Special Weather Statement
Issued by NWS Riverton, WY

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WWUS85 KRIW 200912
SPSRIW

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
201 AM MST THU NOV 20 2014

WYZ001-012-013-023>025-202300-
JACKSON HOLE-SALT RIVER AND WYOMING RANGES-STAR VALLEY-
TETON AND GROS VENTRE MOUNTAINS-UPPER GREEN RIVER BASIN FOOTHILLS-
YELLOWSTONE NATIONAL PARK-
201 AM MST THU NOV 20 2014

...SIGNIFICANT SNOW EXPECTED ACROSS THE WESTERN MOUNTAINS
BEGINNING FRIDAY NIGHT AND LASTING THROUGH SUNDAY MORNING...

MOISTURE WILL BE ON THE INCREASE FROM THE EASTERN PACIFIC STARTING
TODAY...CONTINUING THROUGH SATURDAY NIGHT. LIGHT AREAS OF SNOW WILL
BEGIN TO FALL ACROSS THE MOUNTAINS OF WESTERN WYOMING STARTING
LATER TODAY...CONTINUING OFF AND ON THROUGH THE DAY FRIDAY. THE
MOUNTAINS WILL SEE BETWEEN ONE AND THREE INCHES OF SNOWFALL WITH
THIS INITIAL SYSTEM...WITH A TRACE TO AND INCH AT LOWER ELEVATIONS.
HOWEVER...AFTER MIDNIGHT FRIDAY...A MUCH STRONGER AND MORE MOISTURE
LADEN SYSTEM WILL RUN INTO THE WESTERN MOUNTAINS WITH PERIODS OF
MODERATE TO HEAVY SNOWFALL AT TIMES...LASTING THROUGH SATURDAY
NIGHT. HEAVIEST SNOWFALL IS CURRENTLY EXPECTED BETWEEN MID DAY
AND MIDNIGHT ON SATURDAY BEFORE TAPERING OFF TO LIGHT SNOW SHOWERS
BY SUNDAY MORNING. THE MOUNTAINS WILL LIKELY SEE 8 TO 12 INCHES OF
NEW SNOWFALL WITH THIS SECOND SYSTEM THROUGH SUNDAY MORNING...WITH
THE STAR AND JACKSON VALLEYS RECEIVING BETWEEN 3 AND 6 INCHES.
ADDITIONALLY...AS WINDS OF 10 TO 25 MPH COME AROUND TO THE WEST
TO SOUTHWEST WITH THIS SYSTEM...FAVORED WINDWARD SLOPES WILL SEE
AS MUCH AS 14 INCHES OF THE WHITE STUFF OVER THE SAME PERIOD OF
TIME.

ALL TRAVELERS AND OUTDOOR ENTHUSIASTS SHOULD BE PREPARED
FOR THIS SNOW EVENT ALONG WITH THE POSSIBILITY OF DELAYED
TRAVEL...PARTICULARLY OVER THE REGION`S MOUNTAIN PASSES. PLEASE
CHECK BACK WITH THE NATIONAL WEATHER SERVICE IN RIVERTON THROUGH THE
REST OF THE WEEK FOR FUTURE FORECASTS AND STATEMENTS CONCERNING
THE THIS EVENT.

$$

WYZ002-014-015-202300-
ABSAROKA MOUNTAINS-WIND RIVER MOUNTAINS EAST-
WIND RIVER MOUNTAINS WEST-
201 AM MST THU NOV 20 2014

...SIGNIFICANT WINTER WEATHER EXPECTED ACROSS THE CENTRAL AND
NORTHERN MOUNTAINS BEGINNING FRIDAY NIGHT AND LASTING THROUGH SUNDAY
MORNING...

