Winter Storm Warning 11, NWS Cheyenne, WY

083 
WWUS45 KCYS 181017
WSWCYS

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHEYENNE WY
317 AM MST TUE DEC 18 2012

...A QUICK MOVING STORM SYSTEM WILL BRING SNOW TO SOUTHEAST 
WYOMING AND THE NEBRASKA PANHANDLE TONIGHT INTO WEDNESDAY...

.SNOW WHICH HAS BEEN PERSISTENT OVER THE SNOWY AND SIERRA MADRE
RANGES THE LAST SEVERAL DAYS WILL SHIFT INTO THE PLAINS TONIGHT AS
AN UPPER LEVEL DISTURBANCE MOVES ACROSS THE SOUTHERN ROCKIES. THE
SNOWY AND SIERRA RANGES WHICH HAVE SEEN 2 TO 3 FEET OF SNOW OVER
THE LAST SEVERAL DAYS WILL PICK UP ANOTHER 12 TO 18 INCHES BEFORE
SNOW TAPERS OF WEDNESDAY AFTERNOON. 5 TO 10 INCHES OF SNOW IS
EXPECTED OVER THE SOUTHERN LARAMIE RANGE WHILE 3 TO 6 INCH AMOUNTS
AREA LIKELY INTO THE PLAINS. THE HIGHEST ACCUMULATIONS IN THE
PLAINS ARE EXPECTED ALONG INTERSTATE 80. LITTLE IF ANY SNOW
ACCUMULATION WILL OCCUR OVER FAR NORTHERN PORTIONS OF THE NEBRASKA
PANHANDLE AND EAST-CENTRAL WYOMING. SNOW WILL TAPER OFF ACROSS THE
AREA WEDNESDAY AFTERNOON.


WYZ111-113-181130-
/O.CAN.KCYS.WS.W.0011.121218T1900Z-121219T1300Z/
SOUTHWEST CARBON COUNTY-UPPER NORTH PLATTE RIVER BASIN-
INCLUDING THE CITIES OF...BAGGS...DIXON...SARATOGA...ENCAMPMENT...
RIVERSIDE
317 AM MST TUE DEC 18 2012

...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS CANCELLED THE WINTER
STORM WARNING. 

LIGHT SNOW WILL DEVELOP TODAY AND CONTINUE ON AND OFF INTO
WEDNESDAY MORNING. SNOW AMOUNTS WILL GENERALLY BE BETWEEN 2 TO 4
INCHES AND WINDS WILL REMAIN LIGHT.

$$

WYZ112-114-182230-
/O.CON.KCYS.WS.W.0010.000000T0000Z-121220T0100Z/
SIERRA MADRE RANGE-SNOWY RANGE-
INCLUDING THE CITIES OF...CENTENNIAL...ALBANY...WOODS LANDING
317 AM MST TUE DEC 18 2012

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MST
WEDNESDAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MST
WEDNESDAY. 

* TIMING...THROUGH WEDNESDAY AFTERNOON.

* TOTAL SNOW ACCUMULATIONS...ADDITIONAL SNOW AMOUNTS OF 12 TO 18
  INCHES THROUGH WEDNESDAY AFTERNOON. TOTAL SNOW AMOUNTS OF 3 TO
  4 FEET WITH HIGHEST AMOUNTS ALONG WEST FACING SLOPES.

* WINDS/VISIBILITIES...WINDS WILL CONTINUE TO THROUGH THIS
  AFTERNOON WITH LIGHT WINDS TONIGHT INTO WEDNESDAY. SNOWFALL
  RATES ARE EXPECTED TO INCREASE LATE TODAY...WITH PERIODS OF
  HEAVY SNOW AND REDUCED VISIBILITIES TONIGHT.

* IMPACTS...MANY OUTDOOR ACTIVITIES WILL BE DIFFICULT IN THE
  SNOWY AND SIERRA MADRE RANGES THROUGH WEDNESDAY. OUTDOOR
  ENTHUSIASTS MAY WANT TO RECONSIDER RECREATIONAL ACTIVITIES IN
  THE MOUNTAINS DUE TO THE DANGEROUS WINTER CONDITIONS.

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.

&&

$$

WYZ110-115-117>119-182230-
/O.NEW.KCYS.WW.Y.0019.121219T0100Z-121219T1900Z/
NORTH SNOWY RANGE FOOTHILLS-LARAMIE VALLEY-
SOUTH LARAMIE RANGE FOOTHILLS-CENTRAL LARAMIE COUNTY-
EAST LARAMIE COUNTY-
INCLUDING THE CITIES OF...ARLINGTON...ELK MOUNTAIN...LARAMIE...
HORSE CREEK...HARRIMAN...WHITAKER...CHEYENNE...BURNS...
CARPENTER...ALBIN...PINE BLUFFS
317 AM MST TUE DEC 18 2012

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
NOON MST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 6 PM THIS
EVENING TO NOON MST WEDNESDAY.


* TIMING...SNOW WILL DEVELOP LATE THIS AFTERNOON AND CONTINUE
  THROUGH WEDNESDAY MORNING. 

