Winter Storm Warning 9, NWS Riverton, WY

000 
WWUS45 KRIW 192305 AAA
WSWRIW

URGENT - WINTER WEATHER MESSAGE...UPDATED
NATIONAL WEATHER SERVICE RIVERTON WY
405 PM MST WED DEC 19 2007

...SIGNIFICANT SNOWFALL IS EXPECTED FOR WESTERN WYOMING TONIGHT
AND THURSDAY...

.A STRONG AND COLD PACIFIC STORM SYSTEM WILL BRING SIGNIFICANT
SNOW ACCUMULATIONS TO MOST OF WESTERN WYOMING TONIGHT THROUGH
THURSDAY EVENING.

WYZ016-200015-
/O.CAN.KRIW.SN.Y.0036.071220T0600Z-071221T0600Z/
UPPER WIND RIVER BASIN-
INCLUDING THE CITY OF...DUBOIS
405 PM MST WED DEC 19 2007

...SNOW ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE SNOW
ADVISORY. 

A SNOW ADVISORY WAS INADVERTENTLY ISSUED FOR THIS ZONE. ALTHOUGH 1
TO 3 INCHES OF SNOW IS EXPECTED IN THE UPPER WIND RIVER BASIN
TONIGHT INTO THURSDAY...ADVISORY LEVEL AMOUNTS ARE NOT EXPECTED.

$$

WYZ012-013-023-024-201100-
/O.CON.KRIW.WS.W.0009.071220T0600Z-071221T0600Z/
TETON AND GROS VENTRE MOUNTAINS-JACKSON HOLE-STAR VALLEY-
SALT RIVER AND WYOMING RANGES-
INCLUDING THE CITIES OF...JACKSON...AFTON...ALPINE...THAYNE
405 PM MST WED DEC 19 2007

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

A WINTER STORM WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 11 PM MST THURSDAY. 

SNOWFALL IS EXPECTED TO INCREASE THIS EVENING AND WILL CONTINUE
THROUGH TONIGHT WITH SNOWFALL BECOMING HEAVY AT TIMES. THE SNOW
WILL CONTINUE THROUGH THURSDAY EVENING. 12 TO 16 INCHES OF SNOW
IS EXPECTED TO ACCUMULATE IN THE TETONS INCLUDING THE SUMMIT OF
THE JACKSON HOLE SKI RESORT ALONG WITH UP TO 12 INCHES EXPECTED
ACROSS THE GROS VENTRE RANGE. UP TO 18 INCHES IS POSSIBLE ALONG
WEST FACING SLOPES IN THE HIGHEST ELEVATIONS OF THE TETONS. IN
ADDITION...SOUTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS TO 35 MPH
WILL CREATE BLOWING AND DRIFTING SNOW. TETON PASS WILL BECOME
SNOW COVERED AND SLICK.

TOTAL ACCUMULATIONS OF 6 TO 8 INCHES IS EXPECTED IN THE NORTHERN
PORTION OF THE JACKSON VALLEY INCLUDING MOOSE AND MORAN JUNCTION
BY THURSDAY EVENING. 4 INCHES OF SNOWFALL IS EXPECTED ACROSS THE
SOUTHERN PORTION OF THE JACKSON VALLEY INCLUDING THE TOWN OF
JACKSON BY THURSDAY EVENING. SOUTHWEST WINDS OF 10 TO 20 MPH WILL
CREATE LOCAL BLOWING AND DRIFTING SNOW.

6 TO 8 INCHES OF SNOW IS EXPECTED ACCUMULATE IN THE NORTHERN
PORTION OF THE STAR VALLEY INCLUDING ALPINE JUNCTION BY THURSDAY
EVENING. 4 INCHES OF SNOWFALL IS EXPECTED ACROSS THE SOUTHERN
PORTION OF THE STAR VALLEY INCLUDING THE TOWN OF AFTON BY
THURSDAY EVENING.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ001-002-014-015-025-027-201100-
/O.CON.KRIW.SN.Y.0036.071220T0600Z-071221T0600Z/
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-
WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-
UPPER GREEN RIVER BASIN FOOTHILLS-SOUTH LINCOLN COUNTY-
INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL...
PINEDALE...KEMMERER...COKEVILLE
405 PM MST WED DEC 19 2007

...SNOW ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
11 PM MST THURSDAY...

A SNOW ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
11 PM MST THURSDAY. 

SNOWFALL IS EXPECTED TO INCREASE THIS EVENING AND WILL CONTINUE
THROUGH TONIGHT WITH SNOWFALL POSSIBLY BECOMING HEAVY AT TIMES.
PERIODS OF SNOW AREA EXPECTED TO CONTINUE THROUGH THURSDAY
EVENING. TOTAL SNOW ACCUMULATIONS IN YELLOWSTONE NATIONAL PARK...
THE ABSAROKA AND WIND RIVER MOUNTAINS OF 6 TO 12 INCHES ARE
EXPECTED BY THURSDAY EVENING. SOUTHWEST WINDS OF 15 TO 25 MPH
WILL CREATE LOCAL BLOWING AND DRIFTING SNOW.

TOTAL SNOW ACCUMULATIONS IN THE UPPER GREEN RIVER BASIN FOOTHILLS
INCLUDING PINEDALE AND IN SOUTHERN LINCOLN COUNTY INCLUDING THE
TOWN OF KEMMERER OF 3 TO 6 INCHES IS EXPECTED. LOCALLY UP TO
8 INCHES IS POSSIBLE IN THE HIGHER ELEVATIONS ALONG AND NEAR
HIGHWAY 189/191 NEAR BONDURANT.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

000 
WWUS45 KRIW 201120
WSWRIW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
420 AM MST THU DEC 20 2007

...SIGNIFICANT SNOWFALL IS EXPECTED FOR WESTERN WYOMING TODAY
THROUGH THIS EVENING...

.A STRONG AND COLD PACIFIC STORM SYSTEM WILL BRING SIGNIFICANT
SNOW ACCUMULATIONS TO MOST OF WESTERN WYOMING TODAY THROUGH THIS
EVENING.

