Wind Chill Watch 1, NWS Cheyenne, WY

796 
WWUS45 KCYS 071308
WSWCYS

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
608 AM MST WED DEC 7 2016

...ACCUMULATING SNOWFALL WITH SLICK ROADS THROUGH MID-MORNING...

...DANGEROUS WIND CHILLS THIS MORNING AND AGAIN TONIGHT THROUGH
THURSDAY MORNING...

WYZ106-116-072115-
/O.EXP.KCYS.WW.Y.0034.000000T0000Z-161207T1300Z/
/O.NEW.KCYS.WW.Y.0035.161207T1308Z-161207T1600Z/
/O.CON.KCYS.WC.A.0001.161208T0100Z-161208T1500Z/
CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY-
SOUTH LARAMIE RANGE-
INCLUDING THE CITIES OF...BORDEAUX...BUFORD...PUMPKIN VINE...
VEDAUWOO
608 AM MST WED DEC 7 2016

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 9 AM MST THIS
MORNING...
...WIND CHILL WATCH REMAINS IN EFFECT FROM 6 PM MST THIS EVENING
THROUGH THURSDAY MORNING...
...WINTER WEATHER ADVISORY HAS EXPIRED...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL 9 AM MST
THIS MORNING.

* TIMING...THROUGH 9 AM WEDNESDAY MORNING.

* TOTAL SNOW ACCUMULATIONS...2 TO 5 INCHES...HIGHEST OVER THE 
  SOUTHERN LARAMIE RANGE. 

* WINDS/VISIBILITY...NORTHEAST 10 TO 20 MPH WITH VISIBILITIES 
  AROUND ONE MILE AT TIMES. 

* WIND CHILL VALUES...WIND CHILLS TONIGHT MAY FALL TO 30 TO 40 
  BELOW ZERO IN THE LARAMIE VALLEY AND SOUTHERN LARAMIE RANGE. 
  ELSEWHERE...VALUES LOOK TO RANGE FROM 25 TO 35 BELOW ZERO. 

* IMPACTS...LIGHT TO MODERATE SNOW WILL CREATE TRAVEL 
  DIFFICULTIES...CREATING PERIODS OF HAZARDOUS TRAVEL CONDITIONS 
  DUE TO LOW VISIBILITIES AND SLICK ROADS. VERY LOW WIND CHILL 
  VALUES WILL BE DANGEROUS TO THOSE CAUGHT OUTDOORS AND 
  UNPREPARED. FROST BITE OR HYPOTHERMIA MAY DEVELOP QUICKLY IF 
  PRECAUTIONS ARE NOT TAKEN. 

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.

A WIND CHILL WATCH MEANS THE THERE IS THE POTENTIAL FOR A
COMBINATION OF VERY COLD AIR AND STRONG WINDS TO CREATE
DANGEROUSLY LOW WIND CHILL VALUES. MONITOR THE LATEST FORECASTS
AND WARNINGS FOR UPDATES ON THIS SITUATION.

&&

$$

WYZ110-114-115-072115-
/O.EXP.KCYS.WW.Y.0034.000000T0000Z-161207T1300Z/
/O.CON.KCYS.WC.A.0001.161208T0100Z-161208T1500Z/
NORTH SNOWY RANGE FOOTHILLS-SNOWY RANGE-LARAMIE VALLEY-
INCLUDING THE CITIES OF...ARLINGTON...ELK MOUNTAIN...CENTENNIAL...
ALBANY...BOSLER...LARAMIE
608 AM MST WED DEC 7 2016

...WIND CHILL WATCH REMAINS IN EFFECT FROM 6 PM MST THIS EVENING
THROUGH THURSDAY MORNING...
...WINTER WEATHER ADVISORY FOR SNOW HAS EXPIRED...

* WIND CHILL VALUES...WIND CHILLS TONIGHT MAY FALL TO 30 TO 40  
  BELOW ZERO IN THE LARAMIE VALLEY AND SOUTHERN LARAMIE RANGE.  
  ELSEWHERE...VALUES LOOK TO RANGE FROM 25 TO 35 BELOW ZERO.