* TOTAL SNOW ACCUMULATIONS...SNOW AMOUNTS IN THE ADVISED AREA WILL
  RANGE FROM 3 TO 6 INCHES. 

* WINDS/VISIBILITIES...WINDS WILL BE LIGHT THROUGH TONIGHT...BUT
  NORTHERLY WINDS WILL GUSTS AS HIGH AS 25 MPH WEDNESDAY
  AFTERNOON. VISIBILITIES COULD BE REDUCED TO 1/2 MILE DURING
  PERIODS OF HEAVIER SNOW.

* IMPACTS...ROADS WILL BECOME SNOW COVERED AND SLIPPERY MAKING
  TRAVEL DIFFICULT. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

$$

WYZ116-182230-
/O.NEW.KCYS.WW.Y.0019.121219T0100Z-121219T1900Z/
SOUTH LARAMIE RANGE-
INCLUDING THE CITIES OF...VEDAUWOO...BUFORD...PUMPKIN VINE
317 AM MST TUE DEC 18 2012

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
NOON MST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 6 PM THIS 
EVENING TO NOON MST WEDNESDAY.


* TIMING...SNOW WILL DEVELOP LATE THIS AFTERNOON AND CONTINUE
  THROUGH WEDNESDAY MORNING.

* TOTAL SNOW ACCUMULATIONS...5 TO 10 INCHES OF SNOW WILL
  ACCUMULATE OVER THE SOUTHERN LARAMIE RANGE.

* WINDS/VISIBILITIES...WINDS WILL BE LIGHT TONIGHT...BUT NORTHERLY
  WINDS MAY GUSTS AS HIGH AS 25 MPH WEDNESDAY AFTERNOON.
  VISIBILITIES COULD BE REDUCED TO 1/2 MILE OR LESS DURING
  PERIODS OF HEAVIER SNOW.

* IMPACTS...ROADS WILL BECOME SNOW COVERED AND SLIPPERY MAKING
  TRAVEL DIFFICULT.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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



$$

NEZ020-021-054-055-182230-
/O.NEW.KCYS.WW.Y.0019.121219T0700Z-121220T0100Z/
BANNER-MORRILL-KIMBALL-CHEYENNE-
INCLUDING THE CITIES OF...HARRISBURG...BRIDGEPORT...BAYARD...
KIMBALL...SIDNEY
317 AM MST TUE DEC 18 2012

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
6 PM MST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT
FROM MIDNIGHT TONIGHT TO 6 PM MST WEDNESDAY.

* TIMING...SNOW WILL DEVELOP LATE THIS EVENING AND CONTINUE INTO
  WEDNESDAY AFTERNOON BEFORE TAPERING OFF.

* TOTAL SNOW ACCUMULATIONS...SNOW AMOUNTS IN THE ADVISED AREA WILL
  RANGE FROM 3 TO 6 INCHES. 

* WINDS/VISIBILITIES...NORTHEAST WINDS OF 5 TO 10 MPH WILL
  STEADILY INCREASE LATE TONIGHT INTO WEDNESDAY. BY LATE WEDNESDAY
  MORNING WINDS WILL BE 15 TO 20 MPH AND GUSTING TO AROUND 30 MPH.
  THE COMBINATION OF GUSTY WINDS AND FALLING SNOW WILL PRODUCE
  VISIBILITIES LESS THAN 1/2 MILE.

* IMPACTS...ROADS WILL BECOME SNOW COVERED AND SLIPPERY AND
  VISIBILITIES WILL BE REDUCED. THESE CONDITIONS WILL MAKE MAKING
  TRAVEL VERY DIFFICULT.

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 AND WHEN APPROACHING AND DRIVING OVER RAILROAD CROSSINGS.

&&

$$

LIEBL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
1037 AM MST MON DEC 17 2012

.AVIATION...18Z TAF ISSUANCE...
PERIODS OF MVFR CEILINGS AND VISIBILITIES IN SNOW WILL BEGIN OVER
THE LOWER ELEVATIONS OF CARBON COUNTY AFTER 23Z AND CONTINUE
THROUGH TUESDAY MORNING.  THE SNOWY AND SIERRA MADRE RANGES WILL
BE OBSCURED DURING THAT TIME. OTHERWISE...VFR CONDITIONS CAN BE
EXPECTED OVER THE CWA THROUGH 18Z TUESDAY.  CLOUD BASES WILL
LOWER TUESDAY AFTERNOON AND EVENING OVER THE ENTIRE CWA.  BY 06Z
WEDNESDAY...MUCH OF THE CWA WILL HAVE MVFR CEILINGS AND
VISIBILITIES IN SNOW WHICH WILL LOWER TO IFR BY 12Z WEDNESDAY.

