/O.CON.KBOU.WS.A.0002.170104T1800Z-170106T0000Z/
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
INCLUDING THE CITIES OF BAILEY, CENTRAL CITY, EVERGREEN, 
GEORGETOWN, IDAHO SPRINGS, WESTCREEK, FORT COLLINS, HEREFORD, 
LOVELAND, NUNN, ARVADA, BOULDER, GOLDEN, LAKEWOOD, AND LONGMONT
602 PM MST TUE JAN 3 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH THURSDAY AFTERNOON...

* TIMING...SNOW WILL BY LATE WEDNESDAY MORNING BECOMING HEAVY AT 
  TIMES WEDNESDAY NIGHT. 

* SNOW ACCUMULATIONS...6 TO 12 INCHES.

* WIND/VISIBILITY...NORTHEAST WINDS 10 TO 20 MPH. VISIBILITIES 
  WILL BE REDUCED TO LESS THAN ONE QUARTER MILE DURING THE 
  PERIODS OF HEAVIER SNOWFALL. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY ESPECIALLY DURING THE COMMUTES 
  WEDNESDAY EVENING AND THURSDAY MORNING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.

&&

$$
291 
WWUS45 KBOU 040251
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
751 PM MST TUE JAN 3 2017

.LIGHT SNOW WILL BECOME MORE WIDESPREAD AGAIN IN THE MOUNTAINS
LATER TONIGHT WITH HEAVY SNOW POSSIBLE AT TIMES WEDNESDAY THROUGH
THURSDAY MORNING. HEAVY SNOW WILL ALSO DEVELOP IN AND NEAR THE 
FRONT RANGE FOOTHILLS WEDNESDAY AFTERNOON AND CONTINUE INTO 
WEDNESDAY NIGHT. ACROSS NORTHEAST COLORADO...SNOW WILL INCREASE 
NEAR THE WYOMING BORDER BY WEDNESDAY MORNING AND THEN SPREAD 
SOUTHWARD ACROSS THE FRONT RANGE BY AFTERNOON INTO WEDNESDAY 
EVENING. THERE IS SOME POTENTIAL FOR HEAVIER SNOW ALONG PORTIONS 
OF THE FRONT RANGE WEDNESDAY NIGHT. THE SNOW WILL CONTINUE INTO 
THURSDAY MORNING BUT SHOULD BEGIN TO DECREASE FROM NORTH TO SOUTH 
BY THURSDAY AFTERNOON.

COZ031-033-034-041100-
/O.CON.KBOU.WS.W.0001.000000T0000Z-170105T1800Z/
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
751 PM MST TUE JAN 3 2017

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

* TIMING...SNOW WILL INCREASE LATE TONIGHT AND CONTINUE THROUGH 
  THURSDAY. THE SNOW MAY BE HEAVY AT TIMES WEDNESDAY THROUGH 
  THURSDAY MORNING. 

* SNOW ACCUMULATIONS...10 TO 20 INCHES.

* WIND/VISIBILITY...WEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. 
  VISIBILITIES WILL BE REDUCED TO LESS THAN ONE QUARTER MILE 
  DURING THE PERIODS OF HEAVIER SNOWFALL AND BLOWING SNOW. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ030-032-041100-
/O.CON.KBOU.WS.W.0001.170104T1200Z-170105T1800Z/
JACKSON COUNTY BELOW 9000 FEET-
GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-
INCLUDING THE CITIES OF GOULD, NORTH PARK, RAND, SPICER, WALDEN, 
DILLON, FRASER, GRANBY, GRAND LAKE, HOT SULPHUR SPRINGS, 
AND KREMMLING
751 PM MST TUE JAN 3 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM WEDNESDAY TO
11 AM MST THURSDAY...

* TIMING...SNOW WILL INCREASE LATER TONIGHT AND CONTINUE THROUGH 
  THURSDAY MORNING. THE SNOW MAY BE HEAVY AT TIMES WEDNESDAY 
  THROUGH WEDNESDAY NIGHT. 

* SNOW ACCUMULATIONS...6 TO 12 INCHES WITH LOCALLY HIGHER 
  AMOUNTS POSSIBLE. 

* WIND/VISIBILITY...WEST 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. 
  VISIBILITIES WILL BE REDUCED TO LESS THAN ONE QUARTER MILE 
  DURING THE PERIODS OF HEAVIER SNOWFALL AND BLOWING SNOW. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ035-041100-
/O.CON.KBOU.WS.W.0001.170104T1200Z-170105T1800Z/
LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-
INCLUDING THE CITIES OF ESTES PARK, GLENDEVEY, NEDERLAND, 
AND RED FEATHER LAKES
751 PM MST TUE JAN 3 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM WEDNESDAY TO
11 AM MST THURSDAY...

* TIMING...SNOW WILL INCREASE LATE TONIGHT AND CONTINUE THROUGH 
  THURSDAY MORNING. THE SNOW MAY BE HEAVY AT TIMES WEDNESDAY 
  THROUGH WEDNESDAY NIGHT. 

* SNOW ACCUMULATIONS...8 TO 16 INCHES.

* WIND/VISIBILITY...WEST 10 TO 20 MPH IN THE MORNING BECOMING 
  NORTHEAST 10 TO 20 MPH IN THE AFTERNOON. VISIBILITIES WILL BE 
  REDUCED TO LESS THAN ONE QUARTER MILE DURING THE PERIODS OF 
  HEAVIER SNOWFALL. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ036-038-039-041100-
/O.CON.KBOU.WS.A.0002.170104T1800Z-170106T0000Z/
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
INCLUDING THE CITIES OF BAILEY, CENTRAL CITY, EVERGREEN, 
GEORGETOWN, IDAHO SPRINGS, WESTCREEK, FORT COLLINS, HEREFORD, 
LOVELAND, NUNN, ARVADA, BOULDER, GOLDEN, LAKEWOOD, AND LONGMONT
751 PM MST TUE JAN 3 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH THURSDAY AFTERNOON...

