Winter Storm Warning 10, NWS Denver/Boulder, CO

708 
WWUS45 KBOU 102002
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
102 PM MST SAT DEC 10 2016

...HEAVY SNOWFALL AND BLOWING SNOW FOR THE NORTHERN COLORADO
MOUNTAINS THIS AFTERNOON THROUGH SUNDAY MORNING...

.A VERY MOIST WESTERLY FLOW ALOFT WILL PRODUCE HEAVY SNOW AND
STRONG WINDS IN THE HIGHER MOUNTAINS OF NORTHERN COLORADO THIS 
AFTERNOON THROUGH SUNDAY MORNING. THERE WILL ALSO BE SOME SNOW IN
THE VALLEYS OF GRAND AND JACKSON COUNTIES ALONG WITH ENOUGH WIND
TO CAUSE SOME DRIFTING. ROAD CONDITIONS ARE EXPECTED TO
DETERIORATE THIS AFTERNOON. IF YOU ARE PLANNING ON
TRAVELING...CHECK THE LATEST ROAD CONDITIONS AND ANY TRAVEL
RESTRICTIONS AND BE PREPARED FOR WINTER DRIVING CONDITIONS. THE
SNOW WILL DECREASE ON SUNDAY AFTERNOON WHICH SHOULD BRING SOME
IMPROVEMENT TO THE ROADS.

COZ031-033-034-110600-
/O.CON.KBOU.WS.W.0010.161210T2100Z-161211T1800Z/
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
102 PM MST SAT DEC 10 2016

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

* TIMING...SNOW WILL INCREASE OVER THE MOUNTAINS THIS AFTERNOON
  AND CONTINUE THROUGH SUNDAY MORNING. SNOW WILL BE HEAVY AT TIMES
  ESPECIALLY OVERNIGHT TONIGHT.

* SNOW ACCUMULATIONS...10 TO 20 INCHES...WITH UP TO 25 INCHES IN
  AREAS NORTH OF ROCKY MOUNTAIN NATIONAL PARK AND RABBIT EARS PASS.

* WIND/VISIBILITY...WEST WINDS 20 TO 40 MPH NEAR AND ABOVE 
  TIMBERLINE...WITH GUSTS TO 60 MPH OR MORE ON THE HIGH PASSES. 
  VISIBILITY MAY LOWER TO A COUPLE HUNDRED FEET AT TIMES ON THE 
  PASSES...AND AS LOW AS A QUARTER MILE AT TIMES ON LOWER 
  SLOPES. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND
  SLOW TRAVEL CONDITIONS ACROSS THE MOUNTAINS STARTING THIS
  AFTERNOON. THE WORST TRAVEL CONDITIONS ARE EXPECTED TONIGHT AND
  EARLY SUNDAY MORNING. TRAVEL RESTRICTIONS ARE LIKELY...AND ROAD
  CLOSURES ARE POSSIBLE.

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. CHECK ROAD
CONDITIONS BEFORE YOU GO. IF YOU MUST TRAVEL...KEEP AN EXTRA 
FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN 
EMERGENCY.

&&

$$

COZ030-032-110600-
/O.CON.KBOU.WW.Y.0027.161210T2100Z-161211T1800Z/
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
102 PM MST SAT DEC 10 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
SUNDAY...

* TIMING...SNOW WILL DEVELOP THIS AFTERNOON AND CONTINUE INTO 
SUNDAY MORNING. 

* SNOW ACCUMULATIONS...5 TO 10 INCHES.

* WIND/VISIBILITY...WEST 15 TO 25 MPH WITH GUSTS TO 35 MPH.
  VISIBILITIES WILL BE REDUCED TO ONE QUARTER MILE AT TIMES IN 
  SNOW AND BLOWING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND 
  SLOW TRAVEL CONDITIONS STARTING THIS AFTERNOON. THE WORST 
  TRAVEL CONDITIONS ARE EXPECTED TONIGHT AND EARLY SUNDAY 
  MORNING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND
BLOWING SNOW. USE CAUTION WHEN TRAVELING... ESPECIALLY IN OPEN
AREAS.

&&

$$

GIMMESTAD

646 
WWUS45 KBOU 110348
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
848 PM MST SAT DEC 10 2016

...HEAVY SNOWFALL AND BLOWING SNOW FOR THE NORTHERN COLORADO
MOUNTAINS LATER TONIGHT THROUGH SUNDAY MORNING...