* IMPACTS...LIGHT TO MODERATE SNOW WILL CREATE TRAVEL 
  DIFFICULTIES...CREATING PERIODS OF HAZARDOUS TRAVEL CONDITIONS 
  DUE TO LOW VISIBILITIES AND SLICK ROADS. VERY LOW WIND CHILL 
  VALUES WILL BE DANGEROUS TO THOSE CAUGHT OUTDOORS AND 
  UNPREPARED. FROST BITE OR HYPOTHERMIA MAY DEVELOP QUICKLY IF 
  PRECAUTIONS ARE NOT TAKEN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL WATCH MEANS THE THERE IS THE POTENTIAL FOR A
COMBINATION OF VERY COLD AIR AND STRONG WINDS TO CREATE
DANGEROUSLY LOW WIND CHILL VALUES. MONITOR THE LATEST FORECASTS
AND WARNINGS FOR UPDATES ON THIS SITUATION.

&&

$$

WYZ104-105-109-113-072115-
/O.CON.KCYS.WC.Y.0001.000000T0000Z-161207T1800Z/
/O.CON.KCYS.WC.A.0001.161208T0100Z-161208T1500Z/
FERRIS/SEMINOE/SHIRLEY MOUNTAINS-SHIRLEY BASIN-
CENTRAL CARBON COUNTY-UPPER NORTH PLATTE RIVER BASIN-
INCLUDING THE CITIES OF...SEMINOE DAM...MEDICINE BOW...
SHIRLEY BASIN...RAWLINS...SARATOGA...ENCAMPMENT
608 AM MST WED DEC 7 2016

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL WATCH REMAINS IN EFFECT FROM 6 PM MST THIS EVENING
THROUGH THURSDAY MORNING...

* WIND CHILL VALUES...20 TO 30 DEGREES BELOW ZERO THIS MORNING. 
  WIND CHILLS COULD FALL TO VALUES OF MINUS 30 OR BELOW TONIGHT 
  THROUGH THURSDAY MORNING. 

* IMPACTS...VERY LOW WIND CHILL VALUES WILL BE DANGEROUS TO 
  THOSE CAUGHT OUTDOORS AND UNPREPARED. FROST BITE OR 
  HYPOTHERMIA MAY DEVELOP QUICKLY IF PRECAUTIONS ARE NOT TAKEN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE WIND CHILL IS THE TEMPERATURE YOUR BODY FEELS WHEN THE AIR
TEMPERATURE IS COMBINED WITH THE WIND SPEED. WIND CHILLS IN THE
MINUS 20 TO 29 DEGREE RANGE CAN CAUSE FROST BITE IN 30 MINUTES OR
LESS. THE MOST SUSCEPTIBLE PARTS OF THE BODY ARE THE EXTREMITIES
SUCH AS FINGERS...TOES...EAR LOBES OR THE TIP OF THE NOSE.

&&

$$

NEZ054-055-WYZ117>119-071600-
/O.CON.KCYS.WW.Y.0034.000000T0000Z-161207T1600Z/
KIMBALL-CHEYENNE-SOUTH LARAMIE RANGE FOOTHILLS-
CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY-
INCLUDING THE CITIES OF...KIMBALL...BROWNSON...SIDNEY...
WHITAKER...FEDERAL...HORSE CREEK...CHEYENNE...PINE BLUFFS
608 AM MST WED DEC 7 2016

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MST THIS
MORNING...

* TIMING...THROUGH 9 AM THIS MORNING.

* TOTAL SNOW ACCUMULATIONS...2 TO 4 INCHES. HIGHEST AMOUNTS NEAR 
  THE LARAMIE RANGE. 

* WINDS/VISIBILITY...NORTH TO NORTHEAST 10 TO 20 MPH WITH 
  OCCASIONAL GUSTS AROUND 25 MPH. VISIBILITIES AROUND ONE MILE 
  AT TIMES DUE TO FALLING SNOW. 

* IMPACTS...MAINLY TRAVEL DIFFICULTIES. LIGHT TO MODERATE SNOW 
  WILL CREATE PERIODS OF HAZARDOUS TRAVEL CONDITIONS DUE TO LOW 
  VISIBILITIES AND SLICK ROADS. 

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.

&&

$$

NEZ002-095-096-WYZ101-102-107-108-111-071800-
/O.CON.KCYS.WC.Y.0001.000000T0000Z-161207T1800Z/
DAWES-NORTH SIOUX-SOUTH SIOUX-CONVERSE COUNTY LOWER ELEVATIONS-
NIOBRARA COUNTY-EAST PLATTE COUNTY-GOSHEN COUNTY-
SOUTHWEST CARBON COUNTY-
INCLUDING THE CITIES OF...CHADRON...CHADRON ST PARK...HARRISON...
AGATE...BILL...DOUGLAS...DEER CREEK...GLENROCK...LUSK...REDBIRD...
WHEATLAND...GUERNSEY...TORRINGTON...BAGGS
608 AM MST WED DEC 7 2016

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WIND CHILL VALUES...20 TO 30 DEGREES BELOW ZERO.