* TIMING...SNOW WILL DEVELOP BY LATE WEDNESDAY MORNING BECOMING 
HEAVY AT TIMES WEDNESDAY NIGHT. 

* SNOW ACCUMULATIONS...6 TO 12 INCHES.

* WIND/VISIBILITY...NORTHEAST WINDS 10 TO 20 MPH. VISIBILITIES 
  WILL BE REDUCED TO LESS THAN ONE QUARTER MILE DURING THE 
  PERIODS OF HEAVIER SNOWFALL. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY ESPECIALLY DURING THE COMMUTES 
  WEDNESDAY EVENING AND THURSDAY MORNING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.

&&

$$
251 
WWUS45 KBOU 040554
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1054 PM MST TUE JAN 3 2017

.LIGHT SNOW WILL BECOME MORE WIDESPREAD AGAIN IN THE MOUNTAINS
LATER TONIGHT WITH HEAVY SNOW POSSIBLE AT TIMES WEDNESDAY THROUGH
THURSDAY MORNING. HEAVY SNOW WILL ALSO DEVELOP IN AND NEAR THE
FRONT RANGE FOOTHILLS WEDNESDAY AFTERNOON AND CONTINUE INTO
WEDNESDAY NIGHT. 

ACROSS NORTHEAST COLORADO...SNOW WILL INCREASE NEAR THE WYOMING 
BORDER BY WEDNESDAY MORNING AND THEN SPREAD SOUTHWARD ACROSS THE 
FRONT RANGE BY AFTERNOON INTO WEDNESDAY EVENING. THERE IS SOME 
POTENTIAL FOR HEAVIER SNOW ALONG PORTIONS OF THE FRONT RANGE 
WEDNESDAY NIGHT. THE SNOW WILL DECREASE FROM NORTH TO SOUTH 
THURSDAY AFTERNOON.

COZ031-033-034-041400-
/O.CON.KBOU.WS.W.0001.000000T0000Z-170105T1800Z/
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
1054 PM MST TUE JAN 3 2017

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

* TIMING...SNOW WILL INCREASE LATE TONIGHT AND CONTINUE THROUGH 
  THURSDAY. THE SNOW MAY BE HEAVY AT TIMES WEDNESDAY THROUGH 
  THURSDAY MORNING. 

* SNOW ACCUMULATIONS...10 TO 20 INCHES.

* WIND/VISIBILITY...WEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. 
  VISIBILITIES WILL BE REDUCED TO LESS THAN ONE QUARTER MILE 
  DURING THE PERIODS OF HEAVIER SNOWFALL AND BLOWING SNOW. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ030-032-041400-
/O.CON.KBOU.WS.W.0001.170104T1200Z-170105T1800Z/
JACKSON COUNTY BELOW 9000 FEET-
GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-
INCLUDING THE CITIES OF GOULD, NORTH PARK, RAND, SPICER, WALDEN, 
DILLON, FRASER, GRANBY, GRAND LAKE, HOT SULPHUR SPRINGS, 
AND KREMMLING
1054 PM MST TUE JAN 3 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM WEDNESDAY TO
11 AM MST THURSDAY...

* TIMING...SNOW WILL INCREASE LATER TONIGHT AND CONTINUE THROUGH 
  THURSDAY MORNING. THE SNOW MAY BE HEAVY AT TIMES WEDNESDAY 
  THROUGH WEDNESDAY NIGHT. 

* SNOW ACCUMULATIONS...6 TO 12 INCHES WITH LOCALLY HIGHER 
  AMOUNTS POSSIBLE. 

* WIND/VISIBILITY...WEST 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. 
  VISIBILITIES WILL BE REDUCED TO LESS THAN ONE QUARTER MILE 
  DURING THE PERIODS OF HEAVIER SNOWFALL AND BLOWING SNOW. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ035-041400-
/O.CON.KBOU.WS.W.0001.170104T1200Z-170105T1800Z/
LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-
INCLUDING THE CITIES OF ESTES PARK, GLENDEVEY, NEDERLAND, 
AND RED FEATHER LAKES
1054 PM MST TUE JAN 3 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM WEDNESDAY TO
11 AM MST THURSDAY...

* TIMING...SNOW WILL INCREASE LATE TONIGHT AND CONTINUE THROUGH 
  THURSDAY MORNING. THE SNOW MAY BE HEAVY AT TIMES WEDNESDAY 
  THROUGH WEDNESDAY NIGHT. 

* SNOW ACCUMULATIONS...8 TO 16 INCHES.

* WIND/VISIBILITY...WEST 10 TO 20 MPH IN THE MORNING BECOMING 
  NORTHEAST 10 TO 20 MPH IN THE AFTERNOON. VISIBILITIES WILL BE 
  REDUCED TO LESS THAN ONE QUARTER MILE DURING THE PERIODS OF 
  HEAVIER SNOWFALL. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ036-038-039-041400-
/O.CON.KBOU.WS.A.0002.170104T1800Z-170106T0000Z/
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
INCLUDING THE CITIES OF BAILEY, CENTRAL CITY, EVERGREEN, 
GEORGETOWN, IDAHO SPRINGS, WESTCREEK, FORT COLLINS, HEREFORD, 
LOVELAND, NUNN, ARVADA, BOULDER, GOLDEN, LAKEWOOD, AND LONGMONT
1054 PM MST TUE JAN 3 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH THURSDAY AFTERNOON...

