High Wind Warning 22, NWS Riverton, WY

000 
WWUS75 KRIW 242153
NPWRIW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
253 PM MST WED DEC 24 2008

...STRONG WINDS EXPECTED ACROSS PORTIONS OF CENTRAL WYOMING THROUGH
CHRISTMAS DAY...

.A STRENGTHENING SOUTHWEST FLOW AHEAD OF A POWERFUL PACIFIC STORM
SYSTEM WILL LIKELY BRING HIGH WINDS ACROSS THE GREEN MOUNTAINS AND
RATTLESNAKE RANGE...INTO THE CASPER AREA THIS EVENING THROUGH
CHRISTMAS DAY. STRONG SOUTHWEST WINDS ARE ALSO POSSIBLE ACROSS
EASTERN SWEETWATER COUNTY CHRISTMAS DAY. THESE WINDS WILL LIKELY
ALSO CAUSE AREAS OF BLOWING SNOW AND LIMITED VISIBILITY.

WYZ019-250600-
/O.CON.KRIW.HW.W.0022.000000T0000Z-081226T0000Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
INCLUDING THE CITY OF...JEFFREY CITY
253 PM MST WED DEC 24 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THURSDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THURSDAY. 

SOUTHWEST WINDS ALONG WITH AREAS OF BLOWING SNOW RESULTING IN
LOWERED VISIBILITY WILL CONTINUE THROUGH TONIGHT. SUSTAINED WIND SPEEDS
OF 35 TO 45 MPH AND GUSTS NEAR 60 MPH ARE EXPECTED. THESE STRONG WINDS AND
AREAS OF BLOWING SNOW CONTINUE THROUGH CHRISTMAS DAY.

BRING INDOORS ANY LOOSE ITEMS. HIGHWAYS 220 WILL BE IMPACTED BY
THESE STRONG WINDS. IF OUT DRIVING IN THESE AREAS ANTICIPATE
DANGEROUS CROSS WINDS AND LOWERED VISIBILITY AT TIMES DUE TO THE
BLOWING SNOW.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ020-250600-
/O.CON.KRIW.HW.W.0022.000000T0000Z-081226T0000Z/
NATRONA COUNTY LOWER ELEVATIONS-
INCLUDING THE CITY OF...CASPER
253 PM MST WED DEC 24 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THURSDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THURSDAY. 

SOUTHWEST WINDS ALONG WITH AREAS OF BLOWING SNOW RESULTING IN
AREAS OF LOWERED VISIBILITY WILL CONTINUE THROUGH TONIGHT. SUSTAINED
WIND OF 35 TO 45 MPH AND GUSTS NEAR 60 MPH ARE EXPECTED. THESE STRONG
WINDS AND AREAS OF BLOWING SNOW CONTINUE THROUGH CHRISTMAS DAY.

BRING INDOORS ANY LOOSE ITEMS. WYOMING BOULEVARD IN THE SOUTHERN
PORTION OF THE CASPER AREA WILL BE ESPECIALLY VULNERABLE TO THE
STRONG WINDS AND BLOWING SNOW. IF OUT DRIVING IN THESE AREAS
ANTICIPATE DANGEROUS CROSS WINDS AS WELL AS LOWERED VISIBILITY AT
TIMES DUE TO THE BLOWING SNOW.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ030-250600-
/O.NEW.KRIW.HW.A.0014.081225T1200Z-081226T0000Z/
EAST SWEETWATER COUNTY-
INCLUDING THE CITY OF...WAMSUTTER
253 PM MST WED DEC 24 2008

...HIGH WIND WATCH IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY
AFTERNOON...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND
WATCH...WHICH IS IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY
AFTERNOON. 

STRONG SOUTHWEST WINDS OF 35 TO 45 MPH WITH GUSTS TO 60 MPH ARE
POSSIBLE ACROSS EASTERN SWEETWATER COUNTY EARLY CHRISTMAS MORNING
THROUGH THE REST OF THURSDAY. THESE STRONG WINDS WILL HAVE THE
POTENTIAL TO PRODUCE AREAS OF BLOWING SNOW AND LIMITED VISIBILITY
ACROSS THE AREA THURSDAY.

INTERSTATE 80 THROUGH EASTERN SWEETWATER COUNTY MAY BE IMPACTED
BY THESE STRONG WINDS AND BLOWING SNOW. ANTICIPATE DANGEROUS
CROSS WINDS IN THESE AREAS.

REMEMBER...A HIGH WIND WATCH MEANS CONDITIONS ARE FAVORABLE FOR A
HAZARDOUS HIGH WIND EVENT IN AND CLOSE TO THE WATCH AREA.

$$

LIPSON

000 
WWUS75 KRIW 250357
NPWRIW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
857 PM MST WED DEC 24 2008

...STRONG GUSTY WIND EXPECTED ACROSS PORTIONS OF CENTRAL AND
SOUTHWEST WYOMING THROUGH CHRISTMAS DAY...