* IMPACTS...VERY LOW WIND CHILL VALUES WILL BE DANGEROUS TO 
  THOSE CAUGHT OUTDOORS AND UNPREPARED. FROST BITE OR 
  HYPOTHERMIA MAY DEVELOP QUICKLY IF PRECAUTIONS ARE NOT TAKEN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE WIND CHILL IS THE TEMPERATURE YOUR BODY FEELS WHEN THE AIR
TEMPERATURE IS COMBINED WITH THE WIND SPEED. WIND CHILLS IN THE
MINUS 20 TO 29 DEGREE RANGE CAN CAUSE FROST BITE IN 30 MINUTES OR
LESS. THE MOST SUSCEPTIBLE PARTS OF THE BODY ARE THE EXTREMITIES
SUCH AS FINGERS...TOES...EAR LOBES OR THE TIP OF THE NOSE.

&&

$$

WYZ103-072115-
/O.CON.KCYS.WC.A.0001.161208T0100Z-161208T1500Z/
NORTH LARAMIE RANGE-
INCLUDING THE CITY OF...GARRETT
608 AM MST WED DEC 7 2016

...WIND CHILL WATCH REMAINS IN EFFECT FROM 6 PM MST THIS EVENING
THROUGH THURSDAY MORNING...

* WIND CHILL VALUES...VALUES OF 30 TO 40 BELOW ZERO ARE POSSIBLE.

* IMPACTS...VERY LOW WIND CHILL VALUES WILL BE DANGEROUS TO 
  THOSE CAUGHT OUTDOORS AND UNPREPARED. FROST BITE OR 
  HYPOTHERMIA MAY DEVELOP QUICKLY IF PRECAUTIONS ARE NOT TAKEN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL WATCH MEANS THE THERE IS THE POTENTIAL FOR A
COMBINATION OF VERY COLD AIR AND STRONG WINDS TO CREATE
DANGEROUSLY LOW WIND CHILL VALUES. MONITOR THE LATEST FORECASTS
AND WARNINGS FOR UPDATES ON THIS SITUATION.

&&

$$

419 
WWUS45 KCYS 071550
WSWCYS

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
850 AM MST WED DEC 7 2016

WYZ106-116-080000-
/O.CAN.KCYS.WW.Y.0035.000000T0000Z-161207T1600Z/
/O.CON.KCYS.WC.A.0001.161208T0100Z-161208T1500Z/
CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY-
SOUTH LARAMIE RANGE-
INCLUDING THE CITIES OF...BORDEAUX...BUFORD...PUMPKIN VINE...
VEDAUWOO
850 AM MST WED DEC 7 2016

...WIND CHILL WATCH REMAINS IN EFFECT FROM 6 PM MST THIS EVENING
THROUGH THURSDAY MORNING...

...WINTER WEATHER ADVISORY IS CANCELLED...

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

SOME LINGERING FLURRIES ARE POSSIBLE THIS MORNING BUT LITTLE IF
ANY ADDITIONAL SNOW ACCUMULATION IS EXPECTED.

DANGEROUS WIND CHILLS ARE POSSIBLE TONIGHT HOWEVER.

* WIND CHILL VALUES...WIND CHILLS TONIGHT MAY FALL TO 30 TO 40  
BELOW ZERO IN THE LARAMIE VALLEY AND SOUTHERN LARAMIE RANGE.  
ELSEWHERE...VALUES LOOK TO RANGE FROM 25 TO 35 BELOW ZERO.

* IMPACTS...VERY LOW WIND CHILL VALUES WILL BE DANGEROUS TO THOSE
  CAUGHT OUTDOORS AND UNPREPARED. FROST BITE OR HYPOTHERMIA MAY
  DEVELOP QUICKLY IF PRECAUTIONS ARE NOT TAKEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL WATCH MEANS THE THERE IS THE POTENTIAL FOR A
COMBINATION OF VERY COLD AIR AND WINDS TO CREATE DANGEROUSLY LOW
WIND CHILL VALUES. MONITOR THE LATEST FORECASTS AND WARNINGS FOR
UPDATES ON THIS SITUATION.