* TIMING...SNOW WILL DEVELOP BY LATE WEDNESDAY MORNING BECOMING 
  HEAVY AT TIMES WEDNESDAY NIGHT.

* SNOW ACCUMULATIONS...6 TO 12 INCHES.

* WIND/VISIBILITY...NORTHEAST WINDS 10 TO 20 MPH. VISIBILITIES 
  WILL BE REDUCED TO LESS THAN ONE QUARTER MILE DURING THE 
  PERIODS OF HEAVIER SNOWFALL. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY ESPECIALLY DURING THE COMMUTES 
  WEDNESDAY EVENING AND THURSDAY MORNING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.

&&

$$
092 
WWUS45 KBOU 041203
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
503 AM MST WED JAN 4 2017

.MOISTURE LEVELS OVER COLORADO WILL BE INCREASING TODAY AS A
STRONG PACIFIC STORM SYSTEM APPROACHES THE STATE FROM THE WEST.
MOUNTAIN AREAS WILL CONTINUE RECEIVING SNOWFALL TODAY, WHICH COULD
BECOME HEAVY AT TIMES LATER THIS AFTERNOON AND TONIGHT. HEAVY 
SNOW WILL ALSO DEVELOP OVER AND NEAR THE FRONT RANGE FOOTHILLS 
THIS AFTERNOON AND CONTINUE OVERNIGHT.

ACROSS NORTHEAST COLORADO...SNOW WILL INCREASE NEAR THE WYOMING
BORDER LATER THIS MORNING AND THEN SPREAD SOUTHWARD ACROSS THE 
FRONT RANGE DURING THE AFTERNOON AND EVENING. THERE IS SOME 
POTENTIAL FOR HEAVIER SNOW ALONG PORTIONS OF THE FRONT RANGE 
TONIGHT. THE SNOW WILL DECREASE FROM NORTH TO SOUTH THURSDAY. 

COZ036-038-039-042015-
/O.UPG.KBOU.WS.A.0002.170104T1800Z-170106T0000Z/
/O.EXB.KBOU.WS.W.0001.170104T2100Z-170105T1800Z/
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
INCLUDING THE CITIES OF BAILEY, CENTRAL CITY, EVERGREEN, 
GEORGETOWN, IDAHO SPRINGS, WESTCREEK, FORT COLLINS, HEREFORD, 
LOVELAND, NUNN, ARVADA, BOULDER, GOLDEN, LAKEWOOD, AND LONGMONT
503 AM MST WED JAN 4 2017

...WINTER STORM WARNING IN EFFECT FROM 2 PM THIS AFTERNOON TO
11 AM MST THURSDAY...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM
WARNING FOR HEAVY SNOW, WHICH IS IN EFFECT FROM 2 PM THIS 
AFTERNOON TO 11 AM MST THURSDAY. THE WINTER STORM WATCH IS NO 
LONGER IN EFFECT.


* TIMING...SNOW WILL DEVELOP THIS AFTERNOON AND BECOME HEAVY AT
  TIMES TONIGHT. 

* SNOW ACCUMULATIONS...6 TO 10 INCHES...POSSIBLY UP TO 14 INCHES
  IN AND NEAR THE FOOTHILLS.

* WIND/VISIBILITY...NORTHEAST WINDS 10 TO 20 MPH. VISIBILITIES
  WILL BE REDUCED TO LESS THAN ONE QUARTER MILE DURING PERIODS OF
HEAVIER SNOWFALL. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED ROADS
  AND POOR VISIBILITY...ESPECIALLY DURING THE WEDNESDAY EVENING 
AND THURSDAY MORNING COMMUTES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW 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.

&&

$$

COZ040-041-043-042015-
/O.EXB.KBOU.WS.W.0001.170104T2100Z-170105T1800Z/
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 AURORA, BRIGHTON, CITY OF DENVER, 
DENVER INTERNATIONAL AIRPORT, HIGHLANDS RANCH, LITTLETON, PARKER,
CASTLE ROCK, ELBERT, FONDIS, KIOWA, LARKSPUR, EATON, FORT LUPTON,
GREELEY, AND ROGGEN
503 AM MST WED JAN 4 2017

...WINTER STORM WARNING IN EFFECT FROM 2 PM THIS AFTERNOON TO
11 AM MST THURSDAY...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM
WARNING FOR HEAVY SNOWFALL, WHICH IS IN EFFECT FROM 2 PM THIS 
AFTERNOON TO 11 AM MST THURSDAY. 

* TIMING...SNOW WILL DEVELOP LATE THIS AFTERNOON AND CONTINUE
  THROUGH THURSDAY MORNING. THE SNOW MAY BE HEAVY AT TIMES
  OVERNIGHT. 

* SNOW ACCUMULATIONS...8 TO 12 INCHES.

* WIND/VISIBILITY...WEST 10 TO 20 MPH IN THE MORNING BECOMING
  NORTHEAST 10 TO 15 MPH IN THE AFTERNOON. VISIBILITIES WILL BE
  REDUCED TO LESS THAN ONE QUARTER MILE DURING PERIODS OF HEAVIER
SNOWFALL. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW...
SLEET...AND ICE ARE EXPECTED OR OCCURRING. THIS WILL MAKE TRAVEL 
VERY HAZARDOUS.

&&

$$

COZ031-033-034-042015-
/O.CON.KBOU.WS.W.0001.000000T0000Z-170105T1800Z/
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
503 AM MST WED JAN 4 2017

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

* TIMING...SNOW WILL INCREASE TODAY AND CONTINUE THROUGH TONIGHT.
  THE SNOW MAY BE HEAVY AT TIMES. 