WYZ014-201930-
/O.UPG.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
/O.EXA.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
WIND RIVER MOUNTAINS WEST-
420 AM MST THU DEC 20 2007

...WINTER STORM WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER
STORM WARNING...WHICH IS IN EFFECT UNTIL 11 PM MST THIS EVENING.
THE SNOW ADVISORY IS NO LONGER IN EFFECT. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF 12 TO
16 INCHES ARE EXPECTED ACROSS THE WEST SLOPE OF THE WIND RIVER
MOUNTAINS INCLUDING THE WHITE PINE SKI RESORT. SOUTHWEST WINDS OF
15 TO 25 MPH WILL CREATE LOCAL BLOWING AND DRIFTING SNOW.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ012-201930-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
TETON AND GROS VENTRE MOUNTAINS-
420 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF
12 TO 16 INCHES ARE EXPECTED ACROSS THE GROS VENTRE RANGE AND
ALONG THE TETONS INCLUDING THE TOP OF THE JACKSON HOLE SKI RESORT. LOCAL
SNOWFALL AMOUNTS OF UP TO 16 TO 18 INCHES EXPECTED ON THE WEST AND
SOUTHWEST FACING SLOPES OF THE TETON MOUNTAINS. TETON PASS WILL BE
SLICK AND SNOW COVERED TODAY. EXPECT CONSIDERABLE BLOWING AND
DRIFTING SNOW TODAY WHERE SOUTHWEST WINDS OF 15 TO 25 MPH WILL BE
COMMON. THE MOUNTAIN PEAKS WILL EXPERIENCE WIND GUSTS OF OVER 50
MPH THIS MORNING.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ024-201930-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
SALT RIVER AND WYOMING RANGES-
420 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF
12 TO 16 INCHES ARE EXPECTED ACROSS THE WYOMING AND SALT RIVER
RANGES. SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE LOCAL BLOWING
AND DRIFTING SNOW. THE MOUNTAIN PEAKS WILL EXPERIENCE WIND GUSTS
OF OVER 50 MPH THIS MORNING. SALT RIVER PASS WILL BE SLICK AND
SNOW COVERED TODAY.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ013-201930-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
JACKSON HOLE-
INCLUDING THE CITY OF...JACKSON
420 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF
UP TO 8 INCHES ARE EXPECTED ACROSS THE NORTHERN PORTION OF THE
JACKSON VALLEY INCLUDING MOOSE AND MORAN JUNCTION. UP TO 4 INCHES
OF SNOWFALL ARE EXPECTED ACROSS THE SOUTHERN PORTION OF THE
JACKSON VALLEY INCLUDING THE TOWN OF JACKSON. SOUTHWEST WINDS OF
15 TO 25 MPH WILL CREATE LOCAL BLOWING AND DRIFTING SNOW.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ023-201930-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
STAR VALLEY-
INCLUDING THE CITIES OF...AFTON...ALPINE...THAYNE
420 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF
UP TO 8 INCHES ARE EXPECTED ACROSS THE NORTHERN PORTION OF THE
VALLEY INCLUDING ALPINE JUNCTION. UP TO 4 INCHES OF SNOWFALL ARE EXPECTED
ACROSS THE SOUTHERN PORTION OF THE STAR VALLEY INCLUDING THE TOWN
OF AFTON. SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE LOCAL
BLOWING AND DRIFTING SNOW.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ001-002-201930-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-
INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL
420 AM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF
UP TO 6 TO 12 INCHES ARE EXPECTED ACROSS THE SOUTHWEST ABSAROKA
MOUNTAINS AS WELL AS ACROSS THE SOUTHERN PORTION OF YELLOWSTONE
PARK AND THE HIGHER ELEVATIONS OF YELLOWSTONE PARK. ELSEWHERE...3
TO 6 INCHES OF SNOWFALL ARE EXPECTED ACROSS THE REST OF THE PARK
INCLUDING MAMMOTH AS WELL AS ACROSS THE NORTHERN AND EASTERN
PORTIONS OF THE ABSAROKA MOUNTAINS INCLUDING THE CHIEF JOSEPH
HIGHWAY. SOUTHWEST WINDS OF 15 TO 25 MPH ALONG WITH GUSTS OF 40 TO
50 MPH ACROSS THE ABSAROKA MOUNTAINS WILL CREATE LOCAL BLOWING AND
DRIFTING SNOW.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ015-201930-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
WIND RIVER MOUNTAINS EAST-
420 AM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF
6 TO 12 INCHES ARE EXPECTED ACROSS EAST SLOPE OF THE WIND RIVER
MOUNTAINS INCLUDING TOGWOTEE PASS. 3 TO 6 INCHES OF SNOW ARE
EXPECTED ACROSS SOUTH PASS ALONG WITH CONSIDERABLE BLOWING AND
DRIFTING SNOW. SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE LOCAL
BLOWING AND DRIFTING SNOW EXCEPT SOUTH PASS WILL HAVE 35 TO 50MPH
WINDS CREATING MORE OF A THREAT OF BLOWING AND DRIFTING SNOW
THERE.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ025-201930-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
UPPER GREEN RIVER BASIN FOOTHILLS-
INCLUDING THE CITY OF...PINEDALE
420 AM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF
3 TO 4 INCHES ARE EXPECTED ACROSS BIG PINEY...4 TO 5 INCHES AT PINEDALE
AND DANIEL WITH UP TO 6 INCHES EXPECTED AROUND BONDURANT. HIGHWAYS
189 AND 191 ARE EXPECTED TO BECOME SNOW COVERED AND SLICK.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ027-201930-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
SOUTH LINCOLN COUNTY-
INCLUDING THE CITIES OF...KEMMERER...COKEVILLE
420 AM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF
3 TO 6 INCHES ARE EXPECTED ACROSS SOUTHERN LINCOLN COUNTY
INCLUDING COKEVILLE AND KEMMERER. HIGHWAYS 30 AND 189 WILL BE
SLICK AND SNOW COVERED TODAY.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

LIPSON

000 
WWUS45 KRIW 201539
WSWRIW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
839 AM MST THU DEC 20 2007

...SIGNIFICANT SNOWFALL IS EXPECTED FOR WESTERN WYOMING TODAY
THROUGH THIS EVENING...

.A STRONG AND COLD PACIFIC STORM SYSTEM WILL BRING SIGNIFICANT
SNOW ACCUMULATIONS TO MOST OF WESTERN WYOMING TODAY THROUGH THIS
EVENING.