&&

$$

WYZ104-105-109-113-080000-
/O.CAN.KCYS.WC.Y.0001.000000T0000Z-161207T1800Z/
/O.CON.KCYS.WC.A.0001.161208T0100Z-161208T1500Z/
FERRIS/SEMINOE/SHIRLEY MOUNTAINS-SHIRLEY BASIN-
CENTRAL CARBON COUNTY-UPPER NORTH PLATTE RIVER BASIN-
INCLUDING THE CITIES OF...SEMINOE DAM...MEDICINE BOW...
SHIRLEY BASIN...RAWLINS...SARATOGA...ENCAMPMENT
850 AM MST WED DEC 7 2016

...WIND CHILL WATCH REMAINS IN EFFECT FROM 6 PM MST THIS EVENING
THROUGH THURSDAY MORNING...
...WIND CHILL ADVISORY FOR THIS MORNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS CANCELLED THE WIND
CHILL ADVISORY FOR THIS MORNING. DANGEROUS WIND CHILLS MAY OCCUR
TONIGHT. 

* WIND CHILL VALUES...MINUS 30 OR BELOW TONIGHT THROUGH THURSDAY
  MORNING.

* IMPACTS...VERY LOW WIND CHILL VALUES WILL BE DANGEROUS TO 
  THOSE CAUGHT OUTDOORS AND UNPREPARED. FROST BITE OR 
  HYPOTHERMIA MAY DEVELOP QUICKLY IF PRECAUTIONS ARE NOT TAKEN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE WIND CHILL IS THE TEMPERATURE YOUR BODY FEELS WHEN THE AIR
TEMPERATURE IS COMBINED WITH THE WIND SPEED. WIND CHILLS IN THE
MINUS 20 TO 29 DEGREE RANGE CAN CAUSE FROST BITE IN 30 MINUTES OR
LESS. THE MOST SUSCEPTIBLE PARTS OF THE BODY ARE THE EXTREMITIES
SUCH AS FINGERS...TOES...EAR LOBES OR THE TIP OF THE NOSE.

A WIND CHILL WATCH MEANS THE THERE IS THE POTENTIAL FOR A
COMBINATION OF VERY COLD AIR AND WINDS TO CREATE DANGEROUSLY LOW
WIND CHILL VALUES. MONITOR THE LATEST FORECASTS AND WARNINGS FOR
UPDATES ON THIS SITUATION.

&&

$$

NEZ054-055-WYZ117>119-071700-
/O.CAN.KCYS.WW.Y.0034.000000T0000Z-161207T1600Z/
KIMBALL-CHEYENNE-SOUTH LARAMIE RANGE FOOTHILLS-
CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY-
INCLUDING THE CITIES OF...KIMBALL...BROWNSON...SIDNEY...
WHITAKER...FEDERAL...HORSE CREEK...CHEYENNE...PINE BLUFFS
850 AM MST WED DEC 7 2016

...WINTER WEATHER ADVISORY IS CANCELLED...

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

SOME LINGERING FLURRIES ARE POSSIBLE THIS MORNING BUT LITTLE IF
ANY ADDITIONAL ACCUMULATION IS EXPECTED.

$$

NEZ002-095-096-WYZ101-102-107-108-111-071700-
/O.CAN.KCYS.WC.Y.0001.000000T0000Z-161207T1800Z/
DAWES-NORTH SIOUX-SOUTH SIOUX-CONVERSE COUNTY LOWER ELEVATIONS-
NIOBRARA COUNTY-EAST PLATTE COUNTY-GOSHEN COUNTY-
SOUTHWEST CARBON COUNTY-
INCLUDING THE CITIES OF...CHADRON...CHADRON ST PARK...HARRISON...
AGATE...BILL...DOUGLAS...DEER CREEK...GLENROCK...LUSK...REDBIRD...
WHEATLAND...GUERNSEY...TORRINGTON...BAGGS
850 AM MST WED DEC 7 2016

...WIND CHILL ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS CANCELLED THE WIND
CHILL ADVISORY. 

WIND CHILLS ARE HIGH ENOUGH NOW THIS MORNING TO ALLOW THE
ADVISORY TO BE CANCELLED.

$$

WYZ103-110-114-115-080000-
/O.CON.KCYS.WC.A.0001.161208T0100Z-161208T1500Z/
NORTH LARAMIE RANGE-NORTH SNOWY RANGE FOOTHILLS-SNOWY RANGE-
LARAMIE VALLEY-
INCLUDING THE CITIES OF...GARRETT...ARLINGTON...ELK MOUNTAIN...
CENTENNIAL...ALBANY...BOSLER...LARAMIE
850 AM MST WED DEC 7 2016

...WIND CHILL WATCH REMAINS IN EFFECT FROM 6 PM MST THIS EVENING
THROUGH THURSDAY MORNING...