* SNOW ACCUMULATIONS...12 TO 18 INCHES.

* WIND/VISIBILITY...WEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH. 
  VISIBILITIES WILL BE REDUCED TO LESS THAN ONE QUARTER MILE 
  DURING THE PERIODS OF HEAVIER SNOWFALL AND BLOWING SNOW. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ030-032-042015-
/O.CON.KBOU.WS.W.0001.000000T0000Z-170105T1800Z/
JACKSON COUNTY BELOW 9000 FEET-
GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-
INCLUDING THE CITIES OF GOULD, NORTH PARK, RAND, SPICER, WALDEN, 
DILLON, FRASER, GRANBY, GRAND LAKE, HOT SULPHUR SPRINGS, 
AND KREMMLING
503 AM MST WED JAN 4 2017

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

* TIMING...SNOW WILL INCREASE TODAY AND CONTINUE THROUGH THURSDAY
  MORNING. THE SNOW MAY BE HEAVY AT TIMES THIS AFTERNOON AND TONIGHT.

* SNOW ACCUMULATIONS...8 TO 12 INCHES WITH LOCALLY HIGHER AMOUNTS
POSSIBLE. 

* WIND/VISIBILITY...WEST 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. 
  VISIBILITIES WILL BE REDUCED TO LESS THAN ONE QUARTER MILE 
  DURING THE PERIODS OF HEAVIER SNOWFALL AND BLOWING SNOW. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

COZ035-042015-
/O.CON.KBOU.WS.W.0001.000000T0000Z-170105T1800Z/
LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-
INCLUDING THE CITIES OF ESTES PARK, GLENDEVEY, NEDERLAND, 
AND RED FEATHER LAKES
503 AM MST WED JAN 4 2017

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

* TIMING...SNOW WILL INCREASE THROUGH TODAY AND CONTINUE
  OVERNIGHT. THE SNOW MAY BE HEAVY AT TIMES.

* SNOW ACCUMULATIONS...10 TO 16 INCHES.

* WIND/VISIBILITY...WEST 10 TO 20 MPH IN THE MORNING BECOMING 
  NORTHEAST 10 TO 20 MPH IN THE AFTERNOON. VISIBILITIES WILL BE 
  REDUCED TO LESS THAN ONE QUARTER MILE DURING THE PERIODS OF 
  HEAVIER SNOWFALL. 

* IMPACTS...TRAVEL WILL BECOME HAZARDOUS DUE TO SNOW COVERED 
  ROADS AND POOR VISIBILITY. IF TRAVELING INTO THE COLORADO HIGH 
  COUNTRY, BE SURE TO HAVE ADEQUATE SNOW TIRES AND ALLOW EXTRA 
  TIME TO REACH YOUR DESTINATION SAFELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

What forecasters said that day

The local office's own words before this winter storm watch 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 winter storm watch went out at Jan 3, 5:00 AM MST, 10 hours 8 minutes earlier.

Area forecast discussion, Jan 3, 5:00 AM MST, 10 hours 8 minutes before
Area Forecast Discussion
National Weather Service Denver/Boulder CO
500 AM MST Tue Jan 3 2017

.SHORT TERM...(Today and tonight)
Issued at 500 AM MST Tue Jan 3 2017

A band of light to moderate snow developed over southeastern
Larimer and northern Weld Counties around 1 AM this morning which
is still on the radar. One to 3 inches of snow has probably
fallen out of this feature already. An upper level jet over the
state helped to organize the band. Some parts of the mountains
have also received a few inches of snow, based on web camera data.
But several locations have also not received any snow. Radar data
from KGJX show quite a bit of moisture and potential instability
still upstream from us. With the upper level jet remaining over
the state through today, snow is expected to continue in the
mountain areas. Plains locations are expected to see a decrease in
snow through the morning, as model cross sections show a drier
airmass developing due to westerly flow and diurnally warming
temperatures being able to absorb the moisture coming in from the
west. At low levels, easterly flow will continue today across the
plains as high pressure builds over the central plains. As
mountains areas continue to receive snow today will let the Winter
Weather Advisory continue through its planned expiration at 6 PM
this evening. Additional Pacific moisture is expected to begin
moving into western and central Colorado later tonight which will
continue through Wednesday and into Thursday. Snowfall intensity
is expected to increase overnight with the arrival of this
moisture, and a Winter Storm Warning will go into effect at 6 PM.

Additional snowfall on the plains is not expected until sometime
later tomorrow. See below. Temperatures will be the other big
story over the next few days, as we remain below freezing today,
and drop to near zero overnight tonight.

.LONG TERM...(Wednesday through Monday)
Issued at 500 AM MST Tue Jan 3 2017

Rather complicated wx ptrn thru Thursday as abundant moisture in wnw
flow aloft moves across the area.  Position of upper level jet and
EPV from cross-sections show potential for extended period of banded
pcpn across the higher terrain Wed into early Thu with favorable
orographic flow. Thus could see several inches of snow in the
mtns and across portions of the higher valleys as well. Will keep
warnings going in the mtns north of I-70 through Thursday morning
with a watch south of I-70 for Wed into Thu and across the higher
valleys.