WESTERLY SURFACE WINDS WILL GUST AS HIGH AS 55 KNOTS IN AREAS
ALONG AND WEST OF THE LARAMIE RANGE THROUGH 00Z WITH A MODERATE
WAVE EXPECTED TO THE LEE OF THE SNOWY AND SIERRA MADRE RANGES
AND LARAMIE PEAK. FURTHER EAST...THE WINDS WILL GUST AS HIGH
AS 35 KNOTS THROUGH 00Z.

.UPDATE...CURRENT FORECAST FOR TODAY LOOKS GOOD WITH STRONG WINDS
THE PRIMARY CONCERN. GUSTS AROUND 60 MPH HAVE ALREADY BEEN
OBSERVED ALONG AND WEST OF INTERSTATE 25...AND THESE WINDS SHOULD
BECOME A LITTLE STRONGER THIS AFTERNOON. DOWNSLOPE WINDS SHOULD
PREVENT SNOWFALL FROM DEVELOPING ACROSS THE VALLEYS AND HIGH
PLAINS...ALTHOUGH A FEW SNOW SHOWERS ARE POSSIBLE THIS AFTERNOON
ACROSS THE LOWER ELEVATIONS OF CARBON COUNTY. THESE DOWNSLOPE
WINDS...ALONG WITH THE LACK OF DEEP LLVL LIFT...MAY PREVENT VALLEY
LOCATIONS FROM RECEIVING MUCH SNOWFALL AT ALL THROUGH TUESDAY
AFTERNOON. WILL CONSIDER DELAYING THE WINTER STORM WARNING UNTIL
TUESDAY NIGHT IN THESE AREAS.

&&

.PREV DISCUSSION... /ISSUED 551 AM MST MON DEC 17 2012/

SHORT TERM...TODAY THROUGH WEDNESDAY...
MODELS COMING CLOSER IN LINE WITH SNOWFALL AMOUNTS AND PLACEMENT
OVER THE NEXT FEW DAYS...ALTHOUGH CONSIDERING THE UPPER LEVEL
DISTURBANCE IS STILL OFF THE WEST COAST...THE STORM TRACK IS
ALMOST CERTAIN TO CHANGE SOMEWHAT. MAIN CHANGES TO THE FORECAST
THROUGH WEDNESDAY AFTERNOON WAS TO INCREASE POPS AND SNOW AMOUNTS
ACROSS THE SOUTH WITH DECREASING CHANCES OF SNOW NORTH. CURRENTLY
IT IS LOOKING LIKE NORTHERN NIOBRARA AND CONVERSE COUNTIES WILL
STAY DRY WHILE SEVERAL INCHES OF SNOW MAY OCCUR NEAR THE COLORADO
BORDER TUESDAY NIGHT INTO WEDNESDAY. OF COURSE MUCH HIGHER AMOUNTS
OF SNOW ARE EXPECTED INTO SNOWY AND SIERRA MADRE RANGES. IN FACT
UPWARDS OF AN ADDITIONAL 2 TO 3 FEET OF SNOW ARE EXPECTED.

ONE OF THE BIG CHALLENGES TODAY WAS HAZARD HEADLINES. THE HIGH
WIND WARNING REMAINS IN EFFECT FOR TODAY OVER MUCH OF SOUTHEAST
WYOMING. UP TO THIS POINT WINDS HAVE BEEN WELL BEHAVED...MAINLY
STAYING BELOW WARNING CRITERIA EARLY THIS MORNING...BUT THAT WILL
CHANGE AS THE GRADIENT INCREASE ALONG WITH DEEPER MIXING
DEVELOPING AFTER SUNRISE. WILL HAVE TO KEEP AN EYES ON THE WINDS
NEAR THE WYOMING AND NEBRASKA BORDER THIS AFTERNOON. MODELS DIFFER
ON THE STRENGTH OF WINDS ALOFT AND THE POTENTIAL FOR WINDS TO MIX
TO THE SURFACE. LOOKING AT PROGGED SOUNDINGS THIS AFTERNOON...THE
GFS SUGGESTS WIND WARNING TYPE WINDS REACHING AS FAR EAST AS THE
NEBRASKA BORDER WITH ADVISORY WINDS INTO THE WESTERN TIER OF
COUNTIES IN THE NEBRASKA PANHANDLE. GUIDANCE IS NOT SUPPORTIVE OF
THIS AND NEITHER IS THE NAM. THIS BEING THE CASE...HELD OFF ON
WIND HEADLINES IN THESES AREA...BUT SOMETHING TO WATCH CLOSELY.
FORTUNATELY DEEP MIXING IS TOUGH TO COME BY THIS TIME OF YEAR
GIVEN THE SHORT PERIOD OF SOLAR HEATING. ALSO WORTH MENTIONING AS
ARES WEST OF THE LARAMIE RANGE WILL SEE FALLING SNOW COMBINE WITH
THE WINDS TO PRODUCE LOW VISIBILITIES TODAY...PARTICULARLY THIS
AFTERNOON AND EARLY EVENING. TRAVEL MAY BE VERY DIFFICULT BETWEEN
RAWLINS AND LARAMIE...ESPECIALLY IN THE ARLINGTON AREA.