.SOUTHWEST FLOW WILL INCREASE OVER WYOMING IN ADVANCE OF AN APPROACHING
SYSTEM DIVING INTO THE INTERMOUNTAIN WEST. HIGH WINDS ARE EXPECTED
TO INCREASE AND BECOME MORE PREVALENT ACROSS PORTIONS OF CENTRAL
AND SOUTHWEST WYOMING BEGINNING EARLY CHRISTMAS DAY AHEAD OF THIS
SYSTEM.

WYZ019-251300-
/O.CON.KRIW.HW.W.0022.000000T0000Z-081226T0000Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
INCLUDING THE CITY OF...JEFFREY CITY
857 PM MST WED DEC 24 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THURSDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THURSDAY. 

SOUTHWEST WIND OF 30 TO 40 MPH WITH GUSTS NEAR 60 MPH WILL BE
COMMON OVERNIGHT. THESE SPEEDS WILL INCREASE AROUND SUNRISE AND
CONTINUE THROUGH CHRISTMAS DAY. DAYTIME WIND SPEEDS OF 40 TO 50
MPH WITH GUSTS BETWEEN 60 AND 70 MPH ARE POSSIBLE.

MOTORISTS ON HIGHWAY 287 WILL BE IMPACTED BY HAZARDOUS
CROSSWINDS...PARTICULARLY DURING THE DAY ON CHRISTMAS. IF YOU PLAN
ON TRAVELING ALONG HIGHWAY 287 BE ALERT TO SUDDEN WIND GUSTS AND
POSSIBLY AREAS WITH REDUCED VISIBILITY DUE TO BLOWING SNOW.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ020-251300-
/O.CON.KRIW.HW.W.0022.000000T0000Z-081226T0000Z/
NATRONA COUNTY LOWER ELEVATIONS-
INCLUDING THE CITY OF...CASPER
857 PM MST WED DEC 24 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THURSDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THURSDAY. 

SOUTHWEST WIND OF 30 TO 40 MPH WITH GUSTS NEAR 50 MPH WILL BE
COMMON OVERNIGHT. THESE SPEEDS WILL INCREASE AROUND SUNRISE AND
CONTINUE THROUGH CHRISTMAS DAY. DAYTIME WIND SPEEDS OF 35 TO 45 MPH
WITH GUSTS AROUND 60 MPH ARE POSSIBLE. AREAS ALONG WYOMING
BOULEVARD AND IN SOUTHWEST CASPER NEAR C Y AVENUE CAN EXPECT
OCCASIONAL HIGHER GUSTS BETWEEN 60 AND 70 MPH.

MOTORISTS ON HIGHWAY 220 WILL BE IMPACTED BY THE GUSTY WIND...
PARTICULARLY DURING THE DAY ON CHRISTMAS. IF YOU PLAN ON
TRAVELING ALONG HIGHWAY 220 FROM CASPER TO INDEPENDENCE ROCK...BE
ALERT TO SUDDEN WIND GUSTS AND POSSIBLY AREAS WITH REDUCED
VISIBILITY DUE TO BLOWING SNOW.


REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ030-251300-
/O.CON.KRIW.HW.A.0014.081225T1200Z-081226T0000Z/
EAST SWEETWATER COUNTY-
INCLUDING THE CITY OF...WAMSUTTER
857 PM MST WED DEC 24 2008

...HIGH WIND WATCH REMAINS IN EFFECT FROM 5 AM MST THURSDAY
THROUGH THURSDAY AFTERNOON...

A HIGH WIND WATCH REMAINS IN EFFECT FROM 5 AM MST THURSDAY
THROUGH THURSDAY AFTERNOON. 

STRONG SOUTHWEST WIND OF 35 TO 45 MPH WITH GUSTS TO AROUND 60 MPH
WILL POSSIBLY DEVELOP ACROSS EASTERN SWEETWATER COUNTY AROUND
SUNRISE ON CHRISTMAS. THESE STRONG WINDS WILL HAVE THE POTENTIAL
TO PRODUCE AREAS OF BLOWING SNOW AND LIMITED VISIBILITY ACROSS THE
AREA CHRISTMAS DAY.

INTERSTATE 80 THROUGH EASTERN SWEETWATER COUNTY MAY BE IMPACTED BY
THESE STRONG WINDS AND BLOWING SNOW. THE AREA TO BE MOST IMPACTED
WOULD BE THE STRETCH OF INTERSTATE 80 BETWEEN MILE MARKERS 130
AND 199 BETWEEN POINT OF ROCKS AND THE CARBON COUNTY LINE.
ANTICIPATE DANGEROUS CROSSWINDS IN THESE AREAS.

REMEMBER...A HIGH WIND WATCH MEANS CONDITIONS ARE FAVORABLE FOR A
HAZARDOUS HIGH WIND EVENT IN AND CLOSE TO THE WATCH AREA.

$$

TRIW

000 
WWUS75 KRIW 250956
NPWRIW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
256 AM MST THU DEC 25 2008

...HIGH WIND EXPECTED ACROSS PORTIONS OF CENTRAL AND SOUTHWEST
WYOMING TODAY...