At lower elevations a secondary surge of colder air will move across
the plains Wed aftn into Wed night and enhance upslope flow in the
foothills and along the front range.  Meanwhile as mentioned above
with position of upper level jet and potential banding of pcpn nrn
foothills could see heavy snow especially Wed aftn into early Thu so
have issued a watch.  Along the front range snow will gradually
spread fm the WY border southward during the aftn and should cover
much of the area by Wed evening.  SREF Plume data and CIPS Guidance
show some potential for heavy snow along and west of I-25 from
Denver north to the WY border especially Wed night. Confidence is
not high enough to issue a watch at this point but advisory
amounts certainly look like a high probability across much of the
front range by early Thu. As for highs on Wed will have readings
only in the teens nr the WY-CO border with upper 20s to lower 30s
further south across the palmer divide.

On Thu an upper level trough will gradually spread sse across the
area as upslope component weakens.  Areas of snow will continue
across the higher terrain and along the front range Thu morning but
should gradually end fm north to south by aftn as drier air begins
to move into the area fm the north.  Highs on Thu will stay in the
teens across the plains and could be even colder if cloud cover
lingers thru the aftn. In fact latest ECMWF only has highs in the
single digits across nern CO.

For Thu night into early Fri there are some differences between the
ECMWF and GFS.  The ECMWF quickly ends pcpn in the mtns by Thu
evening as the upper level trough and associated drier air moves
south of the area. Meanwhile the GFS is slower with the upper
level trough and has snow continuing overnight into early Fri
along and south of I-70 in the mtns...srn foothills and palmer
divide. At this point would probably favor the ECMWF since the
Canadian also shows a similar solution so will trend towards lower
pops. As for highs on Fri with expected snow pack and inversions
models may be too optimistic with highs over nern CO which may
stay in the 15 to 20 range in those areas with snow cover.

By Fri night into Sat dry air in wnw flow aloft will be over the
area as cold sfc high pressure moves eastward.  Thus should see some
moderation in highs over nern CO with readings in the lower to mid
30s except 20s where inversions hold.  On Sun the flow aloft will
become more wly with some moisture embedded in the flow so will keep
in a slight chc of snow in the mtns with dry conditions
elsewhere. Warmer temps will occur over nern CO as downslope flow
occurs as readings rise into the 40s with lower 50s possible
around Denver.

For Mon the flow aloft will become more swly as an upper level ridge
builds across the srn Rockies.  Some moisture may be embedded in the
flow so wil leave in low pops in the mtns.  Temperatures over nern
CO will be in the 50s.

&&

.AVIATION...(For the 12Z TAFS through 12Z Wednesday morning)
Issued at 500 AM MST Tue Jan 3 2017

Light snow flurries that have developed in the shallow easterly
winds this morning will last for a few more hours. Flurries are
expected to end by mid morning with ceilings lifting through the
day. Ceilings will drop again tonight, but additional snow is not
expected until Wednesday afternoon.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory until 6 PM MST this evening for COZ031-
033.

Winter Storm Warning from 6 PM this evening to 11 AM MST
Thursday for COZ031-033.

Winter Storm Watch from late tonight through Thursday morning
for COZ030-032-035.

Winter Storm Watch from late tonight through Thursday afternoon
for COZ034.

&&

SHORT TERM...Dankers
LONG TERM...RPK
AVIATION...Dankers
Hazardous weather outlook, Jan 3, 5:46 AM MST, 9 hours 22 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
546 AM MST TUE JAN 3 2017

COZ030>051-041300-
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-
546 AM MST TUE JAN 3 2017

...WINTER STORM WARNING FOR THE MOUNTAINS NORTH OF I-70 TONIGHT
THROUGH THURSDAY MORNING...
...WINTER STORM WATCH FOR THE MOUNTAINS ALONG AND SOUTH OF I-70
LATE TONIGHT THROUGH THURSDAY AFTERNOON...
...WINTER STORM WATCH FOR THE HIGHER VALLEYS AND NORTHERN
FOOTHILLS FOR LATE TONIGHT THROUGH THURSDAY MORNING...

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

.DAY ONE...TODAY AND TONIGHT

COLD AIR ASSOCIATED WITH A CANADIAN COLD FRONT HAS MOVED INTO
NORTHERN COLORADO THIS MORNING. THIS WILL KEEP TEMPERATURES MUCH
COOLER THAN NORMAL TODAY AND TONIGHT. IN THE MOUNTAINS, PACIFIC
MOISTURE AND STRONG WESTERLY FLOW HAVE MOVED OVER THE REGION,
CAUSING LIGHT TO MODERATE SNOWFALL. MOISTURE LEVELS WILL BE
INCREASING FURTHER TONIGHT CAUSING SNOWFALL ACCUMULATIONS TO
INCREASE, ESPECIALLY TO THE NORTH OF THE I-70 CORRIDOR. SNOW
ACCUMULATIONS OF 2 TO 4 INCHES ARE EXPECTED TODAY WITH ANOTHER 3
TO 6 INCHES TONIGHT. MOUNTAIN TRAVEL MAY BE DIFFICULT TODAY AND
TONIGHT DUE TO SNOW-COVERED ROADS AND POOR VISIBILITY IN FALLING
SNOW. VARIOUS WINTER WEATHER ADVISORIES, WARNINGS AND WATCHES ARE
IN EFFECT FOR THE NEXT FEW DAYS.