* WIND CHILL VALUES...VALUES OF 30 TO 40 BELOW ZERO ARE POSSIBLE.

* IMPACTS...VERY LOW WIND CHILL VALUES WILL BE DANGEROUS TO 
  THOSE CAUGHT OUTDOORS AND UNPREPARED. FROST BITE OR 
  HYPOTHERMIA MAY DEVELOP QUICKLY IF PRECAUTIONS ARE NOT TAKEN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL WATCH MEANS THE THERE IS THE POTENTIAL FOR A
COMBINATION OF VERY COLD AIR AND STRONG WINDS TO CREATE
DANGEROUSLY LOW WIND CHILL VALUES. MONITOR THE LATEST FORECASTS
AND WARNINGS FOR UPDATES ON THIS SITUATION.

&&

$$

851 
WWUS45 KCYS 072121
WSWCYS

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
221 PM MST WED DEC 7 2016

...VERY LOW TO DANGEROUSLY COLD WIND CHILLS EXPECTED TONIGHT...

.CLEARING SKIES WEDNESDAY EVENING WILL ALLOW TEMPERATURES TO FALL
BELOW ZERO ACROSS THE AREA THIS EVENING. THESE VERY LOW
TEMPERATURES ALONG WITH EVEN LIGHT BREEZES WILL RESULT IN VERY
COLD WIND CHILL VALUES OVERNIGHT INTO THURSDAY MORNING...LOWEST
OVER THE LARAMIE VALLEY AND SURROUNDING AREAS.

WYZ116-072230-
/O.CAN.KCYS.WC.A.0001.161208T0100Z-161208T1500Z/
SOUTH LARAMIE RANGE-
INCLUDING THE CITIES OF...BUFORD...PUMPKIN VINE...VEDAUWOO
221 PM MST WED DEC 7 2016

...WIND CHILL WATCH IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS CANCELLED THE WIND
CHILL WATCH. 

IT APPEARS WIND CHILLS WILL REMAIN ABOVE CRITICAL THRESHOLDS
OVERNIGHT BUT STILL SHOULD FALL TO 15 BELOW TO 25 BELOW ZERO.

$$

WYZ103-105-110-113>115-081100-
/O.UPG.KCYS.WC.A.0001.161208T0100Z-161208T1500Z/
/O.NEW.KCYS.WC.W.0001.161208T0400Z-161208T1600Z/
NORTH LARAMIE RANGE-SHIRLEY BASIN-NORTH SNOWY RANGE FOOTHILLS-
UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE-LARAMIE VALLEY-
INCLUDING THE CITIES OF...GARRETT...MEDICINE BOW...
SHIRLEY BASIN...ARLINGTON...ELK MOUNTAIN...SARATOGA...
ENCAMPMENT...CENTENNIAL...ALBANY...BOSLER...LARAMIE
221 PM MST WED DEC 7 2016

...WIND CHILL WARNING IN EFFECT FROM 9 PM THIS EVENING TO 9 AM
MST THURSDAY...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A WIND CHILL
WARNING...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO 9 AM MST
THURSDAY. THE WIND CHILL WATCH IS NO LONGER IN EFFECT. 

* WIND CHILL VALUES...MINUS 30 OR BELOW BY LATE WEDNESDAY EVENING
  THROUGH THURSDAY MORNING.

* IMPACTS...VERY LOW WIND CHILL VALUES WILL BE DANGEROUS TO 
  THOSE CAUGHT OUTDOORS AND UNPREPARED. FROST BITE OR 
  HYPOTHERMIA MAY DEVELOP QUICKLY IF PRECAUTIONS ARE NOT TAKEN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE WIND CHILL IS THE TEMPERATURE YOUR BODY FEELS WHEN THE AIR
TEMPERATURE IS COMBINED WITH THE WIND SPEED. WIND CHILLS IN THE
MINUS 20 TO 29 DEGREE RANGE CAN CAUSE FROST BITE IN 30 MINUTES OR
LESS. THE MOST SUSCEPTIBLE PARTS OF THE BODY ARE THE EXTREMITIES
SUCH AS FINGERS...TOES...EAR LOBES OR THE TIP OF THE NOSE.