.SOUTHWEST FLOW WILL INCREASE OVER WYOMING IN ADVANCE OF AN
APPROACHING SYSTEM DIVING INTO THE INTERMOUNTAIN WEST. HIGH WINDS
ARE EXPECTED TO INCREASE AND BECOME MORE PREVALENT ACROSS
PORTIONS OF CENTRAL AND SOUTHWEST WYOMING BEGINNING EARLY
TODAY AHEAD OF THIS SYSTEM.

WYZ030-260000-
/O.UPG.KRIW.HW.A.0014.081225T1200Z-081226T0000Z/
/O.EXB.KRIW.HW.W.0022.081225T1200Z-081226T0000Z/
EAST SWEETWATER COUNTY-
INCLUDING THE CITY OF...WAMSUTTER
256 AM MST THU DEC 25 2008

...HIGH WIND WARNING IN EFFECT UNTIL 5 PM MST THIS AFTERNOON...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. THE
HIGH WIND WATCH IS NO LONGER IN EFFECT. 

STRONG SOUTHWEST WIND OF 35 TO 45 MPH WITH GUSTS TO AROUND 60 MPH
WILL DEVELOP ACROSS EASTERN SWEETWATER COUNTY AROUND SUNRISE TODAY.
THESE STRONG WINDS WILL PRODUCE AREAS OF BLOWING SNOW AND LIMITED
VISIBILITY ACROSS THE AREA TODAY.

INTERSTATE 80 THROUGH EASTERN SWEETWATER COUNTY WILL BE IMPACTED
BY THESE STRONG WINDS AND BLOWING SNOW. THE AREA TO BE MOST
IMPACTED WILL BE THE STRETCH OF INTERSTATE 80 BETWEEN MILE
MARKERS 130 AND 199 BETWEEN POINT OF ROCKS AND THE CARBON COUNTY
LINE. ANTICIPATE DANGEROUS CROSSWINDS IN THESE AREAS.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ019-260000-
/O.CON.KRIW.HW.W.0022.000000T0000Z-081226T0000Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
INCLUDING THE CITY OF...JEFFREY CITY
256 AM MST THU DEC 25 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. 

SOUTHWEST WIND OF 30 TO 40 MPH WITH GUSTS NEAR 50 MPH WILL INCREASE
THIS MORNING AND CONTINUE THROUGH THE AFTERNOON. DAYTIME WIND
SPEEDS OF 35 TO 45 MPH WITH GUSTS AROUND 60 MPH ARE EXPECTED. AREAS 
ALONG WYOMING BOULEVARD AND IN SOUTHWEST CASPER NEAR C Y AVENUE
CAN EXPECT OCCASIONAL HIGHER GUSTS BETWEEN 60 AND 70 MPH.

MOTORISTS ON HIGHWAY 287 WILL BE IMPACTED BY HAZARDOUS
CROSSWINDS...PARTICULARLY DURING THE AFTERNOON TODAY. IF YOU
PLAN ON TRAVELING ALONG HIGHWAY 287 BE ALERT TO SUDDEN WIND GUSTS
AND POSSIBLY AREAS WITH REDUCED VISIBILITY DUE TO BLOWING SNOW.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ020-260000-
/O.CON.KRIW.HW.W.0022.000000T0000Z-081226T0000Z/
NATRONA COUNTY LOWER ELEVATIONS-
INCLUDING THE CITY OF...CASPER
256 AM MST THU DEC 25 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. 

SOUTHWEST WIND OF 30 TO 40 MPH WITH GUSTS NEAR 50 MPH WILL INCREASE
THIS MORNING AND CONTINUE THROUGH THIS AFTERNOON. DAYTIME WIND
SPEEDS OF 35 TO 45 MPH WITH GUSTS AROUND 60 MPH ARE EXPECTED. AREAS
ALONG WYOMING BOULEVARD AND IN SOUTHWEST CASPER NEAR C Y AVENUE
CAN EXPECT OCCASIONAL HIGHER GUSTS BETWEEN 60 AND 70 MPH.

MOTORISTS ON HIGHWAY 220 WILL BE IMPACTED BY THE GUSTY WIND...
PARTICULARLY DURING THE AFTERNOON. IF YOU PLAN ON TRAVELING ALONG
HIGHWAY 220 FROM CASPER TO INDEPENDENCE ROCK...BE ALERT TO SUDDEN
WIND GUSTS AND POSSIBLY AREAS WITH REDUCED VISIBILITY DUE TO
BLOWING SNOW.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

000 
WWUS75 KRIW 251819
NPWRIW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1119 AM MST THU DEC 25 2008

...HIGH WINDS EXPECTED ACROSS PORTIONS OF CENTRAL AND SOUTHWEST
WYOMING TODAY...

.A STRONG SOUTHWEST FLOW WILL CONTINUE OVER WYOMING IN ADVANCE OF
AN APPROACHING WEATHER SYSTEM DIVING INTO THE INTERMOUNTAIN WEST.
THE COMBINATION OF STRONG UPPER LEVEL WINDS LOWERING TO THE SURFACE
AND A TIGHT SURFACE PRESSURE GRADIENT WILL CAUSE HIGH WINDS TO
CONTINUE ACROSS PORTIONS OF CENTRAL AND SOUTHWEST WYOMING TODAY
AHEAD OF THIS WEATHER SYSTEM.