ON THE PLAINS, A BAND OF SNOW ACROSS WELD AND MORGAN COUNTIES THIS
MORNING SHOULD DISSIPATE BY LATE THIS MORNING. AREAS UNDER THE
SNOW BAND MAY SEE A COUPLE INCHES OF ACCUMULATION BEFORE THE SNOW
BAND BREAKS APART. HIGH TEMPERATURES NEAR THE NORTHERN BORDER MAY
ONLY BE IN THE UPPER TEENS WHILE THE REST OF NORTHEAST COLORADO
TOP OUT IN THE LOWER AND MID 20S. OVERNIGHT LOWS ARE EXPECTED TO
BE IN THE LOWER SINGLE DIGITS ACROSS MOST OF THE PLAINS TONIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SNOW WILL CONTINUE IN THE MOUNTAINS AND HIGHER VALLEYS WEDNESDAY
THROUGH THURSDAY WITH PERIODS OF HEAVY SNOW AT TIMES. ADDITIONAL
ACCUMULATIONS WILL RANGE FROM 8 TO 16 INCHES WITH LOCALLY HIGHER
AMOUNTS POSSIBLE. THE HIGHER VALLEYS COULD SEE FROM 6 TO 12
INCHES OF SNOW. GUSTY WEST WINDS WILL PRODUCE AREAS OF BLOWING
SNOW AND POOR VISIBLITIES OVER THE HIGHER PASSES.

AT LOWER ELEVATIONS SNOW WILL INCREASE NEAR THE WYOMING BORDER
WEDNESDAY MORNING AND THEN SPREAD SOUTHWARD BY AFTERNOON AS
ANOTHER SHOT OF COLDER AIR MOVES ACROSS NORTHEAST COLORADO. HEAVY
SNOW MAY OCCUR IN THE NORTHERN FOOTHILLS WEDNESDAY AND WEDNESDAY
NIGHT WITH ACCUMULATIONS FROM 8 TO 16 INCHES POSSIBLE. THERE IS
ALSO SOME POTENTIAL FOR HEAVY SNOW ALONG THE FRONT RANGE FROM
DENVER NORTH TO THE WYOMING BORDER WEDNESDAY NIGHT.

SNOW WILL CONTINUE INTO THURSDAY MORNING BUT SHOULD BEGIN TO
DECREASE FROM NORTH TO SOUTH BY THURSDAY AFTERNOON. HOWEVER,
TEMPERATURES WILL BE WELL BELOW NORMAL. ON FRIDAY THERE WILL BE A
CHANCE OF LIGHT SNOW IN THE MOUNTAINS WITH ONLY A SLIGHT CHANCE AT
LOWER ELEVATIONS.

DRY CONDITIONS ALONG WITH A WARMING TREND ARE EXPECTED FOR THE
WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.

In the hours before

Local storm report, Jan 3, 9:22 AM MST, 5 hours 46 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
922 AM MST TUE JAN 03 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0900 AM     SNOW             1 NNE WESTMINSTER       39.89N 105.04W
01/03/2017  M1.0 INCH        ADAMS              CO   TRAINED SPOTTER

0900 AM     SNOW             1 ENE WINTER PARK       39.89N 105.76W
01/03/2017  M5.0 INCH        GRAND              CO   TRAINED SPOTTER

0900 AM     SNOW             N WILLIAMS FORK RESERVO 40.04N 106.20W
01/03/2017  M2.0 INCH        GRAND              CO   TRAINED SPOTTER

0824 AM     SNOW             2 SSE TABERNASH         39.95N 105.84W
01/03/2017  M3.0 INCH        GRAND              CO   TRAINED SPOTTER

0800 AM     SNOW             4 S MASONVILLE          40.43N 105.21W
01/03/2017  M3.0 INCH        LARIMER            CO   TRAINED SPOTTER

0739 AM     SNOW             FORT COLLINS            40.56N 105.07W
01/03/2017  M1.4 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             ESE ESTES PARK          40.37N 105.51W
01/03/2017  M4.8 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             7 E VIRGINIA DALE       40.97N 105.22W
01/03/2017  M3.1 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             6 NW GREELEY            40.48N 104.82W
01/03/2017  M1.0 INCH        WELD               CO   AMATEUR RADIO

0730 AM     SNOW             HYGIENE                 40.18N 105.17W
01/03/2017  M1.0 INCH        BOULDER            CO   AMATEUR RADIO

0730 AM     SNOW             7 S LYONS               40.12N 105.27W
01/03/2017  M1.0 INCH        BOULDER            CO   AMATEUR RADIO

0700 AM     HEAVY SNOW       3 WNW PINGREE PARK      40.58N 105.63W
01/03/2017  M9.3 INCH        LARIMER            CO   TRAINED SPOTTER

0600 AM     SNOW             1 N EVANS               40.39N 104.70W
01/03/2017  M1.8 INCH        WELD               CO   AMATEUR RADIO

0600 AM     SNOW             10 NE PAWNEE BUTTES     40.93N 103.87W
01/03/2017  M0.8 INCH        WELD               CO   TRAINED SPOTTER

&&

JK
Local storm report, Jan 3, 9:57 AM MST, 5 hours 11 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
957 AM MST TUE JAN 03 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0900 AM     SNOW             1 NNE WESTMINSTER       39.89N 105.04W
01/03/2017  M1.0 INCH        ADAMS              CO   TRAINED SPOTTER

0900 AM     SNOW             N WILLIAMS FORK RESERVO 40.04N 106.20W
01/03/2017  M2.0 INCH        GRAND              CO   TRAINED SPOTTER

0900 AM     SNOW             1 ENE WINTER PARK       39.89N 105.76W
01/03/2017  M5.0 INCH        GRAND              CO   TRAINED SPOTTER

0824 AM     SNOW             2 SSE TABERNASH         39.95N 105.84W
01/03/2017  M3.0 INCH        GRAND              CO   TRAINED SPOTTER

0800 AM     SNOW             4 S MASONVILLE          40.43N 105.21W
01/03/2017  M3.0 INCH        LARIMER            CO   TRAINED SPOTTER

0739 AM     SNOW             FORT COLLINS            40.56N 105.07W
01/03/2017  M1.4 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             7 S LYONS               40.12N 105.27W
01/03/2017  M1.0 INCH        BOULDER            CO   AMATEUR RADIO