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

&&

$$

WYZ104-106-109-081100-
/O.UPG.KCYS.WC.A.0001.161208T0100Z-161208T1500Z/
/O.NEW.KCYS.WC.Y.0002.161208T0400Z-161208T1600Z/
FERRIS/SEMINOE/SHIRLEY MOUNTAINS-
CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY-
CENTRAL CARBON COUNTY-
INCLUDING THE CITIES OF...SEMINOE DAM...BORDEAUX...RAWLINS
221 PM MST WED DEC 7 2016

...WIND CHILL ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 9 AM
MST THURSDAY...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A WIND CHILL
ADVISORY...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO 9 AM MST
THURSDAY. THE WIND CHILL WATCH IS NO LONGER IN EFFECT. 

* WIND CHILL VALUES...MINUS 20 TO MINUS 30 BY LATE WEDNESDAY
  EVENING TONIGHT THROUGH THURSDAY MORNING.

* IMPACTS...VERY LOW WIND CHILL VALUES WILL BE DANGEROUS TO 
  THOSE CAUGHT OUTDOORS AND UNPREPARED. FROST BITE OR 
  HYPOTHERMIA MAY DEVELOP QUICKLY IF PRECAUTIONS ARE NOT TAKEN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE WIND CHILL IS THE TEMPERATURE YOUR BODY FEELS WHEN THE AIR
TEMPERATURE IS COMBINED WITH THE WIND SPEED. WIND CHILLS IN THE
MINUS 20 TO 29 DEGREE RANGE CAN CAUSE FROST BITE IN 30 MINUTES OR
LESS. THE MOST SUSCEPTIBLE PARTS OF THE BODY ARE THE EXTREMITIES
SUCH AS FINGERS...TOES...EAR LOBES OR THE TIP OF THE NOSE.

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.

&&

$$

NEZ002-003-019>021-055-095-096-WYZ101-102-107-108-081100-
/O.NEW.KCYS.WC.Y.0002.161208T0400Z-161208T1600Z/
DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-CHEYENNE-NORTH SIOUX-
SOUTH SIOUX-CONVERSE COUNTY LOWER ELEVATIONS-NIOBRARA COUNTY-
EAST PLATTE COUNTY-GOSHEN COUNTY-
INCLUDING THE CITIES OF...CHADRON...CHADRON ST PARK...ALLIANCE...
SCOTTSBLUFF...GERING...HARRISBURG...ANGORA...BRIDGEPORT...
BAYARD...REDINGTON...BROWNSON...SIDNEY...HARRISON...AGATE...
BILL...DOUGLAS...DEER CREEK...GLENROCK...LUSK...REDBIRD...
WHEATLAND...GUERNSEY...TORRINGTON
221 PM MST WED DEC 7 2016

...WIND CHILL ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 9 AM
MST THURSDAY...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A WIND CHILL
ADVISORY...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO 9 AM MST
THURSDAY. 

* WIND CHILL VALUES...MINUS 20 TO MINUS 30 BY LATE WEDNESDAY
  EVENING TONIGHT THROUGH THURSDAY MORNING.

* IMPACTS...VERY LOW WIND CHILL VALUES WILL BE DANGEROUS TO 
  THOSE CAUGHT OUTDOORS AND UNPREPARED. FROST BITE OR 
  HYPOTHERMIA MAY DEVELOP QUICKLY IF PRECAUTIONS ARE NOT TAKEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE WIND CHILL IS THE TEMPERATURE YOUR BODY FEELS WHEN THE AIR
TEMPERATURE IS COMBINED WITH THE WIND SPEED. WIND CHILLS IN THE
MINUS 20 TO 29 DEGREE RANGE CAN CAUSE FROST BITE IN 30 MINUTES OR
LESS. THE MOST SUSCEPTIBLE PARTS OF THE BODY ARE THE EXTREMITIES
SUCH AS FINGERS...TOES...EAR LOBES OR THE TIP OF THE NOSE.

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND WIND 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.

&&

$$

Area Forecast Discussion
National Weather Service Cheyenne WY
1043 PM MST Tue Dec 6 2016

.UPDATE...
Issued at 843 PM MST Tue Dec 6 2016

Dangerous wind chills are looking more likely tonight for portions
of southeast Wyoming and the northern Nebraska Panhandle. Numerous
sites are already experiencing wind chill values in the 0F to -10F
range, so expect a widespread area to easily achieve adzy criteria
by sunrise as the arctic front blasts south and sfc winds increase
again by 12z or so. Thus, the main change tonight was to introduce
a Wind Chill Advisory for several areas which are not currently in
a winter highlight.