.A VERY MOIST WESTERLY FLOW ALOFT WILL PRODUCE HEAVY SNOW AND
STRONG WINDS IN THE HIGHER MOUNTAINS OF NORTHERN COLORADO THROUGH
SUNDAY MORNING. SNOWFALL INTENSITIES HAVE DECREASED EARLY THIS
EVENING, BUT IS EXPECTED TO INCREASE AGAIN TOWARDS MIDNIGHT AND 
CONTINUE THROUGH THE MORNING HOURS. 

ROAD CONDITIONS WILL BE ICY AND SNOWPACKED OVER THE MOUNTAINS
TONIGHT. IF YOU ARE PLANNING ON TRAVELING... CHECK THE LATEST 
ROAD CONDITIONS AND ANY TRAVEL RESTRICTIONS AND BE PREPARED FOR 
WINTER DRIVING CONDITIONS. THE SNOW WILL DECREASE ON SUNDAY 
AFTERNOON WHICH SHOULD BRING SOME IMPROVEMENT TO THE ROADS.

COZ031-033-034-111200-
/O.CON.KBOU.WS.W.0010.000000T0000Z-161211T1800Z/
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
848 PM MST SAT DEC 10 2016

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

* TIMING...SNOW WILL INCREASE AGAIN OVER THE MOUNTAINS TOWARDS
   MIDNIGHT AND CONTINUE THROUGH SUNDAY MORNING. SNOW WILL BE 
   HEAVY AT TIMES ESPECIALLY OVERNIGHT TONIGHT. 

* SNOW ACCUMULATIONS...10 TO 20 INCHES...WITH UP TO 25 INCHES IN 
  AREAS NORTH OF ROCKY MOUNTAIN NATIONAL PARK AND RABBIT EARS 
  PASS. 

* WIND/VISIBILITY...WEST WINDS 20 TO 40 MPH NEAR AND ABOVE 
  TIMBERLINE...WITH GUSTS TO 60 MPH OR MORE ON THE HIGH PASSES. 
  VISIBILITY MAY LOWER TO A COUPLE HUNDRED FEET AT TIMES ON THE 
  PASSES...AND AS LOW AS A QUARTER MILE AT TIMES ON LOWER 
  SLOPES. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND
  SLOW TRAVEL CONDITIONS ACROSS THE MOUNTAINS. THE WORST TRAVEL
  CONDITIONS ARE EXPECTED FROM MIDNIGHT THROUGH EARLY SUNDAY
  MORNING. TRAVEL RESTRICTIONS ARE LIKELY...AND ROAD CLOSURES ARE POSSIBLE.

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. CHECK ROAD
CONDITIONS BEFORE YOU GO. IF YOU MUST TRAVEL...KEEP AN EXTRA
FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN
EMERGENCY.

&&

$$

COZ030-032-111200-
/O.CON.KBOU.WW.Y.0027.000000T0000Z-161211T1800Z/
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
848 PM MST SAT DEC 10 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
SUNDAY...

* TIMING...SNOW WILL INCREASE TOWARDS MIDNIGHT AND CONTINUE
  THROUGH SUNDAY MORNING. 

* SNOW ACCUMULATIONS...3 TO 7 INCHES.

* WIND/VISIBILITY...WEST 15 TO 25 MPH. VISIBILITIES WILL BE 
REDUCED TO ONE QUARTER MILE AT TIMES IN SNOW AND BLOWING SNOW. 

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND 
  SLOW TRAVEL CONDITIONS STARTING THIS AFTERNOON. THE WORST 
  TRAVEL CONDITIONS ARE EXPECTED TONIGHT AND EARLY SUNDAY 
  MORNING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND
BLOWING SNOW. USE CAUTION WHEN TRAVELING... ESPECIALLY IN OPEN
AREAS.

&&

$$

185 
WWUS45 KBOU 111206
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
506 AM MST SUN DEC 11 2016

...A FEW MORE HOURS OF MODERATE TO HEAVY SNOWFALL FOR THE 
NORTHERN COLORADO MOUNTAINS THIS MORNING...