WYZ019-260000-
/O.CON.KRIW.HW.W.0022.000000T0000Z-081226T0000Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
INCLUDING THE CITY OF...JEFFREY CITY
1119 AM MST THU DEC 25 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. 

SOUTHWEST WIND SPEEDS OF 35 TO 45 MPH WITH GUSTS AROUND 60 MPH ARE
EXPECTED TODAY. SOME HIGHER GUSTS OF 60 TO 70 MPH ARE POSSIBLE. 

MOTORISTS ON HIGHWAYS 287 AND 122 WILL BE IMPACTED BY HAZARDOUS
CROSSWINDS. IF YOU PLAN ON TRAVELING ALONG HIGHWAY 122 FROM CASPER
TO INDEPENDENCE ROCK AS WELL AS HIGHWAY 287 FROM SWEETWATER
STATION TO THE CARBON COUNTY LINE...BE ALERT TO SUDDEN WIND GUSTS
AND POSSIBLY LOCAL AREAS WITH REDUCED VISIBILITY DUE TO BLOWING
SNOW.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ020-260000-
/O.CON.KRIW.HW.W.0022.000000T0000Z-081226T0000Z/
NATRONA COUNTY LOWER ELEVATIONS-
INCLUDING THE CITY OF...CASPER
1119 AM MST THU DEC 25 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. 

STRONG SOUTHWEST WINDS WILL CONTINUE TODAY IN THE CASPER AREA. A
SUSTAINED WIND SPEED OF 50 MPH ALONG WITH A WIND GUST OF 68 MPH
WAS REPORTED AT THE NATRONA COUNTY AIRPORT AT AROUND 11 AM THIS
MORNING. A ROOF WAS REPORTED TO HAVE BLOW OFF A STRUCTURE ON C Y
AVENUE THIS MORNING. TWO POWER POLES HAVE BEEN BLOW OVER IN THE
DOWNTOWN CASPER AREA.

SOUTHWEST WIND OF 40 TO 50 MPH WITH GUSTS OF NEAR 60 MPH WILL
CONTINUE THROUGH THIS AFTERNOON. AREAS ALONG WYOMING BOULEVARD AND
IN SOUTHWEST CASPER NEAR C Y AVENUE CAN EXPECT OCCASIONAL HIGHER
GUSTS BETWEEN 60 AND 70 MPH.

MOTORISTS IN THE AREA...PARTICULARLY ALONG WYOMING BOULEVARD AND C
Y AVENUE NEED TO BE ALERT TO SUDDEN WIND GUSTS AND POSSIBLY AREAS
WITH REDUCED VISIBILITY DUE TO BLOWING SNOW.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ030-260000-
/O.CON.KRIW.HW.W.0022.000000T0000Z-081226T0000Z/
EAST SWEETWATER COUNTY-
INCLUDING THE CITY OF...WAMSUTTER
1119 AM MST THU DEC 25 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. 

STRONG SOUTHWEST WIND OF 35 TO 45 MPH WITH GUSTS TO AROUND 60 MPH
WILL CONTINUE ACROSS EASTERN SWEETWATER COUNTY TODAY. THESE
STRONG WINDS MAY PRODUCE AREAS OF BLOWING SNOW AND LIMITED VISIBILITY
ACROSS THE AREA TODAY.

INTERSTATE 80 THROUGH EASTERN SWEETWATER COUNTY WILL BE IMPACTED
BY THESE STRONG WINDS AND LOCALIZED BLOWING SNOW. THE AREA TO BE
MOST IMPACTED WILL BE THE STRETCH OF INTERSTATE 80 BETWEEN MILE
MARKERS 130 AND 199 BETWEEN POINT OF ROCKS AND THE CARBON COUNTY
LINE. ANTICIPATE DANGEROUS CROSSWINDS IN THESE AREAS.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

000 
WWUS75 KRIW 252358
NPWRIW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
458 PM MST THU DEC 25 2008

...GUSTY SOUTH TO SOUTHWEST WIND WILL CONTINUE TO DIMINISH THIS EVENING...

.ALTHOUGH SOUTH TO SOUTHWEST WIND WILL REMAIN GUSTY THIS EVENING...
SPEEDS ARE EXPECTED TO BE BELOW HAZARDOUS LEVELS. THE SOUTHERLY
FLOW WILL GIVE WAY TO WEST WIND AND EVENTUALLY NORTH WIND BY SUNRISE.

WYZ019-260100-
/O.EXP.KRIW.HW.W.0022.000000T0000Z-081226T0000Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
INCLUDING THE CITY OF...JEFFREY CITY
458 PM MST THU DEC 25 2008

...HIGH WIND WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON...

THE HIGH WIND WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON. 

SOUTH TO SOUTHWEST WIND WILL CONTINUE TO BLOW AT 30 TO 40 MPH WITH
OCCASIONAL GUSTS AROUND 50 MPH THIS EVENING. THESE SPEEDS ARE
BELOW THE WARNING THRESHOLD...THEREFORE THE HIGH WIND WARNING WILL
BE ALLOWED TO EXPIRE.