The Winter Weather Advisory is in good shape as snow has developed
along the I-80 corridor. Roads are becoming slick and snow covered
and visibilities are poor per WYDOT webcams. Radar trends indicate
snow could begin any time over the southern NE Panhandle. The most
recent IR satellite loop shows very cold cloud tops, so should see
some precipitation enhancement. However, the snow type will change
quickly in the next few hours as colder air filters in. This could
significantly impact total snow, but will leave the forecast as-is
for now.

&&

.SHORT TERM...(This evening through Thursday night)
Issued at 149 PM MST Tue Dec 6 2016

Very cold airmass has settled over the area today with afternoon
temperatures struggling to reach the mid to upper teens across
most of southeast Wyoming. Current water vapor loop shows the next
disturbance aloft moving over the Great Basin region this
afternoon. This feature will be our next snow producer across the
area...mainly along the I80 corridor. Winds have begun to switch
into the east and northeast over southeast Wyoming as a surface
low develops west of the Rocky Mountains...and an arctic high at
the surface drifts southward into Montana. Current Radar loop
shows some echoes aloft begin to form across the mountains of
Colorado. Based on short range models and ensembles...believe this
trend will continue through this afternoon. Upslope winds will
provide some moisture...but it is awfully dry in the boundary
layer with relatively humidities at the surface currently between
20 to 40 percent. Believe it will take some time for the air to
saturate...but snow is still expected to develop around
Laramie...Cheyenne...and the I-80 summit between 4 PM and 7 PM.
This snow will spread north and eastward through the night. Areas
of snow will likely not extend too far north of the Platte River
valley as the arctic airmass begins to move into the region...so
locations north of a line from Rawlins to Alliance Nebraska may
not see much snow accumulation at all. Current forecast looks
good...but added the Snowy Range...Snowy Range foothills...and SW
Platte county including Wheatland and Chugwater to the Winter
Weather Advisory for 2 to 4 inches of snow with travel impacts and
4 to 8 inches in the mountains. Thought about upgrading the
advisory to a Winter Storm Warning for the I-80 summit...but
maximum dendritic growth will be difficult due to the very cold
temperatures so decided against it. Travel conditions will still
be hazardous through Wednesday morning. In addition...winds appear
to be a little higher than previously expected so can not rule out
north to northeast gusts around 25 to 30 mph across the area.
Blowing snow threat still appears minima...but drifting snow may
be a concern well into Wednesday.

The arctic front will arrive late tonight and early Wednesday
morning. Temperatures tonight may remain in the teens for a while
before the bitter cold air enters the region after midnight. Would
not be surprised to see readings below zero around dawn across
most of southeast Wyoming and northern Nebraska. Wind chill
temperatures for the morning commute will likely range between -15
to -25 across the forecast area in light snow.

For Wednesday...snowfall will rapidly end from northwest to
southeast in the morning leaving flurries across the area in the
afternoon. High temperatures will be in the single digits...with
maybe low teens across western Nebraska. Will have to monitor
model trends with low temperatures Wednesday night/early Thursday
due to clearing skies and a snowpack in some areas. Can not rule
out lows near -25 to -35 in the more sheltered valleys due to
light winds. Believe most locations will range between -15 to -5
by early Thursday with extremely cold wind chill readings. Will
likely need Wind Chill headlines early Thursday morning for feel-
like temperatures between -25 to -40 across the area. Temperatures
will be 5 to 10 degrees higher on Thursday...but still in the
teens for highs. With a south wind...may need fog and/or low
stratus over the Cheyenne and Pine ridges into Thursday night.

.LONG TERM...(Friday through Tuesday)
Issued at 230 PM MST Tue Dec 6 2016

A generally west to west-northwest flow aloft will hold over
the region through the period. After a chilly morning Friday
the cold surface airmass retreats east and allows warmer air
to spread back over the CWA Friday. Temperatures will remain
on the mild side Saturday. This flow pattern will also bring
periodic snow showers to the mountains as moisture rides up
the facing slopes. Scattered snow showers should spread into
the plains late Sat as an upper shortwave scoots east across
the region with a push of colder Canadian air accompanying it.
Cool and mainly dry Sunday and Monday with a few snow showers
still possible over the higher mtns.  The next push of colder
air may arrive by Tuesday.