A FEW CHANGES WERE MADE TO THE WINTER WEATHER HEADLINES. DROPPED
THE WINTER WEATHER ADVISORY FOR THE NORTHERN LARAMIE RANGE. WINDS
WILL BE VERY STRONG IN THIS AREA TODAY...BUT WITH A DEARTH OF SNOW
ON THE GROUND...BLOWING AND DRIFTING IS NOT EXPECTED TO BE AN ISSUE.
ALSO...CHANCES FOR ANY MEASURABLE SNOW TODAY OR TONIGHT IS VERY
LOW. MAY PICK UP A TENTH OR TWO OF SNOW SHOULD THINGS SHIFT
NORTH...OTHERWISE SHOULD BE DRY.

EXTENDED THE WINTER STORM WARNING OVER THE SNOWY AND SIERRA RANGES
THROUGH WEDNESDAY AFTERNOON. ALL MODELS CONTINUE TO PRODUCE SNOW
OVER THIS AREA THROUGH TUESDAY NIGHT...THEN TAPERING OFF
WEDNESDAY. STRONGEST WINDS WILL BE OVER THESE MOUNTAINS TODAY AND
TONIGHT...PRODUCING NEAR ZERO VISIBILITIES AND SIGNIFICANT
DRIFTING. WINDS WILL SUBSIDE LATER TONIGHT AND TUESDAY BUT SNOW
RATE SHOULD INCREASE WITH PERIODS OF HEAVY SNOW POSSIBLE TUESDAY
NIGHT.

STARTED THE WINTER STORM WARNING FOR FAR SOUTHWEST CARBON COUNTY
AND THE LOWER ELEVATION AREA BETWEEN THE SNOWIES AND SIERRA MADRE
RANGE AT 9 AM THIS MORNING AND CONTINUE IT THROUGH TUESDAY NIGHT.
TRICKY AREA...AS SNOW AMOUNTS TODAY ARE ONLY EXPECTED TO BE A FEW
INCHES. HOWEVER...SNOW ALREADY ON THE GROUND...COMBINED WITH
FALLING SNOW AND STRONG WINDS WILL PRODUCE LOW VISIBILITIES AND
PRODUCE DRIFTING SNOW. WINDS WILL DECREASE INTO TUESDAY...BECOMING
LIGHT BUT SNOW WILL CONTINUE TO FALL AND MAY INCREASE IN
INTENSITY. TOTAL SNOW AMOUNTS IN THIS AREA SHOULD RANGE FROM 6 TO
10 INCHES THROUGH TUESDAY NIGHT.

LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY...THE STORM SYSTEM WILL
MOVE OFF TO THE EAST WEDNESDAY NIGHT WITH THE THERMAL TROUGH AXIS
MOVING OVERHEAD AS WELL. THE COLDEST TEMPERATURES OF THE PERIOD WILL
OCCUR AT THIS TIME WITH CLEARING SKIES OVERHEAD AND 700MB
TEMPERATURES OF -15C TO -20C EARLY IN THE NIGHT. SFC HIGH PRESSURE
BUILDING ACROSS WESTERN COLORADO WILL RE-INTENSIFY THE LLVL PRESSURE
GRADIENT ALONG THE ROCKIES...SO DO EXPECT WINDS TO INCREASE THROUGH
THE NIGHT. INITIAL TEMPERATURES GENERALLY IN THE SINGLE DIGITS TO
BELOW ZERO READINGS IN SOME OF THE HIGH VALLEYS AND MOUNTAINS PEAKS
OUT WEST WILL MODERATE THROUGH THE NIGHT AS WINDS INCREASE.
HOWEVER...THERE WILL BE A PERIOD OF WIND CHILL TEMPERATURES THAT
LOOK TO DROP BETWEEN -15F AND -25F EARLY IN THE NIGHT OUT WEST AS
THE WINDS INITIALLY PICK UP...WITH 0F TO -15F READINGS ACROSS THE
EASTERN PLAINS. AGAIN...WIND CHILLS WILL MODERATE SOMEWHAT AS THE
WINDS INCREASE AND NUDGE UP TEMPERATURES...BUT WILL LIKELY REMAIN
BELOW ZERO THROUGH THE NIGHT. WINDS WILL BECOME QUITE STRONG AS THE
GRADIENT STRENGTHENS AND WARM AIR ADVECTION ALOFT STRENGTHENS THE
LLVL INVERSION BY EARLY THURSDAY MORNING. COULD SEE THE NEXT HIGH
WIND EVENT EARLY IN THE MORNING AND CONTINUING THROUGH THE EVENING
WITH 700 MB WINDS FORECAST TO BE 50 TO 55KTS THROUGH THIS TIME.