WYZ012-202300-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
TETON AND GROS VENTRE MOUNTAINS-
839 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

A BRIEF RESPITE IN SNOW WILL OCCUR THIS MORNING AND EARLY
AFTERNOON. ANOTHER PERIOD OF SNOW...HEAVY AT TIMES...WILL MOVE IN
BETWEEN 1 PM AND 3 PM THIS AFTERNOON...CONTINUING THROUGH THIS
EVENING. SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT
TIMES. 

TOTAL SNOW ACCUMULATIONS OF 12 TO 16 INCHES ARE EXPECTED
ACROSS THE GROS VENTRE RANGE AND ALONG THE TETONS INCLUDING THE
TOP OF THE JACKSON HOLE SKI RESORT. LOCAL SNOWFALL AMOUNTS OF UP
TO 16 TO 18 INCHES EXPECTED ON THE WEST AND SOUTHWEST FACING
SLOPES OF THE TETON MOUNTAINS. TETON PASS WILL BE SLICK AND SNOW
COVERED TODAY. EXPECT CONSIDERABLE BLOWING AND DRIFTING SNOW TODAY
WHERE SOUTHWEST WINDS OF 15 TO 25 MPH WILL BE COMMON. THE MOUNTAIN
PEAKS WILL EXPERIENCE WIND GUSTS OF OVER 50 MPH THIS MORNING.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ024-202300-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
SALT RIVER AND WYOMING RANGES-
839 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF 12 TO
16 INCHES ARE EXPECTED ACROSS THE WYOMING AND SALT RIVER RANGES.
SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE LOCAL BLOWING AND
DRIFTING SNOW. THE MOUNTAIN PEAKS WILL EXPERIENCE WIND GUSTS OF
OVER 50 MPH THIS MORNING. SALT RIVER PASS WILL BE SLICK AND SNOW
COVERED TODAY.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ014-202300-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
WIND RIVER MOUNTAINS WEST-
839 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW WILL BEGIN TO TAPER LATE THIS MORNING WITH A BRIEF RESPITE IN
SNOWFALL THIS AFTERNOON. ANOTHER PERIOD OF SNOW...HEAVY AT
TIMES...WILL MOVE IN BY LATE AFTERNOON...CONTINUING THROUGH THIS
EVENING. SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT
TIMES.

TOTAL SNOW ACCUMULATIONS OF 12 TO 16 INCHES ARE EXPECTED
ACROSS THE WEST SLOPE OF THE WIND RIVER MOUNTAINS INCLUDING THE
WHITE PINE SKI RESORT. SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE
LOCAL BLOWING AND DRIFTING SNOW.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ013-202300-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
JACKSON HOLE-
INCLUDING THE CITY OF...JACKSON
839 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

A BRIEF RESPITE IN SNOW WILL OCCUR THIS MORNING AND EARLY AFTERNOON.
ANOTHER PERIOD OF SNOW...HEAVY AT TIMES...WILL MOVE IN BETWEEN 1
PM AND 3 PM THIS AFTERNOON...CONTINUING THROUGH THIS EVENING.
SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT TIMES.

TOTAL SNOW ACCUMULATIONS OF UP TO 8 INCHES ARE EXPECTED
ACROSS THE NORTHERN PORTION OF THE JACKSON VALLEY INCLUDING MOOSE
AND MORAN JUNCTION. UP TO 4 INCHES OF SNOWFALL ARE EXPECTED ACROSS
THE SOUTHERN PORTION OF THE JACKSON VALLEY INCLUDING THE TOWN OF
JACKSON. SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE LOCAL BLOWING
AND DRIFTING SNOW.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ023-202300-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
STAR VALLEY-
INCLUDING THE CITIES OF...AFTON...ALPINE...THAYNE
839 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF UP TO
8 INCHES ARE EXPECTED ACROSS THE NORTHERN PORTION OF THE VALLEY
INCLUDING ALPINE JUNCTION. UP TO 4 INCHES OF SNOWFALL ARE
EXPECTED ACROSS THE SOUTHERN PORTION OF THE STAR VALLEY INCLUDING
THE TOWN OF AFTON. SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE
LOCAL BLOWING AND DRIFTING SNOW.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ001-002-202300-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-
INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL
839 AM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

A BRIEF RESPITE IN SNOW WILL OCCUR THIS MORNING AND EARLY AFTERNOON.
ANOTHER PERIOD OF SNOW...HEAVY AT TIMES...WILL MOVE IN BETWEEN 1
PM AND 3 PM THIS AFTERNOON...CONTINUING THROUGH THIS EVENING.
SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT TIMES.

TOTAL SNOW ACCUMULATIONS OF UP TO 6 TO 12 INCHES ARE EXPECTED
ACROSS THE SOUTHWEST ABSAROKA MOUNTAINS AS WELL AS ACROSS THE
SOUTHERN PORTION OF YELLOWSTONE PARK AND THE HIGHER ELEVATIONS OF
YELLOWSTONE PARK. ELSEWHERE... 3 TO 6 INCHES OF SNOWFALL ARE
EXPECTED ACROSS THE REST OF THE PARK INCLUDING MAMMOTH AS WELL AS
ACROSS THE NORTHERN AND EASTERN PORTIONS OF THE ABSAROKA MOUNTAINS
INCLUDING THE CHIEF JOSEPH HIGHWAY. SOUTHWEST WINDS OF 15 TO 25
MPH ALONG WITH GUSTS OF 40 TO 50 MPH ACROSS THE ABSAROKA MOUNTAINS
WILL CREATE LOCAL BLOWING AND DRIFTING SNOW.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ015-202300-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
WIND RIVER MOUNTAINS EAST-
839 AM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW WILL BEGIN TO TAPER LATE THIS MORNING WITH A BRIEF RESPITE IN
SNOWFALL THIS AFTERNOON. ANOTHER PERIOD OF SNOW...HEAVY AT
TIMES...WILL MOVE IN BY LATE AFTERNOON...CONTINUING THROUGH THIS
EVENING. SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT
TIMES.  SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT TIMES.