.THE VERY MOIST WESTERLY FLOW ALOFT OVER COLORADO HAS BEEN
PRODUCING MODERATE TO HEAVY SNOW AND STRONG WINDS IN THE HIGHER 
MOUNTAINS OF NORTHERN COLORADO OVERNIGHT. THE BACK EDGE OF THE
WEATHER SYSTEM WILL BE MOVING OVER THE MOUNTAINS BY MID-MORNING
WHICH WILL CAUSE THE MODERATE TO HEAVY SNOWFALL TO COME TO AN END.
SCATTERED SNOW SHOWERS WILL CONTINUE THROUGH THE AFTERNOON...BUT
ONLY LIGHTER SNOW ACCUMULATIONS ARE EXPECTED AFTER 12 PM.  

ROAD CONDITIONS WILL BE ICY AND SNOWPACKED IN THE MOUNTAINS 
THIS MORNING. IF YOU ARE PLANNING ON TRAVELING...CHECK THE LATEST
ROAD CONDITIONS AND ANY TRAVEL RESTRICTIONS AND BE PREPARED FOR 
WINTER DRIVING CONDITIONS. THE DECREASE IN SNOW THROUGH THE 
AFTERNOON SHOULD BRING SOME IMPROVEMENT TO THE ROADS.

COZ031-033-034-111800-
/O.CON.KBOU.WS.W.0010.000000T0000Z-161211T1800Z/
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
506 AM MST SUN DEC 11 2016

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

* TIMING...MODERATE TO HEAVY SNOW WILL CONTINUE THROUGH ABOUT 10
  AM. SOME CLEARING AND A SHIFT TO SCATTERED SNOW SHOWERS WILL
  SPREAD FROM NORTH TO SOUTH THROUGH THE EARLY AFTERNOON. 

* SNOW ACCUMULATIONS...2 TO 5 INCHES ADDITIONAL ACCUMULATION THIS
MORNING.

* WIND/VISIBILITY...WEST WINDS 20 TO 40 MPH NEAR AND ABOVE 
  TIMBERLINE...WITH GUSTS TO 60 MPH OR MORE ON THE HIGH PASSES. 
  VISIBILITY MAY LOWER TO A COUPLE HUNDRED FEET AT TIMES ON THE 
  PASSES...AND AS LOW AS A QUARTER MILE AT TIMES ON LOWER 
  SLOPES. 

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

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. CHECK ROAD
CONDITIONS BEFORE YOU GO. IF YOU MUST TRAVEL...KEEP AN EXTRA
FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN
EMERGENCY.

&&

$$

COZ030-032-111800-
/O.CON.KBOU.WW.Y.0027.000000T0000Z-161211T1800Z/
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
506 AM MST SUN DEC 11 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* TIMING...SNOW WILL CONTINUE THROUGH MID-MORNING. 

* SNOW ACCUMULATIONS...1 TO 4 INCHES ADDITIONAL ACCUMULATION.

* WIND/VISIBILITY...WEST 15 TO 25 MPH. VISIBILITIES WILL BE 
  REDUCED TO ONE QUARTER MILE AT TIMES IN SNOW AND BLOWING SNOW.

* IMPACTS...THE SNOW AND BLOWING SNOW WILL PRODUCE HAZARDOUS AND
  SLOW TRAVEL CONDITIONS THIS MORNING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND
BLOWING SNOW. USE CAUTION WHEN TRAVELING... ESPECIALLY IN OPEN
AREAS.

&&

$$

192 
WWUS45 KBOU 111811
WSWBOU

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1111 AM MST SUN DEC 11 2016

COZ031-033-034-111915-
/O.EXP.KBOU.WS.W.0010.000000T0000Z-161211T1800Z/
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
1111 AM MST SUN DEC 11 2016

...WINTER STORM WARNING HAS EXPIRED...

SNOW HAS DECREASED TO SCATTERED SHOWERS. THERE WILL STILL BE SOME
LIGHT ACCUMULATION AND STRONG WINDS IN HIGHER MOUNTAIN AREAS, BUT
TRAVEL CONDITIONS SHOULD BEGIN TO IMPROVE.

$$

COZ030-032-111915-
/O.EXP.KBOU.WW.Y.0027.000000T0000Z-161211T1800Z/
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
1111 AM MST SUN DEC 11 2016

...WINTER WEATHER ADVISORY HAS EXPIRED...