A STRONG UPPER LOW WILL THEN BECOME QUASISTATIONARY OVER THE
NORTHEAST PACIFIC THURSDAY THROUGH SATURDAY WHICH WILL BUILD A RIDGE
OF HIGH PRESSURE OVER THE CENTRAL CONUS THROUGH THIS TIME...KEEPING
THE CWA IN A SOUTHWEST FLOW PATTERN. THE MAIN JET STREAM CORE AND
MOISTURE PLUME WILL REMAIN WELL NORTH AND WEST OF THE AREA AS A
RESULT...SO EXPECT DRY CONDITIONS WITH TEMPERATURES MODERATING BACK
INTO THE 30S AND 40S FOR THE FORECAST AREA. BREEZY WEST TO SOUTHWEST
WINDS WILL PREVAIL THROUGH THIS TIME AS WELL...BUT DO NOT SEE ANY
INDICATION OF HIGH WIND EVENTS THROUGH THIS PERIOD.

MODELS THEN SHOW THIS UPPER LOW DISLODGING FROM THE EAST PAC AND
MOVING INLAND ON SATURDAY NIGHT AND SUNDAY. DETAILS WITH THE TROUGH
MOVEMENT AND EMBEDDED SHORTWAVES DIFFER GREATLY BETWEEN MODELS...BUT
SEE A TREND TOWARD INCREASING CHANCES FOR PRECIP IN THE HIGHER
ELEVATIONS FOR SUNDAY NIGHT AS THE TROUGH APPROACHES.

AVIATION...12Z ISSUANCE...WEST TO SOUTHWEST WINDS WILL BE ON THE
STEADY INCREASE THIS MORNING ACROSS SOUTHEAST WYOMING...AND EARLY
THIS AFTERNOON ACROSS THE NEBRASKA PANHANDLE. EXPECTING GUSTS OF
45 TO 50 KTS AT THE WYOMING TERMINALS ROUGHLY BETWEEN 17 AND 00Z
TODAY...WITH STRONGER WINDS LIKELY IN THE WIND CORRIDOR ALONG AND
WEST OF THE LARAMIE RANGE. GUSTS OF 30 TO 35 KTS ARE LIKELY AT THE
NEBRASKA TERMINALS IN THE AFTERNOON AS WELL. OVERALL...WINDS WILL
DIMINISH THIS EVENING...BUT WILL REMAIN BREEZY OVERNIGHT. EXPECT
MODERATE TO SEVERE MOUNTAIN WAVE TURBULENCE TODAY WITH THESE
STRONG WINDS.

IN ADDITION...SNOW WILL BE A CONCERN OVER AND NEAR THE MOUNTAINS
THROUGH THE PERIOD. MVFR CIGS AND VSBYS WILL MOVE INTO KRWL THIS
MORNING AS LIGHT SNOW BEGINS...WITH PERIODS OF MODERATE SNOW
BRINGING MORE IFR CONDITIONS AT TIMES AFTER 18Z. MVFR CONDITIONS IN
LIGHT SNOW ARE ALSO A POSSIBILITY AT KLAR AFTER SUNSET TONIGHT. THE
MOUNTAINS WILL REMAIN OBSCURED THROUGH THE PERIOD.

FIRE WEATHER...
NO FIRE WEATHER CONCERNS THROUGH THIS WEEK. VERY STRONG WINDS ACROSS
SOUTHEAST WYOMING TODAY AND BREEZY IN THE NEBRASKA PANHANDLE. SNOW
WILL FALL MAINLY WEST OF THE LARAMIE RANGE TODAY AND TONIGHT...THEN
IS EXPECTED TO SPREAD INTO THE PLAINS OF SOUTHEAST WYOMING LATE
TUESDAY AND INTO THE NEBRASKA PANHANDLE TUESDAY NIGHT/WEDNESDAY.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...WINTER STORM WARNING UNTIL 6 PM WEDNESDAY FOR WYZ112-WYZ114.
     WINTER STORM WARNING UNTIL 6 AM WEDNESDAY FOR WYZ111-WYZ113.
     HIGH WIND WARNING UNTIL 5 PM MONDAY FOR WYZ101-WYZ104-WYZ105-
     WYZ106-WYZ107-WYZ109-WYZ110-WYZ115-WYZ116-WYZ117-WYZ118.
NE...NONE.

&&

SHORT TERM/FIRE WEATHER...TJT
LONG TERM/AVIATION...WEILAND

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHEYENNE WY
635 AM MST MON DEC 17 2012

WYZ101>119-181345-
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-
635 AM MST MON DEC 17 2012

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

.DAY ONE...TODAY AND TONIGHT

WINDS WILL INCREASE ACROSS MUCH OF SOUTHEAST WYOMING THIS MORNING
AND WILL BE STRONG IN MANY AREAS THROUGH THE LATE AFTERNOON. WEST
TO SOUTHWEST WINDS OF 35 TO 50 MPH WITH GUSTS UP TO 70 MPH ARE
POSSIBLE IN THE WIND CORRIDOR ALONG AND WEST OF THE LARAMIE RANGE.
THIS INCLUDES THE ARLINGTON AREA...THE SOUTHERN LARAMIE RANGE NEAR
VEDAUWOO...AND ALONG INTERSTATE 25 NEAR BORDEAUX.
ELSEWHERE...WIND GUSTS OF 50 TO 60 MPH ARE EXPECTED. A HIGH WIND
WARNING IS IN EFFECT THROUGH LATE THIS AFTERNOON FOR AREAS THAT
COULD SEE THE STRONGER GUSTS OF 60 TO 70 MPH.