MOTORISTS ON HIGHWAY 287 SHOULD STILL BE PREPARED FOR SUDDEN GUSTY
CROSSWINDS THROUGH THE EVENING HOURS.

$$

WYZ020-260100-
/O.EXP.KRIW.HW.W.0022.000000T0000Z-081226T0000Z/
NATRONA COUNTY LOWER ELEVATIONS-
INCLUDING THE CITY OF...CASPER
458 PM MST THU DEC 25 2008

...HIGH WIND WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON...

THE HIGH WIND WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON. 

SOUTH TO SOUTHWEST WIND WILL CONTINUE TO BLOW AT 25 TO 35 MPH WITH
OCCASIONAL GUSTS AROUND 45 MPH THIS EVENING. THESE SPEEDS ARE BELOW
THE WARNING THRESHOLD...THEREFORE THE HIGH WIND WARNING WILL BE
ALLOWED TO EXPIRE. THE PEAK WIND TODAY AT THE CASPER-NATRONA
COUNTY INTERNATIONAL AIRPORT WAS 68 MPH AT 946 AM AND 1049 AM.

MOTORISTS ON INTERSTATE 25 AND HIGHWAYS 20...26 AND 220 SHOULD
STILL BE PREPARED FOR SUDDEN GUSTY CROSSWINDS THROUGH THE EVENING
HOURS.

$$

WYZ030-260100-
/O.EXP.KRIW.HW.W.0022.000000T0000Z-081226T0000Z/
EAST SWEETWATER COUNTY-
INCLUDING THE CITY OF...WAMSUTTER
458 PM MST THU DEC 25 2008

...HIGH WIND WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON...

THE HIGH WIND WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON. 

SOUTH TO SOUTHWEST WIND WILL CONTINUE TO BLOW AT 20 TO 30 MPH WITH
OCCASIONAL GUSTS AROUND 40 MPH THIS EVENING. THESE SPEEDS ARE
BELOW THE WARNING THRESHOLD...THEREFORE THE HIGH WIND WARNING WILL
BE ALLOWED TO EXPIRE.

MOTORISTS ON INTERSTATE 80 SHOULD STILL BE PREPARED FOR SUDDEN GUSTY
CROSSWINDS THROUGH THE EVENING HOURS.

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
900 AM MST WED DEC 24 2008

.UPDATE...STRONG GRADIENT CONTINUES TO DEVELOP ACROSS CENTRAL
WYOMING.  THIS WILL LEAD TO HIGH WINDS ACROSS THE GREEN MOUNTAINS
AND NATRONA COUNTY OVERNIGHT INTO CHRISTMAS DAY.  THE WINDS WILL
LIKELY SLACKEN OVERNIGHT SOME TO SUB WARNING OVER NATRONA
COUNTY...BUT WILL KEEP IT GOING TO EASE CONFUSION.  SOUTHWEST WINDS
OF 35 TO 50 MPH WILL BE COMMON WITH FREQUENT GUSTS OVER 60 MPH.