TOTAL SNOW ACCUMULATIONS OF 6 TO 12 INCHES ARE EXPECTED ACROSS
EAST SLOPE OF THE WIND RIVER MOUNTAINS WITH HIGHER AMOUNTS OVER
TOGWOTEE PASS. 3 TO 6 INCHES OF SNOW ARE EXPECTED ACROSS SOUTH
PASS ALONG WITH CONSIDERABLE BLOWING AND DRIFTING SNOW. SOUTHWEST
WINDS OF 15 TO 25 MPH WILL CREATE LOCAL BLOWING AND DRIFTING SNOW
EXCEPT SOUTH PASS WILL HAVE 35 TO 50 MPH WINDS CREATING MORE OF A
THREAT OF BLOWING AND DRIFTING SNOW THERE.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ025-202300-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
UPPER GREEN RIVER BASIN FOOTHILLS-
INCLUDING THE CITY OF...PINEDALE
839 AM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW WILL CONTINUE TO TAPER LATE THIS MORNING WITH A BRIEF RESPITE
IN SNOWFALL THIS AFTERNOON. ANOTHER PERIOD OF SNOW...HEAVY AT
TIMES...WILL MOVE IN BY LATE AFTERNOON...CONTINUING THROUGH THIS
EVENING. SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT
TIMES. SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT TIMES.
TOTAL SNOW ACCUMULATIONS OF 3 TO 4 INCHES ARE EXPECTED ACROSS BIG
PINEY...4 TO 5 INCHES AT PINEDALE AND DANIEL WITH UP TO 6 INCHES
EXPECTED AROUND BONDURANT. HIGHWAYS 189 AND 191 ARE EXPECTED TO
BECOME SNOW COVERED AND SLICK.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ027-202300-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
SOUTH LINCOLN COUNTY-
INCLUDING THE CITIES OF...KEMMERER...COKEVILLE
839 AM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF 3 TO
6 INCHES ARE EXPECTED ACROSS SOUTHERN LINCOLN COUNTY INCLUDING
COKEVILLE AND KEMMERER. HIGHWAYS 30 AND 189 WILL BE SLICK AND
SNOW COVERED TODAY.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

000 
WWUS45 KRIW 201849
WSWRIW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1149 AM MST THU DEC 20 2007

...SIGNIFICANT SNOWFALL IS EXPECTED FOR WESTERN WYOMING TODAY
THROUGH THIS EVENING...

.A STRONG AND COLD PACIFIC STORM SYSTEM WILL BRING SIGNIFICANT
SNOW ACCUMULATIONS TO MOST OF WESTERN WYOMING TODAY THROUGH THIS
EVENING.

WYZ012-202300-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
TETON AND GROS VENTRE MOUNTAINS-
1149 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES...WILL CONTINUE TO MOVE INTO THE AREA LATE
THIS MORNING AND EARLY AFTERNOON...AND CONTINUE THROUGH THIS
EVENING. SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT
TIMES.

TOTAL SNOW ACCUMULATIONS OF 12 TO 16 INCHES ARE EXPECTED ACROSS
THE GROS VENTRE RANGE AND ALONG THE TETONS INCLUDING THE TOP OF
THE JACKSON HOLE SKI RESORT. LOCAL SNOWFALL AMOUNTS OF UP TO
16 TO 18 INCHES EXPECTED ON THE WEST AND SOUTHWEST FACING SLOPES
OF THE TETON MOUNTAINS. TETON PASS WILL BE SLICK AND SNOW COVERED
TODAY. EXPECT CONSIDERABLE BLOWING AND DRIFTING SNOW TODAY WHERE
SOUTHWEST WINDS OF 15 TO 25 MPH WILL BE COMMON. THE MOUNTAIN
PEAKS WILL EXPERIENCE WIND GUSTS OF OVER 50 MPH THIS MORNING.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ024-202300-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
SALT RIVER AND WYOMING RANGES-
1149 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF 12 TO
16 INCHES ARE EXPECTED ACROSS THE WYOMING AND SALT RIVER RANGES.
SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE LOCAL BLOWING AND
DRIFTING SNOW. THE MOUNTAIN PEAKS WILL EXPERIENCE WIND GUSTS OF
OVER 50 MPH THIS MORNING. SALT RIVER PASS WILL BE SLICK AND SNOW
COVERED TODAY.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ014-202300-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
WIND RIVER MOUNTAINS WEST-
1149 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES...WILL CONTINUE TO MOVE BACK INTO THE AREA
LATE THIS MORNING AND EARLY AFTERNOON...CONTINUING THROUGH THIS
EVENING. SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT
TIMES.

TOTAL SNOW ACCUMULATIONS OF 12 TO 16 INCHES ARE EXPECTED ACROSS
THE WEST SLOPE OF THE WIND RIVER MOUNTAINS INCLUDING THE WHITE
PINE SKI RESORT. SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE
LOCAL BLOWING AND DRIFTING SNOW.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ013-202300-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
JACKSON HOLE-
INCLUDING THE CITY OF...JACKSON
1149 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES.

TOTAL SNOW ACCUMULATIONS OF UP TO 8 INCHES ARE EXPECTED ACROSS
THE NORTHERN PORTION OF THE JACKSON VALLEY INCLUDING MOOSE AND
MORAN JUNCTION. UP TO 4 INCHES OF SNOWFALL ARE EXPECTED ACROSS
THE SOUTHERN PORTION OF THE JACKSON VALLEY INCLUDING THE TOWN OF
JACKSON. SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE LOCAL
BLOWING AND DRIFTING SNOW.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ023-202300-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
STAR VALLEY-
INCLUDING THE CITIES OF...AFTON...ALPINE...THAYNE
1149 AM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF UP TO
8 INCHES ARE EXPECTED ACROSS THE NORTHERN PORTION OF THE VALLEY
INCLUDING ALPINE JUNCTION. UP TO 4 INCHES OF SNOWFALL ARE
EXPECTED ACROSS THE SOUTHERN PORTION OF THE STAR VALLEY INCLUDING
THE TOWN OF AFTON. SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE
LOCAL BLOWING AND DRIFTING SNOW.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ001-002-202300-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-
INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL
1149 AM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING.  SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES.