&&

.AVIATION...(For the 06Z TAFS through 06Z Wednesday night)
Issued at 1037 PM MST Tue Dec 6 2016

Periods of snow will continue along the I80 corridor through 12 to
15z Wed before tapering off. Conditions will fluctuate between IFR
and MVFR at KCYS/KLAR/KSNY and possibly KBFF as well. We expect to
see some improvement for all terminals after 18z.

&&

.FIRE WEATHER...
Issued at 149 PM MST Tue Dec 6 2016

No Fire Weather concerns this week as accumulating snow and
bitter cold temperatures are expected. Relative humidity will
remain high with excellent overnight recoveries. Slightly warmer
temperatures are expected by the end of the week before the next
cold front pushes through the region this weekend.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...Wind Chill Advisory until 11 AM MST Wednesday for WYZ101-102-104-
     105-107>109-111-113.

     Winter Weather Advisory until 9 AM MST Wednesday for WYZ117>119.

     Winter Weather Advisory until 6 AM MST Wednesday for WYZ106-110-
     114>116.

NE...Wind Chill Advisory until 11 AM MST Wednesday for NEZ002-095-096.

     Winter Weather Advisory until 9 AM MST Wednesday for NEZ054-055.

&&

UPDATE...CLH
SHORT TERM...TJT
LONG TERM...RE
AVIATION...CLH
FIRE WEATHER...TJT

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHEYENNE WY
245 PM MST TUE DEC 6 2016

WYZ101>119-071230-
CONVERSE COUNTY LOWER ELEVATIONS-NIOBRARA COUNTY-
NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS-
SHIRLEY BASIN-CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY-
EAST PLATTE COUNTY-GOSHEN COUNTY-CENTRAL CARBON COUNTY-
NORTH SNOWY RANGE FOOTHILLS-SOUTHWEST CARBON COUNTY-
SIERRA MADRE RANGE-UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE-
LARAMIE VALLEY-SOUTH LARAMIE RANGE-SOUTH LARAMIE RANGE FOOTHILLS-
CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY-
245 PM MST TUE DEC 6 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL
WYOMING...SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING.

.DAY ONE...TODAY AND TONIGHT

SNOW IS EXPECTED TO DEVELOP IN THE MOUNTAINS AND THEN SPREAD ONTO
THE INTERSTATE 80 CORRIDOR BETWEEN LARAMIE AND THE NEBRASKA STATE
LINE THIS EVENING. SNOW WILL CONTINUE THROUGH TONIGHT. ACCUMULATIONS
WILL GENERALLY BE 2 TO 5 INCHES...WITH SLIGHTLY HIGHER AMOUNTS IN
THE MOUNTAINS. HAZARDOUS TRAVEL DUE TO SLICK AND SNOW COVERED ROADS
WILL LIKELY DEVELOP.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

FRIGID TEMPERATURES AND WIND CHILLS WILL CONTINUE THROUGH THURSDAY
AS AN ARCTIC AIRMASS SETTLES OVER THE AREA. MORNING WIND CHILL
READINGS FOR WEDNESDAY MORNING MAY BE AS LOW AS 25 BELOW TO 40 BELOW
ZERO IN AREAS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED...ALTHOUGH SNOWFALL REPORTS
WOULD BE APPRECIATED.

NEZ002-003-019>021-054-055-095-096-071230-
DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE-
NORTH SIOUX-SOUTH SIOUX-
245 PM MST TUE DEC 6 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN
NEBRASKA.

.DAY ONE...TODAY AND TONIGHT

SNOW IS EXPECTED TO DEVELOP OVER THE SOUTHERN NEBRASKA PANHANDLE
THIS EVENING AND CONTINUE INTO WEDNESDAY. SNOWFALL ACCUMULATIONS
SHOULD RANGE FROM 1 TO 3 INCHES WITH THE HIGHEST AMOUNTS NEAR THE
COLORADO BORDER. HAZARDOUS TRAVEL CONDITIONS ARE LIKELY DUE TO SLICK
AND SNOW COVERED ROADS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

FRIGID TEMPERATURES AND WIND CHILLS ARE EXPECTED THROUGH THURSDAY
AS AN ARCTIC AIRMASS SETTLES OVER THE AREA. MORNING WIND CHILL
READINGS FOR WEDNESDAY MORNING MAY BE AS LOW AS 20 TO 30 BELOW ZERO
IN AREAS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED...ALTHOUGH SNOWFALL REPORTS
WOULD BE APPRECIATED.