.SHORT TERM...TODAY THROUGH FRIDAY NIGHT
LOW CLOUDS AND SOME LIGHT SNOW CURRENTLY LOCATED ACROSS PORTIONS OF
THE WESTERN BASINS THIS MORNING. OTHERWISE...GENERALLY DRY
CONDITIONS ARE CURRENTLY PRESENT...AHEAD OF THE NEXT APPROACHING
PACIFIC TROUGH. IR SATELLITE SHOWING ADDITIONAL CLOUD COVER
ASSOCIATED WITH THIS PACIFIC TROUGH IS STREAMING INTO WESTERN
IDAHO...WITH A PENDING ARRIVAL INTO WESTERN WYOMING DURING THE
MORNING HOURS TODAY. LIGHT SNOW WILL BE FOUND TODAY ACROSS THE
WEST...WITH SNOW COVERAGE INCREASING THROUGH THE AFTERNOON HOURS.
THE BRUNT OF THE SYSTEM IS ANTICIPATED TO ARRIVE WEDNESDAY EVENING
AND INTO THE OVERNIGHT HOURS. SNOWFALL RATES IN EXCESS OF AN INCH
AN HOUR WILL BE FOUND ACROSS THE WESTERN MOUNTAINS AND VALLEYS
DURING THE MORNING HOURS OF CHRISTMAS...WHICH SHOULD RESULT IN THE
MAJORITY OF SNOWFALL ASSOCIATED WITH THIS STORM...ESPECIALLY WITH
SOME INSTABILITY TO HELP BRING INTENSIFIED SNOWFALL ACROSS
PORTIONS OF THE WEST. ISENTROPIC LIFT WILL ALSO PLAY A GOOD PART
IN THE SNOWFALL OVER THE NEXT COUPLE OF DAYS. THE STRONGEST
ISENTROPIC LIFT EXPECTED DURING THE EVENING HOURS TODAY AND WILL
CONTINUE THROUGH THURSDAY MORNING. THE BRUNT OF THE SNOWFALL
SHOULD FALL BEFORE THURSDAY EVENING...AND COVERAGE AND INTENSITY
WILL WEAKEN ONCE THE INSTABILITY WEAKENS ALONG WITH THE ISENTROPIC
LIFT THURSDAY EVENING. LIGHT SNOWFALL IS EXPECTED TO CONTINUE INTO
THE OVERNIGHT HOURS AS THE TROUGH MOVES FURTHER EAST. BY THE TIME
THE TROUGH AXIS MOVES FURTHER EAST...STORM TOTALS OF 12 TO 20
INCHES WILL BE POSSIBLE ACROSS THE WESTERN MOUNTAINS...WITH SOME
AREAS OF THE WYOMING SALT RANGE EXPECTED TO SEE HIGHER AMOUNTS.
STAR VALLEY IS ANTICIPATED TO SEE ANOTHER STORM TOTAL OF 10 TO 15
INCHES...AND JACKSON VALLEY WILL SEE 7 TO 10 INCHES...INCLUDING
AROUND 8 INCHES IN THE TOWN OF JACKSON. LESSER AMOUNTS WILL BE
FOUND IN THE ABSAROKA MOUNTAINS...AND UPPER GREEN RIVER BASIN
WHERE ADVISORY AMOUNTS ARE ANTICIPATED. THE SOUTHWESTERN CORNER OF
THE ABSAROKA MOUNTAINS FAVORED TO RECEIVE NEAR WARNING AMOUNTS OF
10 TO 14 INCHES...HOWEVER THESE AMOUNTS WILL BE LOCALIZED...AND
SNOWFALL AMOUNTS OF 4 TO 7 INCHES WILL BE MORE COMMON ACROSS
TRAVELED AREAS OF THE MOUNTAINS. THE WINTER STORM WATCH REMAINS IN
EFFECT FOR THESE AREAS...WHICH ALLOWS THE UPCOMING SHIFT ONE LAST
LOOK FOR SNOW TOTALS AND LAST CHECKS ON THE DEVELOPMENT OF THE
SYSTEM AS IT MOVES FURTHER INLAND. AS OF NOW...ISSUANCE OF
WARNINGS AND ADVISORIES ARE ANTICIPATED.

ALONG WITH SNOW...STRONG WINDS ARE ANTICIPATED ACROSS THE WIND
CORRIDOR BETWEEN ROCK SPRINGS AND CASPER. THESE INCREASED WINDS
WILL DEVELOP THIS AFTERNOON...AND WILL CONTINUE OFF AND ON THROUGH
CHRISTMAS DAY. THE MAIN LULL IN THESE STRONGER WINDS WILL OCCUR
DURING THE OVERNIGHT HOURS BEFORE RETURNING DURING THE LATE
MORNING AND AFTERNOON.

AS THIS SYSTEM MOVES FURTHER EAST...THE BIG HORN BASIN...BIG HORN
MOUNTAINS...AND NORTHERN JOHNSON COUNTY SHOULD AGAIN SEE AN
INCREASED OPPORTUNITY FOR SNOWFALL. JOHNSON COUNTY AND THE MOUNTAINS
WILL ESPECIALLY SEE THIS CHANCE DURING THURSDAY NIGHT AND INTO
FRIDAY WHEN SNOWFALL WILL BE LIKELY. SNOWFALL AMOUNTS EXPECTED TO
RANGE BETWEEN 2 AND 4 INCHES IN THE LOWER ELEVATIONS...WITH 4 TO 6
INCHES FOUND OVER THE BIG HORN MOUNTAINS.

.LONG TERM...SATURDAY THROUGH WEDNESDAY
GFS AND ECMWF BOTH AGREE THAT A STRONG W TO NW FLOW WILL DOMINATE
THE MEDIUM RANGE PERIOD. THE RESULT WILL BE PERIODS OF SNOW WEST OF
THE DIVIDE AND WINDY EAST OF THE DIVIDE. RIDGE FLATTENS SATURDAY
BEHIND OUR BIG CHRISTMAS STORM ALLOWING THE FIRST GOOD SHOT OF SNOW
OUT WEST ESPECIALLY BY SATURDAY NIGHT AND CONTINUING THROUGH SUNDAY.
AFTER THAT...THE SNOW SPIGOT WILL BE HARD TO TURN OFF OUT WEST WITH
SNOW OFF AND ON...MORE ON...THROUGH THE REMAINDER OF THE PERIOD.
GENERAL LIGHT SNOW WILL PREVAIL WITH PERIODS OF MODERATE OR GREATER
SNOW WITH EVERY PASSING DISTURBANCE WHICH WILL BE HARD TO TIME THIS
FAR OUT. AREAS EAST OF THE DIVIDE SHOULD SEE PLENTY OF WIND...
ESPECIALLY THE WIND CORRIDOR AND CODY FOOTHILLS BUT EVEN THE WIND
RIVER BASIN WILL LIKELY MIX OUT IN FAVORABLE WNW TO NW MID LEVEL
FLOW. TEMPERATURES WILL THUS BE TRICKY DEPENDING ON HOW MUCH WIND
OCCURS VS THE BASIN INVERSIONS THAT WILL TRY TO STAY IN PLACE. HAVE
PUT THE LEAST AMOUNT OF WIND IN THE BIG HORN BASIN ALONG WITH THE
COOLEST TEMPS. IF THE HIGHS ERROR...IT WILL LIKELY STILL BE ON THE
COOL SIDE...ESPECIALLY IF MORE AREAS SEE THE WIND OFF AND ON. H7
TEMPS VARY QUITE A BIT AT TIMES BETWEEN THE GFS AND THE EURO BUT ARE
GENERALLY IN THE -4 TO -8C RANGE EAST OF THE DIVIDE WITH THE
EXCEPTION OF A SHORTWAVE THAT THE MODELS HAVE PASSING BY TO THE
NORTH EITHER TUESDAY...GFS...OR WEDNESDAY...ECMWF...WHEN H7 TEMPS
DROP TO BELOW -10C ACROSS THE NORTH HALF. WESTERN VALLEY TEMPS WILL
ALSO BE TRICKY AS MEX GUIDANCE IS GENERALLY IN THE SINGLE DIGITS
EVERY NIGHT EVEN WITH SNOW FALLING. HAVE SIDED WITH WARMER TEMPS
THAN GUIDANCE WITH PLENTY OF CLOUD COVER AND OFF AND ON
SNOW...SIMILAR TO WHAT HAPPENED RECENTLY WITH RELATIVELY MILD
OVERNIGHT LOWS IN JAC.