TOTAL SNOW ACCUMULATIONS OF UP TO 6 TO 12 INCHES ARE EXPECTED
ACROSS THE SOUTHWEST ABSAROKA MOUNTAINS AS WELL AS ACROSS THE
SOUTHERN PORTION OF YELLOWSTONE PARK AND THE HIGHER ELEVATIONS OF
YELLOWSTONE PARK. ELSEWHERE... 3 TO 6 INCHES OF SNOWFALL ARE
EXPECTED ACROSS THE REST OF THE PARK INCLUDING MAMMOTH AS WELL AS
ACROSS THE NORTHERN AND EASTERN PORTIONS OF THE ABSAROKA
MOUNTAINS INCLUDING THE CHIEF JOSEPH HIGHWAY. SOUTHWEST WINDS OF
15 TO 25 MPH ALONG WITH GUSTS OF 40 TO 50 MPH ACROSS THE ABSAROKA
MOUNTAINS WILL CREATE LOCAL BLOWING AND DRIFTING SNOW.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ015-202300-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
WIND RIVER MOUNTAINS EAST-
1149 AM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES.

TOTAL SNOW ACCUMULATIONS OF 6 TO 12 INCHES ARE EXPECTED ACROSS
EAST SLOPE OF THE WIND RIVER MOUNTAINS WITH HIGHER AMOUNTS OVER
TOGWOTEE PASS. 3 TO 6 INCHES OF SNOW ARE EXPECTED ACROSS SOUTH
PASS ALONG WITH CONSIDERABLE BLOWING AND DRIFTING SNOW. SOUTHWEST
WINDS OF 15 TO 25 MPH WILL CREATE LOCAL BLOWING AND DRIFTING SNOW
EXCEPT SOUTH PASS WILL HAVE 35 TO 50 MPH WINDS CREATING MORE OF A
THREAT OF BLOWING AND DRIFTING SNOW THERE.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ025-202300-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
UPPER GREEN RIVER BASIN FOOTHILLS-
INCLUDING THE CITY OF...PINEDALE
1149 AM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW WILL MOVE BACK INTO THE AREA EARLY THIS AFTERNOON...CONTINUING
THROUGH THIS EVENING. SNOWFALL RATES OF ONE INCH PER HOUR ARE
EXPECTED AT TIMES.

TOTAL SNOW ACCUMULATIONS OF 3 TO 4 INCHES ARE EXPECTED ACROSS BIG
PINEY...4 TO 5 INCHES AT PINEDALE AND DANIEL WITH UP TO 6 INCHES
EXPECTED AROUND BONDURANT. HIGHWAYS 189 AND 191 ARE EXPECTED TO
BECOME SNOW COVERED AND SLICK.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ027-202300-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
SOUTH LINCOLN COUNTY-
INCLUDING THE CITIES OF...KEMMERER...COKEVILLE
1149 AM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THE DAY
TODAY AND WILL CONTINUE THIS EVENING. SNOWFALL RATES OF ONE INCH
PER HOUR ARE EXPECTED AT TIMES. TOTAL SNOW ACCUMULATIONS OF 3 TO
6 INCHES ARE EXPECTED ACROSS SOUTHERN LINCOLN COUNTY INCLUDING
COKEVILLE AND KEMMERER. HIGHWAYS 30 AND 189 WILL BE SLICK AND
SNOW COVERED TODAY.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

000 
WWUS45 KRIW 202211
WSWRIW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
311 PM MST THU DEC 20 2007

...SIGNIFICANT SNOWFALL IS EXPECTED FOR WESTERN WYOMING THROUGH
THIS EVENING...

.A STRONG AND COLD PACIFIC STORM SYSTEM WILL BRING SIGNIFICANT
SNOW ACCUMULATIONS TO MOST OF WESTERN WYOMING TODAY THROUGH THIS
EVENING.

WYZ012-210600-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
TETON AND GROS VENTRE MOUNTAINS-
311 PM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES...WILL CONTINUE THROUGH THIS EVENING.
SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT TIMES.

TOTAL SNOW ACCUMULATIONS OF 12 TO 16 INCHES ARE EXPECTED ACROSS
THE GROS VENTRE RANGE AND ALONG THE TETONS INCLUDING THE TOP OF
THE JACKSON HOLE SKI RESORT. LOCAL SNOWFALL AMOUNTS OF UP TO
16 TO 18 INCHES EXPECTED ON THE WEST AND SOUTHWEST FACING SLOPES
OF THE TETON MOUNTAINS. TETON PASS WILL BE SLICK AND SNOW COVERED
TODAY. EXPECT CONSIDERABLE BLOWING AND DRIFTING SNOW TODAY WHERE
SOUTHWEST WINDS OF 15 TO 25 MPH WILL BE COMMON. THE MOUNTAIN
PEAKS WILL EXPERIENCE WIND GUSTS OF OVER 50 MPH THIS MORNING.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ024-210600-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
SALT RIVER AND WYOMING RANGES-
311 PM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THIS
EVENING. SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT
TIMES. TOTAL SNOW ACCUMULATIONS OF 12 TO 16 INCHES ARE EXPECTED
ACROSS THE WYOMING AND SALT RIVER RANGES. SOUTHWEST WINDS OF 15 TO
25 MPH WILL CREATE LOCAL BLOWING AND DRIFTING SNOW. THE MOUNTAIN
PEAKS WILL EXPERIENCE WIND GUSTS OF OVER 50 MPH THIS MORNING. SALT
RIVER PASS WILL BE SLICK AND SNOW COVERED TODAY.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ014-210600-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
WIND RIVER MOUNTAINS WEST-
311 PM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES...WILL CONTINUE THROUGH THIS EVENING.
SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT TIMES.

TOTAL SNOW ACCUMULATIONS OF 12 TO 16 INCHES ARE EXPECTED ACROSS
THE WEST SLOPE OF THE WIND RIVER MOUNTAINS INCLUDING THE WHITE
PINE SKI RESORT. SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE
LOCAL BLOWING AND DRIFTING SNOW.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ013-210600-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
JACKSON HOLE-
INCLUDING THE CITY OF...JACKSON
311 PM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THIS
EVENING. SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT
TIMES.