SNOW WILL CONTINUE OVER THE SNOWY AND SIERRA MADRE MOUNTAINS TODAY
AND TONIGHT...WITH A FEW SNOW SHOWERS MOVING OFF THE MOUNTAINS
INTO THE NEARBY VALLEY LOCATIONS. ACCUMULATIONS OF 5 TO 12 INCHES
ARE POSSIBLE IN THESE MOUNTAINS TODAY AND TONIGHT...WITH 2 TO 4
INCHES AT LOCATIONS SUCH AS BAGGS AND SARATOGA. AN INCH OR LESS
WILL OCCUR ELSEWHERE IN THE HIGH COUNTRY. A WINTER STORM WARNING
IS IN EFFECT FOR SOUTHERN CARBON COUNTY WHERE A PROLONGED PERIOD
OF HEAVY SNOW WILL BEGIN TODAY...ALONG WITH NEAR WHITE OUT
CONDITIONS IN STRONG WINDS.

HAZARDOUS BLOWING SNOW CONDITIONS WILL OCCUR ELSEWHERE ACROSS THE
HIGH COUNTRY...ESPECIALLY ALONG THE INTERSTATE 80 CORRIDOR
BETWEEN RAWLINS AND CHEYENNE. SIGNIFICANTLY REDUCED VISIBILITIES
IN ADDITION TO SLIPPERY AND SNOWPACKED ROADS WILL MAKE TRAVEL
DIFFICULT IN THESE AREAS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

MODERATE SNOW WILL CONTINUE IN THE SNOWY AND SIERRA MADRE
MOUNTAINS AND NEARBY LOWER ELEVATIONS SUCH AS BAGGS AND SARATOGA
TUESDAY THROUGH WEDNESDAY. THE WINTER STORM WARNING FOR HEAVY SNOW
WILL REMAIN IN EFFECT FOR THESE AREAS THROUGH WEDNESDAY AS AROUND
2 FEET OF SNOW IS EXPECTED IN THESE MOUNTAINS...WITH 6 TO 10
INCHES OF SNOW EXPECTED AT BAGGS AND SARATOGA. SNOW WILL ALSO
SPREAD ELSEWHERE ACROSS SOUTHEAST WYOMING TUESDAY NIGHT INTO
WEDNESDAY. THE MAIN THREAT FOR SNOW WILL BE ALONG AND NEAR THE
INTERSTATE 80 CORRIDOR WHERE SEVERAL INCHES OF ACCUMULATION IS
POSSIBLE.

VERY COLD TEMPERATURES ARE LIKELY TUESDAY NIGHT AND WEDNESDAY
NIGHT...WITH THE COLDEST PERIOD BEING WEDNESDAY NIGHT WHEN WIND
CHILLS WILL DROP BETWEEN MINUS 5 AND MINUS 25 DEGREES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT.

&&

THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND
CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT...
HTTP://WEATHER.GOV/CHEYENNE

NEZ002-003-019>021-054-055-095-096-181345-
DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE-
NORTH SIOUX-SOUTH SIOUX-
635 AM MST MON DEC 17 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA
PANHANDLE.

.DAY ONE...TODAY AND TONIGHT

WEST WINDS GUSTING 35 TO 45 MPH CAN BE EXPECTED THIS AFTERNOON AND
EARLY EVENING ACROSS MUCH OF THE NEBRASKA PANHANDLE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

SNOW WILL LIKELY OCCUR TUESDAY NIGHT THROUGH WEDNESDAY OVER MUCH
OF THE NEBRASKA PANHANDLE. THE BEST CHANCE FOR SNOW WILL BE OVER
THE SOUTHERN HALF OF THE PANHANDLE WHERE A FEW INCHES OF SNOW MAY
BE POSSIBLE BY WEDNESDAY EVENING.

VERY COLD TEMPERATURES ARE LIKELY WEDNESDAY NIGHT...WITH WIND CHILLS
DROPPING BETWEEN ZERO AND MINUS 15 DEGREES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT.

&&

THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND
CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT...
HTTP://WEATHER.GOV/CHEYENNE

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1244 PM MST MON DEC 17 2012

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

1200 PM     SNOW             35 S RAWLINS            41.28N 107.23W
12/17/2012  E1.5 INCH        CARBON             WY   PARK/FOREST SRVC

            SAGE CREEK BASIN SNOTEL IN THE SIERRA MADRE RANGE.
            ELEVATION 7850 FEET. SNOW WATER EQUIVALENT IS 0.1 INCHES
            AND THE SNOW TO LIQUID RATIO USED WAS 15 TO 1.
            ACCUMULATION WAS OVER PAST 24 HOURS.