&&

.AVIATION...
A LEE SIDE SURFACE TROUGH WILL INTENSIFY ACROSS CENTRAL WYOMING
TODAY WITH SOUTHWEST WIND INCREASING TO 30-35KT WITH GUSTS NEAR 50KT
BTWN KRKS-KCPR.  ALSO EXPECT AREAS OF LLWS FM VCNTY KCOD-KLND AFTER
18Z AS SW WINDS 7K-8KFT ASL INCREASE TO 30-40KTS OVER COLD AIR
TRAPPED IN THE BASINS.

CLOUD DECKS WILL GRADUALLY THICKEN LOWER OVER AND WEST OF THE DIVIDE
THROUGH THE DAY WITH LIGHT SNOW AND MOUNTAIN OBSCURATIONS INCREASING
THROUGH THE AFTERNOON.  AFTER 00Z THURSDAY WIDESPREAD MVFR/AREAS OF
IFR CONDITIONS ARE EXPECTED IN THE WEST WITH SNOWFALL RAPIDLY
INCREASING OVERNIGHT.  THE HEAVIEST SNOWFALL AND IFR/LIFR CONDITIONS
ARE EXPECTED 06Z-18Z THURSDAY AFFECTING KJAC-KPNA-KBPI WITH POSSIBLE
CLOSURES.

&&

.FIRE WEATHER...
THE NEXT PACIFIC TROUGH WITH ASSOCIATED HEAVY SNOWFALL WILL BEGIN TO
MOVE INTO WESTERN WYOMING LATE THIS AFTERNOON AND INTO THE EVENING.
SNOWFALL COVERAGE WILL INCREASE DURING THE OVERNIGHT HOURS...AND
SNOWFALL RATES WILL INCREASE THROUGH THE MORNING HOURS. THIS SYSTEM
IS ANTICIPATED TO BRING SIGNIFICANT SNOWFALL ACROSS THE WESTERN
MOUNTAINS AND VALLEYS...SIMILAR TO THE STORM WHICH MOVED THROUGH
LAST SUNDAY THROUGH TUESDAY. THE BRUNT OF SNOWFALL ACROSS THE
WESTERN MOUNTAINS AND VALLEYS WILL OCCUR THROUGH THE LATE MORNING
HOURS OF CHRISTMAS WITH LIGHTER SNOWFALL CONTINUING INTO THE EVENING
HOURS. AHEAD OF THIS PACIFIC SYSTEM...WINDS ACROSS THE CORRIDOR
BETWEEN ROCK SPRINGS AND CASPER WILL INCREASE THIS AFTERNOON...AND
REMAIN ELEVATED THROUGH THE EVENING BEFORE EXPERIENCING A BRIEF LULL
DURING THE OVERNIGHT HOURS. STRONG WINDS WILL AGAIN DEVELOP DURING
THE AFTERNOON OF CHRISTMAS. SNOWFALL ASSOCIATED WITH THE TROUGH WILL
SPREAD EAST OF THE DIVIDE ON THURSDAY...ESPECIALLY IMPACTING THE BIG
HORN MOUNTAINS AND JOHNSON COUNTY. FOR FURTHER DETAILS REGARDING
POTENTIAL HIGHLIGHTS FOR WINTER WEATHER AND HIGH WINDS...PLEASE SEE
THE APPROPRIATE PRODUCTS...WSWRIW FOR WINTER WEATHER INFORMATION...
AND NPWRIW FOR WIND INFORMATION.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
HIGH WIND WARNING THIS AFTERNOON THROUGH THURSDAY AFTERNOON FOR
WYZ019-020.