TOTAL SNOW ACCUMULATIONS OF UP TO 8 INCHES ARE EXPECTED ACROSS
THE NORTHERN PORTION OF THE JACKSON VALLEY INCLUDING MOOSE AND
MORAN JUNCTION. UP TO 4 INCHES OF SNOWFALL ARE EXPECTED ACROSS
THE SOUTHERN PORTION OF THE JACKSON VALLEY INCLUDING THE TOWN OF
JACKSON. SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE LOCAL
BLOWING AND DRIFTING SNOW.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ023-210600-
/O.CON.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
STAR VALLEY-
INCLUDING THE CITIES OF...AFTON...ALPINE...THAYNE
311 PM MST THU DEC 20 2007

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THIS
EVENING. SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT
TIMES. TOTAL SNOW ACCUMULATIONS OF UP TO 8 INCHES ARE EXPECTED
ACROSS THE NORTHERN PORTION OF THE VALLEY INCLUDING ALPINE
JUNCTION. UP TO 4 INCHES OF SNOWFALL ARE EXPECTED ACROSS THE
SOUTHERN PORTION OF THE STAR VALLEY INCLUDING THE TOWN OF AFTON.
SOUTHWEST WINDS OF 15 TO 25 MPH WILL CREATE LOCAL BLOWING AND
DRIFTING SNOW.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ001-002-210600-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-
INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL
311 PM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THIS
EVENING. SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT
TIMES.

TOTAL SNOW ACCUMULATIONS OF UP TO 6 TO 12 INCHES ARE EXPECTED
ACROSS THE SOUTHWEST ABSAROKA MOUNTAINS AS WELL AS ACROSS THE
SOUTHERN PORTION OF YELLOWSTONE PARK AND THE HIGHER ELEVATIONS OF
YELLOWSTONE PARK. ELSEWHERE... 3 TO 6 INCHES OF SNOWFALL ARE
EXPECTED ACROSS THE REST OF THE PARK INCLUDING MAMMOTH AS WELL AS
ACROSS THE NORTHERN AND EASTERN PORTIONS OF THE ABSAROKA
MOUNTAINS INCLUDING THE CHIEF JOSEPH HIGHWAY. SOUTHWEST WINDS OF
15 TO 25 MPH ALONG WITH GUSTS OF 40 TO 50 MPH ACROSS THE ABSAROKA
MOUNTAINS WILL CREATE LOCAL BLOWING AND DRIFTING SNOW.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ015-210600-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
WIND RIVER MOUNTAINS EAST-
311 PM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THIS
EVENING. SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT
TIMES.

TOTAL SNOW ACCUMULATIONS OF 6 TO 12 INCHES ARE EXPECTED ACROSS
EAST SLOPE OF THE WIND RIVER MOUNTAINS WITH HIGHER AMOUNTS OVER
TOGWOTEE PASS. 3 TO 6 INCHES OF SNOW ARE EXPECTED ACROSS SOUTH
PASS ALONG WITH CONSIDERABLE BLOWING AND DRIFTING SNOW. SOUTHWEST
WINDS OF 15 TO 25 MPH WILL CREATE LOCAL BLOWING AND DRIFTING SNOW
EXCEPT SOUTH PASS WILL HAVE 35 TO 50 MPH WINDS CREATING MORE OF A
THREAT OF BLOWING AND DRIFTING SNOW THERE.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ025-210600-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
UPPER GREEN RIVER BASIN FOOTHILLS-
INCLUDING THE CITY OF...PINEDALE
311 PM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW...HEAVY AT TIMES...WILL CONTINUE THROUGH THIS EVENING.
SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT TIMES.

TOTAL SNOW ACCUMULATIONS OF 3 TO 4 INCHES ARE EXPECTED ACROSS BIG
PINEY...4 TO 5 INCHES AT PINEDALE AND DANIEL WITH UP TO 6 INCHES
EXPECTED AROUND BONDURANT. HIGHWAYS 189 AND 191 ARE EXPECTED TO
BECOME SNOW COVERED AND SLICK.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ027-210600-
/O.CON.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
SOUTH LINCOLN COUNTY-
INCLUDING THE CITIES OF...KEMMERER...COKEVILLE
311 PM MST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING. 

SNOW...HEAVY AT TIMES IS EXPECTED TO CONTINUE THROUGH THIS
EVENING. SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED AT
TIMES. TOTAL SNOW ACCUMULATIONS OF 3 TO 6 INCHES ARE EXPECTED
ACROSS SOUTHERN LINCOLN COUNTY INCLUDING COKEVILLE AND KEMMERER.
HIGHWAYS 30 AND 189 WILL BE SLICK AND SNOW COVERED TODAY.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

000 
WWUS45 KRIW 210550
WSWRIW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1050 PM MST THU DEC 20 2007

...SNOWFALL WILL BE DECREASING OVERNIGHT...

.THE AREA OF HEAVIER SNOW WILL BE MOVING SOUTHEAST OF THE AREA
OVERNIGHT RESULTING IN DECREASING SNOWFALL FOR THE REST OF THE
NIGHT.

WYZ012>014-023-024-210700-
/O.CAN.KRIW.WS.W.0009.000000T0000Z-071221T0600Z/
TETON AND GROS VENTRE MOUNTAINS-JACKSON HOLE-
WIND RIVER MOUNTAINS WEST-STAR VALLEY-
SALT RIVER AND WYOMING RANGES-
INCLUDING THE CITIES OF...JACKSON...AFTON...ALPINE...THAYNE
1050 PM MST THU DEC 20 2007

...WINTER STORM WARNING IS CANCELLED...

THE WINTER STORM WARNING FOR WESTERN WYOMING HAS EXPIRED.

THE SNOWFALL WILL CONTINUE TO DECREASE OVERNIGHT. THUS THE WINTER
STORM WARNING FOR WESTERN WYOMING HAS EXPIRED.

$$

WYZ001-002-015-025-027-210700-
/O.CAN.KRIW.SN.Y.0036.000000T0000Z-071221T0600Z/
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-
WIND RIVER MOUNTAINS EAST-UPPER GREEN RIVER BASIN FOOTHILLS-
SOUTH LINCOLN COUNTY-
INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL...
PINEDALE...KEMMERER...COKEVILLE
1050 PM MST THU DEC 20 2007

...SNOW ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELED THE SNOW
ADVISORY. 