SNOW HAS DECREASED TO SCATTERED SHOWERS. LITTLE OR NO ADDITIONAL
ACCUMULATION IS EXPECTED.

$$

GIMMESTAD

Area Forecast Discussion
National Weather Service Denver/Boulder CO
450 AM MST Sat Dec 10 2016

.SHORT TERM...(Today and tonight)
Issued at 450 AM MST Sat Dec 10 2016

Satellite imagery over the western United States shows the deep
moisture heading towards the central Rocky Mountains as strong
westerly flow aloft drives the storm our direction. The abundant
moisture and strong westerly flow are going to produce heavy
orographic snows in the mountains, beginning this afternoon and
continuing through Sunday. Snowfall will become heavy at times and
strong winds over higher elevations will produce poor visibilities
due to blowing snow. will be upgrading the Winter Storm Watch to a
Winter Storm Warning. Snow amounts of 1 to 2 feet are going to be
possible as the storm passes. Will also issue a Winter Weather
Advisory for North Park and Middle Park, for snow amounts of 6 to
10 inches in those high mountain valleys.

On the plains, conditions will remain dry through this evening due
to the strong westerly flow pattern aloft. Some showers may move
across the plains later tonight, but precipitation amounts will be
limited by the dry conditions at low levels. Precipitation may
begin as rain or a mix of rain and snow in the evening, but then
change over to snow by midnight due to evaporative cooling
effects. Temperatures across the plains will be quite mild today
due to the downsloping flow across the region.

The primary weather story of the day is going to be the hazardous
conditions developing in the mountains tonight because of the
heavy snow and winds.

.LONG TERM...(Sunday through Friday)
Issued at 450 AM MST Sat Dec 10 2016

A disturbance will move across nrn CO in wnw flow aloft Sun morning
and then should be east of the area by aftn.  Snow will continue in
the mtns thru the morning hours but will decrease by midday as drier
air begins to spread across.  Although snow will decrease gusty
winds will produce widespread blowing snow abv 10000 ft.  Across the
nern CO a cdfnt will move across early in the morning and may
provide a brief period of upslope flow.  As the disturbance moves
across in the morning there could be a good chc of snow across
portions of nern CO.  Right now it appears best chc would be along
and north of a Denver to Akron line so have raised pops into the chc
category.  By midday day snow threat will end as disturbance moves
east of the area.  As for highs readings will range fm the mid 30s
across the far nern corner with lower 40s around Denver.

For Sun night thru Mon wnw flow aloft will remain across the area
with limited moisture embedded in the flow.  Although orographics
will remain favorable in the mtns moisture depth is rather shallow
so only some light snow is expected.  However winds will remain stg
at times abv 10000 feet so expect quite a bit of blowing snow over
the higher passes.  Across nern CO it will be dry with with aftn
highs in the upper 30s to mid 40s.  Also will see wnw gusty winds in
the foothills and across the the plains nr the WY-NE border by aftn.

By Mon Night into Tue moisture will increase once again in wnw flow
aloft with more orographic snow expected in the mtns. Position of
upper level jet could also enhance snowfall especially along and
north of I-70. Across nern CO another fnt will move across the
plains with shallow upslope flow developing by aftn. There could
be a chc of snow nr the WY border by aftn as this area will be nr
the upper level jet. As for highs temps will drop back into the
upper 20s to mid 30s over nern CO.

For Tue night into Wed orographic snow will continue in the mtns.
Position of upper level jet may still lead to enhancement of
snowfall rates once again along and north of I-70.  Over nern CO
another shot of colder air may affect the plains with some increase
in upslope flow.  Position of upper level jet will determine where
best chc will be with banded areas of heavier snow certainly
possible. Currently best chc looks to be closer to the WY-NE border.
Highs will range fm the upper teens nr the WY-NE border with lower
to mid 20s elsewhere.

By Wed night into Thu the flow aloft will be wly with cross-sections
still showing abundant moisture embedded in the flow. Thus will
continue to see periods of orographic driven snow in the mtns.
Across nern CO there are some differences between the ECMWf and
GFS with regards to sfc ptrns. The ECMWF shows sely low lvl flow
developing as cold sfc high pres is over the cntrl US while at the
same time the GFS has another surge moving into nern CO in the
aftn with the flow more ely. In addition the GFS has an upper
level jet over the area with far more moisture across nern Co vs
the ECMWF. As a result the GFS solution would bring another chc of
snow to portions of nern CO while the ECMWF would have a drier
solution. This far out hard to say which soluton is the best so
will just keep in some low pops over nern Co with highs in the mid
20s to lower 30s.