1200 PM     SNOW             38 SW DOUGLAS           42.37N 105.92W
12/17/2012  E1.5 INCH        ALBANY             WY   PARK/FOREST SRVC

            LA PRELE CREEK SNOTEL IN THE LARAMIE RANGE.  ELEVATION
            8375 FEET.  SNOW WATER EQUIVALENT IS 0.1 INCHES AND THE
            SNOW TO LIQUID RATIO USED WAS 15 TO 1. ACCUMULATION WAS
            OVER PAST 24 HOURS.

1200 PM     SNOW             12 SW ESTERBROOK        42.29N 105.53W
12/17/2012  E1.0 INCH        CONVERSE           WY   PARK/FOREST SRVC

            WINDY PEAK SNOTEL IN THE LARAMIE RANGE. ELEVATION 7900
            FEET.  SNOW WATER EQUIVALENT IS 0.1 INCHES AND THE SNOW
            TO LIQUID RATIO USED WAS 10 TO 1. ACCUMULATION WAS OVER
            PAST 24 HOURS.

1200 PM     SNOW             6 SW CENTENNIAL         41.24N 106.19W
12/17/2012  E6.0 INCH        ALBANY             WY   PARK/FOREST SRVC

            CINNABAR PARK SNOTEL IN THE SNOWY RANGE.  ELEVATION 9574
            FEET.  SNOW WATER EQUIVALENT IS 0.3 INCHES AND THE SNOW
            TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER
            PAST 24 HOURS.

1200 PM     SNOW             7 NW CENTENNIAL         41.37N 106.21W
12/17/2012  E10.0 INCH       ALBANY             WY   PARK/FOREST SRVC

            BROOKLYN LAKE SNOTEL IN THE SNOWY RANGE.  ELEVATION 10240
            FEET.  SNOW WATER EQUIVALENT IS 0.5 INCHES AND THE SNOW
            TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER
            PAST 24 HOURS.

1200 PM     SNOW             30 WNW LARAMIE          41.48N 106.12W
12/17/2012  E8.0 INCH        CARBON             WY   PARK/FOREST SRVC

            SAND LAKE SNOTEL IN THE SNOWY RANGE.  ELEVATION 10050
            FEET.  SNOW WATER EQUIVALENT IS 0.4 INCHES AND THE SNOW
            TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER
            PAST 24 HOURS.

1200 PM     SNOW             12 WNW CENTENNIAL       41.37N 106.32W
12/17/2012  E2.0 INCH        ALBANY             WY   PARK/FOREST SRVC

            NORTH FRENCH CREEK SNOTEL IN THE SNOWY RANGE.  ELEVATION
            10130 FEET.  SNOW WATER EQUIVALENT IS 0.1 INCHES AND THE
            SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS
            OVER PAST 24 HOURS.

1200 PM     SNOW             17 ENE RIVERSIDE        41.31N 106.48W
12/17/2012  E1.5 INCH        CARBON             WY   PARK/FOREST SRVC

            SOUTH BRUSH CREEK SNOTEL IN THE SNOWY RANGE.  ELEVATION
            8440 FEET.  SNOW WATER EQUIVALENT IS 0.1 INCHES AND THE
            SNOW TO LIQUID RATIO USED WAS 15 TO 1. ACCUMULATION WAS
            OVER PAST 24 HOURS.

1200 PM     SNOW             11 SSE ENCAMPMENT       41.06N 106.71W
12/17/2012  E16.0 INCH       CARBON             WY   PARK/FOREST SRVC

            BLACKHALL MOUNTAIN SNOTEL IN THE SIERRA MADRE RANGE.
            ELEVATION 9820 FEET.  SNOW WATER EQUIVALENT IS 0.8 INCHES
            AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1.
            ACCUMULATION WAS OVER PAST 24 HOURS.

1200 PM     SNOW             28 E SAVERY             41.02N 106.91W
12/17/2012  E12.0 INCH       CARBON             WY   PARK/FOREST SRVC

            WHISKEY PARK SNOTEL IN THE SIERRA MADRE RANGE.  ELEVATION
            8950 FEET.  SNOW WATER EQUIVALENT IS 0.6 INCHES AND THE
            SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS
            OVER PAST 24 HOURS.

1200 PM     SNOW             5 SW ENCAMPMENT         41.16N 106.86W
12/17/2012  E12.0 INCH       CARBON             WY   PARK/FOREST SRVC

            WEBBER SPRINGS SNOTEL IN THE SIERRA MADRE RANGE.
            ELEVATION 9250 FEET. SNOW WATER EQUIVALENT IS 0.6 INCHES
            AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1.
            ACCUMULATION WAS OVER PAST 24 HOURS.

1200 PM     SNOW             10 WSW ENCAMPMENT       41.15N 106.97W
12/17/2012  E12.0 INCH       CARBON             WY   PARK/FOREST SRVC

            OLD BATTLE SNOTEL IN THE SIERRA MADRE RANGE.  ELEVATION
            10000 FEET.  SNOW WATER EQUIVALENT IS 0.6 INCHES AND THE
            SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS
            OVER PAST 24 HOURS.