THE SNOWFALL WILL CONTINUE TO DECREASE OVERNIGHT. THUS THE SNOW
ADVISORY FOR WESTERN WYOMING HAS EXPIRED.

$$

LIPSON

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
327 AM MST WED DEC 19 2007

.SHORT TERM...TODAY THROUGH FRIDAY NIGHT
THE SNOW ADVISORY FOR THE ONGOING SNOW EVENT IN WESTERN WYOMING
WILL BE CANCELED AS ONLY LIGHT SNOW IS OCCURRING THERE AT THE
MOMENT WITH THE GREATEST ACCUMULATION SO FAR AT RPK WHERE ONLY 2
INCHES OF SNOWFALL HAS BEEN REPORTED. IT APPEARS THAT THE SIERRAS
MAY HAVE BLOCKED A LOT OF THE ANTICIPATED MOISTURE. OUR ATTENTION
NOW SHIFTS TO THE NEXT UPSTREAM TROUGH WHICH IS NOW LOCATED OFF
THE COAST AT 129W. THE LEAD SHORTWAVE ASSOCIATED WITH THIS TROUGH
WILL AFFECT WESTERN WY WED NT AND THU. A SWATH OF ISENTROPIC LIFT
WILL PROVIDE THE POTENTIAL FOR ONE INCH OF SNOW AN HOUR WED NT FOR
THE WEST. SNOW SHOULD CONTINUE THU AS LFQ JET DYNAMICS FROM THE
110 KNOT JET MAX COME INTO PLAY WITH AT LEAST ONE INCH OF SNOW
EVERY 3 HOURS EXPECTED DURING THE DAY IN THE WEST THURSDAY.
INSTABILITY WITH NEGATIVE LIFTED INDICES AND 100 CAPES WILL
INITIATE EMBEDDED HEAVIER SNOW SHOWERS THU WITH THE ASSOCIATED
PACIFIC COLD FRONT IN WESTERN WY. NAM QPF SPITS OUT 1.57 INCHES
FOR PORTIONS OF WESTERN WY DURING THIS TIME FRAME. WILL GO AHEAD
AND HOIST A WINTER STORM WATCH VALID FROM 00Z THURSDAY THROUGH 00Z
FRIDAY FOR UP TO 16 INCHES OF SNOWFALL IN MOUNTAIN ZONES 12 AND
24. EXPECT 4 TO 8 INCHES OF SNOW IN THE STAR AND JACKSON VALLEYS.
OPTIMAL TEMPS FOR MAXIMUM DENDRITIC GROWTH OCCURS DURING THIS TIME
FRAME AS WELL. THEN AS THE ACTUAL TROUGH APPROACHES WY...THE
ENERGY WILL SPLIT WITH MAINLY SWEETWATER AND NATRONA COUNTIES
RECEIVING THE GREATEST POPS AND SNOW AMOUNTS MAINLY ON FRIDAY
MORNING WHERE ANOTHER SWATH OF ISENTROPIC LIFT WILL BE. LIGHT SNOW
WILL BE AROUND IN NW WY FRIDAY NIGHT WITH THE UPPER NW DIFFLUENT
FLOW ON THE BACK SIDE OF THE TROUGH. A WEAK MOUNTAIN WAVE SHOULD
INCREASE WIND SPEEDS IN CODY WED NT WITH 25 TO 40 MPH WESTERLY
WINDS EXPECTED. INCREASED SW WINDS FROM WAMSUTTER TO CPR IS
EXPECTED ON THURSDAY AS THURSDAYS SHORTWAVE APPROACHES. NAM MOS
GUIDANCE IS ADVERTISING 30 KNOT WINDS FOR CPR WHICH APPEARS TO BE
THE THRESHHOLD FOR SOME HIGH WIND EVENTS. WITH A SFC PRESSURE
GRADIENT OF 9MB FROM RKS TO GCC ONLY INCREASED WINDS TO 30 TO 40
MPH FOR NOW IN THAT AREA. WITH WEAK WARM AIR ADVECTION TAKING
PLACE SATURDAY MORNING TO ENHANCE INVERSIONS AND WITH LIGHT
ACCUMULATIONS EXPECTED IN THE WIND RIVER AND UPPER GREEN RIVER
BASINS FRIDAY...THIS SHOULD BE ENOUGH TO INITIATE SOME PATCHY FOG FOR
THESE BASINS LATE FRIDAY NIGHT. EXPECT HIGH TEMPS ABOVE FREEZING
EAST OF THE DIVIDE TODAY AND THURSDAY IN AREAS THAT REMAIN WELL
MIXED WITH H7 TEMPS OF -5 BUT WILL NOT REALIZE FULL WARMING
POTENTIAL WITH SNOW COVER IN PLACE MANY AREAS. H7 TEMPS WILL COOL
THU NT AND DROP TO -18C. INVERSIONS WILL HOLD STRONG IN THE
CENTRAL BASINS TODAY.

.LONG TERM...SATURDAY THROUGH WEDNESDAY
BACKING FLOW AND WEAK ISENTROPIC UPGLIDE RETURN TO THE FAR WEST
SATURDAY AS UPPER RIDGE ESTABLISHES BRIEF PRESENCE OVER NORTHERN
ROCKIES BEFORE BEING FLATTENED BY NEXT INCOMING TROUGH. EC AND OPS
GFS ALONG WITH ITS ENSEMBLES BEGAN TO SHOW INCREASING SPREAD AS
EARLY AS SATURDAY NIGHT WITH VARIOUS OUT OF PHASE SOLUTIONS BY
MONDAY. FORECAST WEIGHTED TOWARD A CONTINUATION OF SPLIT FLOW
REGIME WITH NEXT SERIES OF PACIFIC TROUGHS AS DEPICTED BY THE EC
RATHER THAN A STRONGER NORTHERN STREAM WITH MORE CONSOLIDATED
ENERGY PLOWING ACROSS NORTHERN ROCKIES BEFORE SPLITTING DOWNSTREAM
IN THE PLAINS AS DEPICTED BY THE GFS. FIRST SHORTWAVE IN THIS NEXT
SERIES WILL DIVE ACROSS MONTANA INTO THE HIGH PLAINS SUNDAY
BRINGING INCREASING CHANCES OF SNOWFALL TO THE WEST IN NORTHWEST
FLOW WHILE KEEPING CENTRAL AREAS WELL-MIXED WITH FRONTAL PASSAGE
AND VIGOROUS NW FLOW. AFTERWARDS...EC PATTERN LOOKS VERY SIMILAR
TO PATTERN OF LAST SEVERAL DAYS WITH NEXT SYSTEM SPLITTING ALONG
THE COAST MONDAY AFTERNOON WITH NORTHERN BRANCH OF SYSTEM BRUSHING
AREA CHRISTMAS DAY. THE THIRD SYSTEM IN THIS SERIES EXPECTED TO
FORM SW LOW NEAR LAS THURSDAY. AFTER SUNDAY...A RELATIVELY MILD
AIRMASS TO DOMINATE WITH H7 TEMPS BETWEEN -4C AND -8C. BASIN AND
VALLEY INVERSIONS SHOULD BE MUCH LESS PRONOUNCED THROUGH NEXT
WEEK AFTER GOOD MIXING SCENARIO SUNDAY QUICKLY FOLLOWED BY THIS
MILDER AIRMASS. MAINLY THE FAR WEST WILL CONTINUE TO SEE CHANCES
OF SNOW THROUGH THE PERIOD WITH LIGHT ACCUMULATIONS.