0730 AM     SNOW             ESE ESTES PARK          40.37N 105.51W
01/03/2017  M4.8 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             7 E VIRGINIA DALE       40.97N 105.22W
01/03/2017  M3.1 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             6 NW GREELEY            40.48N 104.82W
01/03/2017  M1.0 INCH        WELD               CO   AMATEUR RADIO

0730 AM     SNOW             HYGIENE                 40.18N 105.17W
01/03/2017  M1.0 INCH        BOULDER            CO   AMATEUR RADIO

0700 AM     HEAVY SNOW       3 WNW PINGREE PARK      40.58N 105.63W
01/03/2017  M9.3 INCH        LARIMER            CO   TRAINED SPOTTER

0630 AM     SNOW             7 SE DRAKE              40.37N 105.24W
01/03/2017  M2.6 INCH        LARIMER            CO   TRAINED SPOTTER

0600 AM     SNOW             1 N EVANS               40.39N 104.70W
01/03/2017  M1.8 INCH        WELD               CO   AMATEUR RADIO

0600 AM     SNOW             10 NE PAWNEE BUTTES     40.93N 103.87W
01/03/2017  M0.8 INCH        WELD               CO   TRAINED SPOTTER

&&

JK
Local storm report, Jan 3, 10:04 AM MST, 5 hours 4 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
1004 AM MST TUE JAN 03 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1000 AM     HEAVY SNOW       1 N ESTES PARK          40.39N 105.52W
01/03/2017  M6.5 INCH        LARIMER            CO   TRAINED SPOTTER

0900 AM     SNOW             1 ENE WINTER PARK       39.89N 105.76W
01/03/2017  M5.0 INCH        GRAND              CO   TRAINED SPOTTER

0900 AM     SNOW             1 NNE WESTMINSTER       39.89N 105.04W
01/03/2017  M1.0 INCH        ADAMS              CO   TRAINED SPOTTER

0900 AM     SNOW             N WILLIAMS FORK RESERVO 40.04N 106.20W
01/03/2017  M2.0 INCH        GRAND              CO   TRAINED SPOTTER

0824 AM     SNOW             2 SSE TABERNASH         39.95N 105.84W
01/03/2017  M3.0 INCH        GRAND              CO   TRAINED SPOTTER

0800 AM     SNOW             4 S MASONVILLE          40.43N 105.21W
01/03/2017  M3.0 INCH        LARIMER            CO   TRAINED SPOTTER

0739 AM     SNOW             FORT COLLINS            40.56N 105.07W
01/03/2017  M1.4 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             ESE ESTES PARK          40.37N 105.51W
01/03/2017  M4.8 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             HYGIENE                 40.18N 105.17W
01/03/2017  M1.0 INCH        BOULDER            CO   AMATEUR RADIO

0730 AM     SNOW             7 E VIRGINIA DALE       40.97N 105.22W
01/03/2017  M3.1 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             7 S LYONS               40.12N 105.27W
01/03/2017  M1.0 INCH        BOULDER            CO   AMATEUR RADIO

0730 AM     SNOW             6 NW GREELEY            40.48N 104.82W
01/03/2017  M1.0 INCH        WELD               CO   AMATEUR RADIO

0700 AM     HEAVY SNOW       3 WNW PINGREE PARK      40.58N 105.63W
01/03/2017  M9.3 INCH        LARIMER            CO   TRAINED SPOTTER

0630 AM     SNOW             7 SE DRAKE              40.37N 105.24W
01/03/2017  M2.6 INCH        LARIMER            CO   TRAINED SPOTTER

0600 AM     SNOW             10 NE PAWNEE BUTTES     40.93N 103.87W
01/03/2017  M0.8 INCH        WELD               CO   TRAINED SPOTTER

0600 AM     SNOW             1 N EVANS               40.39N 104.70W
01/03/2017  M1.8 INCH        WELD               CO   AMATEUR RADIO

&&

JK
Local storm report, Jan 3, 10:23 AM MST, 4 hours 45 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
1023 AM MST TUE JAN 03 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1000 AM     HEAVY SNOW       1 N ESTES PARK          40.39N 105.52W
01/03/2017  M6.5 INCH        LARIMER            CO   TRAINED SPOTTER

0900 AM     SNOW             1 NNE WESTMINSTER       39.89N 105.04W
01/03/2017  M1.0 INCH        ADAMS              CO   TRAINED SPOTTER

0900 AM     SNOW             N WILLIAMS FORK RESERVO 40.04N 106.20W
01/03/2017  M2.0 INCH        GRAND              CO   TRAINED SPOTTER

0900 AM     SNOW             1 ENE WINTER PARK       39.89N 105.76W
01/03/2017  M5.0 INCH        GRAND              CO   TRAINED SPOTTER

0824 AM     SNOW             2 SSE TABERNASH         39.95N 105.84W
01/03/2017  M3.0 INCH        GRAND              CO   TRAINED SPOTTER

0800 AM     SNOW             4 S MASONVILLE          40.43N 105.21W
01/03/2017  M3.0 INCH        LARIMER            CO   TRAINED SPOTTER

0739 AM     SNOW             FORT COLLINS            40.56N 105.07W
01/03/2017  M1.4 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             6 NW GREELEY            40.48N 104.82W
01/03/2017  M1.0 INCH        WELD               CO   AMATEUR RADIO

0730 AM     SNOW             7 S LYONS               40.12N 105.27W
01/03/2017  M1.0 INCH        BOULDER            CO   AMATEUR RADIO