1200 PM     SNOW             17 SW ENCAMPMENT        41.03N 107.03W
12/17/2012  E1.5 INCH        CARBON             WY   PARK/FOREST SRVC

            SANDSTONE RANGER STATION SNOTEL IN THE SIERRA MADRE
            RANGE.  ELEVATION 8150 FEET.  SNOW WATER EQUIVALENT IS
            0.1 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 15 TO 1.
            ACCUMULATION WAS OVER PAST 24 HOURS.

1200 PM     SNOW             14 E DIXON              41.03N 107.27W
12/17/2012  E1.5 INCH        CARBON             WY   PARK/FOREST SRVC

            BATTLE MOUNTAIN SNOTEL IN THE SIERRA MADRE RANGE.
            ELEVATION 7440 FEET.  SNOW WATER EQUIVALENT IS 0.1 INCHES
            AND THE SNOW TO LIQUID RATIO USED WAS 15 TO 1.
            ACCUMULATION WAS OVER PAST 24 HOURS.

1200 PM     SNOW             19 WSW ENCAMPMENT       41.10N 107.13W
12/17/2012  E1.5 INCH        CARBON             WY   PARK/FOREST SRVC

            DIVIDE PEAK SNOTEL IN THE SIERRA MADRE RANGE.  ELEVATION
            8880 FEET.  SNOW WATER EQUIVALENT IS 0.1 INCHES AND THE
            SNOW TO LIQUID RATIO USED WAS 15 TO 1. ACCUMULATION WAS
            OVER PAST 24 HOURS.

&&

HAMMER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
104 PM MST MON DEC 17 2012

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

1115 AM     NON-TSTM WND GST 14 WSW CHEYENNE         41.07N 105.04W
12/17/2012  M72.00 MPH       LARAMIE            WY   MESONET

            EMKAY UPR SITE. MAY BE INFLUENCED BY LOCAL TERRAIN AND
            NOT REPRESENTATIVE OF SURROUNDING AREAS.

1131 AM     NON-TSTM WND GST 16 E HORSE CREEK        41.41N 104.87W
12/17/2012  M63.00 MPH       LARAMIE            WY   DEPT OF HIGHWAYS

            WHITAKER WYDOT SITE.

1200 PM     NON-TSTM WND GST 10 SW CHEYENNE          41.04N 104.93W
12/17/2012  M66.00 MPH       LARAMIE            WY   DEPT OF HIGHWAYS

            WYO HILL WYDOT SITE. SUSTAINED AT 50 MPH.

1206 PM     NON-TSTM WND GST 23 W CHEYENNE           41.14N 105.23W
12/17/2012  M58.00 MPH       LARAMIE            WY   DEPT OF HIGHWAYS

            REMOUNT ROAD WYDOT SITE. SUSTAINED AT 47 MPH.

1211 PM     NON-TSTM WND GST 13 S GLENDO             42.32N 105.03W
12/17/2012  M66.00 MPH       PLATTE             WY   DEPT OF HIGHWAYS

            COLEMAN WYDOT SITE. SUSTAINED AT 50 MPH.

1223 PM     NON-TSTM WND GST 9 WSW BURNS             41.14N 104.52W
12/17/2012  M66.00 MPH       LARAMIE            WY   MESONET

1230 PM     NON-TSTM WND GST 9 S WHEATLAND           41.92N 104.96W
12/17/2012  M71.00 MPH       PLATTE             WY   DEPT OF HIGHWAYS

            BORDEAUX WYDOT SITE. SUSTAINED AT 53 MPH.

&&

HAMMER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
215 PM MST MON DEC 17 2012

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

1145 AM     NON-TSTM WND DMG 8 SW CHEYENNE           41.06N 104.90W
12/17/2012                   LARAMIE            WY   DEPT OF HIGHWAYS

            SEMI OVERTURNED NEAR MILEPOST 4 ALONG INTERSTATE 25.

1243 PM     NON-TSTM WND DMG BORDEAUX                41.95N 104.95W
12/17/2012                   PLATTE             WY   DEPT OF HIGHWAYS

            SEMI OVERTURNED NEAR MILEPOST 71 ALONG INTERSTATE 25.

&&

HAHN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
217 PM MST MON DEC 17 2012

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

0130 PM     NON-TSTM WND GST ROCK RIVER              41.73N 105.98W
12/17/2012  M51 MPH          ALBANY             WY   MESONET

            REPORTED AT MESOWEST STATION UR345

&&

IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
218 PM MST MON DEC 17 2012

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

0120 PM     NON-TSTM WND GST 1 NNW WHITAKER          41.42N 104.87W
12/17/2012  M52 MPH          LARAMIE            WY   MESONET

            REPORTED AT WYDOT STATION KWTR

&&

IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
219 PM MST MON DEC 17 2012

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

0145 PM     NON-TSTM WND GST 10 WSW WARREN AF BASE   41.08N 105.04W
12/17/2012  M64 MPH          LARAMIE            WY   MESONET

            REPORTED AT MESOWEST STATION UP226

&&

IRIS SYSTEM