For Thu night into Fri the flow aloft will become more swly as an
upper level trough dvlps over the wrn US.  Snow would continue in
the mtns however amounts would probably be lighter as swly flow is
not as favored except in zn 31.  Over nern CO there could be a chc
of snow as upper level jet will be over the area with moist sw flow
aloft.  Both the ECMWF and GFS show another possible surge of colder
air at some point either in the aftn or evening as well.

&&

.AVIATION...(For the 12Z TAFS through 12Z Sunday morning)
Issued at 450 AM MST Sat Dec 10 2016

Even though conditions in the mountains will be deteriorating
through the day as the next winter storm moves in, on the plains
the strong westerly flow aloft will produce drying at the mid
levels, and therefore little impact on aviation through the
afternoon and evening. Cloud heights should remain well above 6000
feet AGL, and winds will be 10 knots or less until mid-afternoon.
Later in the afternoon, KBJC may see an increase in westerly
winds. Later this evening, a few showers of rain or snow may move
across the Denver airports. Precipitation amounts should be light
and ceilings are expected to remain above 5000 feet AGL. Overnight
may see some light snow flurries, but no snow accumulations are
expected as ceilings remain in the VFR category.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
Winter Storm Warning from 2 PM this afternoon to 11 AM MST
Sunday for COZ031-033-034.

Winter Weather Advisory from 2 PM this afternoon to 11 AM MST
Sunday for COZ030-032.

&&

SHORT TERM...Dankers
LONG TERM...RPK
AVIATION...Dankers

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1103 AM MST FRI DEC 9 2016

COZ030>051-101815-
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-
1103 AM MST FRI DEC 9 2016

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

.DAY ONE...TODAY AND TONIGHT

LIGHT SNOW WILL CONTINUE OVER THE MOUNTAINS THIS AFTERNOON WITH
ONLY UP TO 3 MORE INCHES OF ACCUMULATION. TRAVEL WILL BE
HAZARDOUS WITH SNOW COVERED ROADS AND POOR VISIBILITY BECAUSE OF
BLOWING AND DRIFTING SNOW. THE AIRMASS OVER THE FORECAST AREA
WILL MODERATE TODAY WITH TEMPERATURES WARMING TO NEAR SEASONAL
NORMALS.

LINGERING SNOW IN THE HIGH COUNTRY WILL CONTINUE TO DECREASE
THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

STRONG GUSTY WINDS AND PERIODS OF ACCUMULATING SNOW WILL CONTINUE
IN THE MOUNTAINS THROUGH THE WEEKEND AND INTO EARLY NEXT WEEK. A
WEATHER DISTURBANCE MOVING OVER THE STATE SATURDAY NIGHT AND
SUNDAY WILL BRING THE HEAVIEST SNOWFALL OF THE WEEKEND TO THE
MOUNTAINS WITH CONSIDERABLE BLOWING SNOW AND HAZARDOUS TRAVEL
CONDITIONS. ON THE PLAINS...TEMPERATURES WILL MODERATE OVER THE
WEEKEND WITH MOSTLY DRY CONDITIONS. THERE WILL BE A CHANCE OF
RAIN AND SNOW SHOWERS LATE SATURDAY AS THE WEATHER DISTURBANCE
MOVES OUT ONTO THE PLAINS.

AN ARCTIC COLD FRONT MOVING INTO THE STATE TUESDAY WILL BRING
COLD TEMPERATURES BACK TO THE REGION FOR THE MIDDLE HALF OF THE
WEEK. THERE WILL ALSO BE A CHANCE OF SNOW ACROSS THE PLAINS ON
LATE TUESDAY AND WEDNESDAY. MOUNTAIN AREAS WILL ANOTHER ROUND OF
ACCUMULATING SNOW.

PERSONS PLANNING TRAVEL INTO THE COLORADO HIGH COUNTRY SHOULD
REMAIN ALERT TO THE LATEST FORECASTS THROUGH THE UPCOMING WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.
HOWEVER...REPORTS OF ACCUMULATING SNOW IN THE MOUNTAINS WILL BE
APPRECIATED.