&&

.AVIATION...
SNOW IS EXPECTED TO DECREASE OVER AREAS WEST OF THE CONTINENTAL
DIVIDE THIS MORNING WITH IFR CONDITIONS IMPROVING TO VFR CONDITIONS
BY NOON WITH ONLY LOCALIZED MVFR CONDITIONS IN AREAS OF LIGHT SNOW.
HOWEVER...ANOTHER MORE POTENT SYSTEM WILL MOVE IN WEDNESDAY NIGHT
WITH WIDESPREAD SNOW AND IFR CONDITIONS PREVAILING WEDNESDAY NIGHT
AND THURSDAY. EAST OF THE DIVIDE...BETWEEN KRKS AND KCPR...STRONG
SOUTHWEST WINDS WILL CONTINUE THROUGH THURSDAY AS WELL. STRONG
SOUTHWEST WINDS MAY ALSO DEVELOP ALONG THE CODY FOOTHILLS WEDNESDAY
NIGHT. SHALLOW BUT STRONG TEMPERATURE INVERSIONS OVER THE CENTRAL
BASINS REMAIN IN PLACE THROUGH THURSDAY.

&&

.FIRE WEATHER...
A SIGNIFICANT SNOWSTORM IS EXPECTED WEDNESDAY NIGHT INTO THURSDAY
OVER WESTERN WYOMING WITH UP TO 16 INCHES OF SNOWFALL EXPECTED
OVER PORTIONS OF THE TETONS AS WELL AS OVER THE GROS VENTRE...WYOMING
RANGE AND SALT RIVER RANGES. 4 TO 8 INCHES OF SNOWFALL IS EXPECTED
ACROSS THE JACKSON AND STAR VALLEYS. INVERSIONS WILL LINGER IN THE
CENTRAL BASINS TODAY. MORE MIXING IS EXPECTED THURSDAY. WEST
WINDS WILL INCREASE TO SPEEDS OF 25 TO 40 MPH ACROSS THE MOUNTAINS
AS WELL AS OVER THE CODY FOOTHILLS WEDNESDAY NIGHT. SOUTHWEST
WINDS WILL INCREASE TO SPEEDS OF 25 TO 40 MPH FROM WAMSUTTER TO
CASPER ON THURSDAY.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
SNOW ADVISORY UNTIL 5 AM MST EARLY THIS MORNING FOR WYZ012-013-
023-024.

&&

SHORT TERM...LIPSON
LONG TERM...AEM
AVIATION...SKRBAC
FIRE WEATHER...LIPSON

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
500 AM MST WED DEC 19 2007

WYZ001>020-022>030-201200-
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 19 2007

...A WINTER STORM WATCH IS IN EFFECT FOR WESTERN WYOMING FOR
TONIGHT AND THURSDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.

.DAY ONE...TODAY AND TONIGHT
THERE IS THE POTENTIAL FOR A SIGNIFICANT SNOWSTORM TO OCCUR ACROSS
WESTERN WYOMING TONIGHT AS A POTENT PACIFIC STORM SYSTEM APPROACHES
THE AREA. SNOWFALL RATES OF ONE INCH PER HOUR ARE POSSIBLE TONIGHT
ALONG WITH THE POTENTIAL FOR UP TO A FOOT OF SNOW OVER THE TETONS
WELL AS ACROSS THE WYOMING AND SALT RIVER RANGES TONIGHT. 6 INCHES
OF SNOW COULD FALL ACROSS THE GROS VENTRE RANGE TONIGHT. 6 INCHES OF
SNOWFALL MAY OCCUR TONIGHT ACROSS THE NORTHERN JACKSON AND STAR
VALLEYS ALONG WITH 3 INCHES OF SNOWFALL ACROSS THE SOUTHERN PORTION
OF THESE VALLEYS. TOGWOTEE...TETON AND SALT RIVER PASSES ARE
EXPECTED TO BECOME SNOW COVERED AND SLICK TONIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
SNOWFALL IS EXPECTED TO CONTINUE ACROSS WESTERN WYOMING THURSDAY
ALONG WITH THE POTENTIAL SNOW TOTAL OF UP TO 16 INCHES ACROSS
THE TETONS AS WELL AS OVER THE WYOMING AND SALT RIVER RANGES BY LATE
AFTERNOON. THERE IS THE POTENTIAL FOR UP TO 9 INCHES OF SNOWFALL OVER
THE GROS VENTRE RANGE. A TOTAL OF 8 INCHES OF SNOW COULD FALL ACROSS
THE NORTHERN JACKSON AND STAR VALLEYS ALONG WITH THE POTENTIAL FOR UP
TO 4 INCHES OF SNOWFALL ACROSS THE SOUTHERN PORTION OF THE JACKSON
AND STAR VALLEYS.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT ANY SNOWFALL AMOUNTS TO THE
NATIONAL WEATHER SERVICE THROUGH THE EVENING AND ON WEDNESDAY
MORNING.

TEAM RIVERTON