WINTER STORM WATCH FROM THIS EVENING THROUGH LATE THURSDAY NIGHT
FOR WYZ001-002-012>015-023>027.

&&

UPDATE...TWB
SHORT TERM...BRANHAM
LONG TERM...SKRBAC
AVIATION...AEM
FIRE WEATHER...BRANHAM

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
500 AM MST WED DEC 24 2008

WYZ001>020-022>030-251200-
ABSAROKA MOUNTAINS-BIGHORN MOUNTAINS SOUTHEAST-
BIGHORN MOUNTAINS WEST-CASPER MOUNTAIN-CODY FOOTHILLS-
EAST SWEETWATER COUNTY-FLAMING GORGE-
GREEN MOUNTAINS AND RATTLESNAKE RANGE-JACKSON HOLE-LANDER FOOTHILLS-
NATRONA COUNTY LOWER ELEVATIONS-NORTH BIG HORN BASIN-
NORTHEAST JOHNSON COUNTY-OWL CREEK AND BRIDGER MOUNTAINS-
ROCK SPRINGS AND GREEN RIVER-SALT RIVER AND WYOMING RANGES-
SOUTH LINCOLN COUNTY-SOUTHEAST BIG HORN BASIN-
SOUTHEAST JOHNSON COUNTY-SOUTHWEST BIG HORN BASIN-STAR VALLEY-
TETON AND GROS VENTRE MOUNTAINS-UPPER GREEN RIVER BASIN-
UPPER GREEN RIVER BASIN FOOTHILLS-UPPER WIND RIVER BASIN-
WIND RIVER BASIN-WIND RIVER MOUNTAINS EAST-WIND RIVER MOUNTAINS WEST-
YELLOWSTONE NATIONAL PARK-
500 AM MST WED DEC 24 2008

...WINTER STORM WATCHES FOR MOST OF WESTERN WYOMING 6 PM TODAY
THROUGH CHRISTMAS NIGHT...

...HIGH WIND WATCH FOR EAST CENTRAL WYOMING INCLUDING CASPER
TODAY AND CHRISTMAS DAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.

.DAY ONE...TODAY AND TONIGHT

SNOWFALL WILL BECOME WIDESPREAD OVER WESTERN WYOMING BY THIS
AFTERNOON AND WILL INTENSIFY TONIGHT. THIS SNOWFALL WILL CAUSE
ROADWAYS...ESPECIALLY MOUNTAINS PASSES ACROSS WESTERN WYOMING TO
BECOME SNOW PACKED AND SLICK.

ADDITIONALLY...STRONG WINDS WILL BE FOUND OVER THE WIND CORRIDOR
BETWEEN ROCK SPRINGS AND CASPER. SOUTHWEST WINDS WILL POTENTIALLY
INCREASE TO 35 TO 40 MPH...WITH GUSTS IN EXCESS OF 50 MPH DURING
THE AFTERNOON HOURS AND CONTINUE INTO THE EVENING. THOSE TRAVELING
ACROSS WESTERN WYOMING...OR IN HIGH PROFILE VEHICLES ACROSS
EASTERN WYOMING WILL WANT TO CHECK CURRENT CONDITIONS AND
FORECASTS BEFORE TRAVELING TODAY.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

SNOWFALL ACROSS WESTERN WYOMING WILL CONTINUE CHRISTMAS DAY AND INTO
EARLY FRIDAY MORNING. THIS SYSTEM HAS THE POTENTIAL TO BRING
SIGNIFICANT SNOWFALL ACROSS THE WESTERN MOUNTAINS AND VALLEYS.
SNOWFALL OF 15 TO 25 INCHES IN THE MOUNTAINS IS LIKELY...WITH 2 TO 3
FEET POSSIBLE OVER THE SALT RIVER...WYOMING AND WESTERN WIND RIVER
RANGES.  THE WESTERN VALLEYS COULD RECEIVE 8 TO 15 INCHES. SOUTHWEST
TO WEST WINDS ARE EXPECTED AS WELL PRODUCING BLOWING AND DRIFTING
SNOW. SIGNIFICANT IMPACT TO TRAVEL OVER WESTERN WYOMING IS HIGHLY
LIKELY. SEE WINTER STORM WATCH PRODUCT FOR MORE INFORMATION.

STRONG SOUTHWEST WINDS ACROSS EAST CENTRAL WYOMING WILL CONTINUE
THROUGH THURSDAY AFTERNOON. HIGH WIND...SUSTAINED WIND SPEEDS OF 40
MPH OR GREATER WITH GUSTS OF 58 MPH OR GREATER...ARE POSSIBLE. SEE
THE HIGH WIND WATCH PRODUCT FOR MORE INFORMATION.

ANOTHER STORM SYSTEM WILL BRING YET ANOTHER ROUND OF SNOW TO THE FAR
WEST OVER THE WEEKEND. HOLIDAY TRAVELLERS SHOULD CHECK THE LATEST
FORECAST AND ROAD CONDITIONS BEFORE VENTURING OUT.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT SNOWFALL AMOUNTS AND WIND SPEEDS
TODAY. THANK YOU.

TEAM RIVERTON