0730 AM     SNOW             7 E VIRGINIA DALE       40.97N 105.22W
01/03/2017  M3.1 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             ESE ESTES PARK          40.37N 105.51W
01/03/2017  M4.8 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             HYGIENE                 40.18N 105.17W
01/03/2017  M1.0 INCH        BOULDER            CO   AMATEUR RADIO

0700 AM     HEAVY SNOW       3 WNW PINGREE PARK      40.58N 105.63W
01/03/2017  M9.3 INCH        LARIMER            CO   TRAINED SPOTTER

0700 AM     SNOW             3 W STONEHAM            40.61N 103.74W
01/03/2017  M1.0 INCH        WELD               CO   PUBLIC

0630 AM     SNOW             7 SE DRAKE              40.37N 105.24W
01/03/2017  M2.6 INCH        LARIMER            CO   TRAINED SPOTTER

0600 AM     SNOW             10 NE PAWNEE BUTTES     40.93N 103.87W
01/03/2017  M0.8 INCH        WELD               CO   TRAINED SPOTTER

0600 AM     SNOW             1 N EVANS               40.39N 104.70W
01/03/2017  M1.8 INCH        WELD               CO   AMATEUR RADIO

1000 AM     SNOW             LOVELAND                40.42N 105.07W
01/03/2017  M2.5 INCH        LARIMER            CO   PUBLIC

0920 AM     SNOW             SW FORT COLLINS         40.56N 105.07W
01/03/2017  M2.0 INCH        LARIMER            CO   PUBLIC

&&

JK
Local storm report, Jan 3, 1:27 PM MST, 1 hour 41 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DENVER CO
127 PM MST TUE JAN 03 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0600 AM     SNOW             10 NE PAWNEE BUTTES     40.93N 103.87W
01/03/2017  M0.8 INCH        WELD               CO   TRAINED SPOTTER

0600 AM     SNOW             1 N EVANS               40.39N 104.70W
01/03/2017  M1.8 INCH        WELD               CO   AMATEUR RADIO

0630 AM     SNOW             7 SE DRAKE              40.37N 105.24W
01/03/2017  M2.6 INCH        LARIMER            CO   TRAINED SPOTTER

0700 AM     SNOW             2 ESE ALLENSPARK        40.19N 105.48W
01/03/2017  M4.0 INCH        BOULDER            CO   TRAINED SPOTTER

0700 AM     HEAVY SNOW       3 WNW PINGREE PARK      40.58N 105.63W
01/03/2017  M9.3 INCH        LARIMER            CO   TRAINED SPOTTER

0700 AM     SNOW             3 W STONEHAM            40.61N 103.74W
01/03/2017  M1.0 INCH        WELD               CO   PUBLIC

0730 AM     SNOW             ESE ESTES PARK          40.37N 105.51W
01/03/2017  M4.8 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             6 NW GREELEY            40.48N 104.82W
01/03/2017  M1.0 INCH        WELD               CO   AMATEUR RADIO

0730 AM     SNOW             7 E VIRGINIA DALE       40.97N 105.22W
01/03/2017  M3.1 INCH        LARIMER            CO   TRAINED SPOTTER

0730 AM     SNOW             7 S LYONS               40.12N 105.27W
01/03/2017  M1.0 INCH        BOULDER            CO   AMATEUR RADIO

0730 AM     SNOW             HYGIENE                 40.18N 105.17W
01/03/2017  M1.0 INCH        BOULDER            CO   AMATEUR RADIO

0739 AM     SNOW             FORT COLLINS            40.56N 105.07W
01/03/2017  M1.4 INCH        LARIMER            CO   TRAINED SPOTTER

0800 AM     SNOW             4 S MASONVILLE          40.43N 105.21W
01/03/2017  M3.0 INCH        LARIMER            CO   TRAINED SPOTTER

0824 AM     SNOW             2 SSE TABERNASH         39.95N 105.84W
01/03/2017  M3.0 INCH        GRAND              CO   TRAINED SPOTTER

0900 AM     SNOW             1 ENE WINTER PARK       39.89N 105.76W
01/03/2017  M5.0 INCH        GRAND              CO   TRAINED SPOTTER

0900 AM     SNOW             1 NNE WESTMINSTER       39.89N 105.04W
01/03/2017  M1.0 INCH        ADAMS              CO   TRAINED SPOTTER

0900 AM     SNOW             N WILLIAMS FORK RESERVO 40.04N 106.20W
01/03/2017  M2.0 INCH        GRAND              CO   TRAINED SPOTTER

0920 AM     SNOW             SW FORT COLLINS         40.56N 105.07W
01/03/2017  M2.0 INCH        LARIMER            CO   PUBLIC

1000 AM     SNOW             LOVELAND                40.42N 105.07W
01/03/2017  M2.5 INCH        LARIMER            CO   PUBLIC

1000 AM     HEAVY SNOW       1 N ESTES PARK          40.39N 105.52W
01/03/2017  M6.5 INCH        LARIMER            CO   TRAINED SPOTTER

1100 AM     SNOW             1 S LOVELAND            40.40N 105.07W
01/03/2017  M2.5 INCH        LARIMER            CO   TRAINED SPOTTER

0118 PM     SNOW             1 NW NIWOT              40.10N 105.17W
01/03/2017  M0.7 INCH        BOULDER            CO   TRAINED SPOTTER

&&

SCHLATTER

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 3, 5:08 AM MSTWinter Storm WatchBOUBoulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more10 hr
Jan 3, 5:08 AM MSTWinter Storm WarningBOUAdams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 10 more54 hr

Nearby

Winter Storm Watches in Colorado, 2017Every winter storm watch in 2017

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.