MOISTURE WILL BE ON THE INCREASE FROM THE EASTERN PACIFIC STARTING
TODAY...CONTINUING THROUGH SATURDAY NIGHT. LIGHT AREAS OF SNOW WILL
BEGIN TO FALL ACROSS THE HIGHER MOUNTAINS CENTRAL AND NORTHERN
WYOMING STARTING LATER TODAY...CONTINUING OFF AND ON THROUGH THE DAY
FRIDAY. THE MOUNTAINS WILL SEE FROM A HALF INCH TO TWO INCHES OF
SNOWFALL THROUGH THE DAY ON FRIDAY FROM THIS INITIAL SYSTEM.
HOWEVER...AFTER MIDNIGHT FRIDAY...A MUCH STRONGER AND MORE MOISTURE
LADEN SYSTEM WILL RUN INTO THE MOUNTAINS WITH PERIODS OF LIGHT TO
MODERATE SNOWFALL...LASTING THROUGH SATURDAY NIGHT. HEAVIEST SNOWFALL
IS CURRENTLY EXPECTED BETWEEN MID AFTERNOON AND MIDNIGHT ON SATURDAY
BEFORE TAPERING OFF TO LIGHT SNOW SHOWERS BY SUNDAY MORNING.
ADDITIONALLY...WEST TO SOUTHWEST WINDS WILL INCREASE RAPIDLY
OVERNIGHT FRIDAY AND THROUGH THE DAY ON SATURDAY...BLOWING 40 TO 50
MPH WITH GUSTS BETWEEN 60 AND 70 MPH AT TIMES. WITH THE MOUNTAINS
LIKELY TO SEE 5 TO 10 INCHES OF NEW SNOWFALL BY SUNDAY MORNING...THE
COMBINATION OF BOTH SNOW AND WIND MAY CAUSE SIGNIFICANT DRIFTING
ALONG WITH MUCH REDUCED VISIBILITIES.

ALL TRAVELERS AND OUTDOOR ENTHUSIASTS SHOULD BE PREPARED
FOR THIS SNOW AND WIND EVENT ALONG WITH THE POSSIBILITY OF DELAYED
TRAVEL...PARTICULARLY OVER THE REGION`S MOUNTAIN PASSES. PLEASE
CHECK BACK WITH THE NATIONAL WEATHER SERVICE IN RIVERTON THROUGH THE
REST OF THE WEEK FOR FUTURE FORECASTS AND STATEMENTS CONCERNING
THE THIS EVENT.

$$

WYZ026>030-202300-
EAST SWEETWATER COUNTY-FLAMING GORGE-ROCK SPRINGS AND GREEN RIVER-
SOUTH LINCOLN COUNTY-UPPER GREEN RIVER BASIN-
201 AM MST THU NOV 20 2014

...SIGNIFICANT CHANGE IN THE WEATHER EXPECTED ACROSS SOUTHWEST AND
SOUTHERN WYOMING BEGINNING SATURDAY MORNING AND LASTING THROUGH
SUNDAY MORNING...

SATURDAY...MOISTURE FROM THE EASTERN PACIFIC WILL MAKE ITS WAY INTO
THE REGION WITH PERIODS OF LIGHT TO MODERATE SNOWFALL INCREASING
THROUGH DAY...LASTING THROUGH SATURDAY NIGHT. HEAVIEST SNOWFALL IS
CURRENTLY EXPECTED BETWEEN MID AFTERNOON AND MIDNIGHT ON SATURDAY
BEFORE TAPERING OFF TO LIGHT SNOW SHOWERS BY SUNDAY MORNING.
ADDITIONALLY...WEST TO SOUTHWEST WINDS WILL INCREASE THROUGH THE
DAY ON SATURDAY...BLOWING 15 TO 25 MPH WITH GUSTS BETWEEN 25 AND
35 MPH AT TIMES. WITH THE AREA LIKELY TO SEE 1 TO 4 INCHES OF NEW
SNOWFALL BY SUNDAY MORNING...THE COMBINATION OF BOTH SNOW AND WIND
MAY CAUSE SOME MINOR DRIFTING ALONG WITH REDUCED VISIBILITIES.

ALL TRAVELERS ALONG THE I80 CORRIDOR AND OTHER OUTDOOR ENTHUSIASTS
SHOULD BE PREPARED FOR THIS WINTER WEATHER EVENT ALONG WITH THE
POSSIBILITY FOR DELAYED TRAVEL. PLEASE CHECK BACK WITH
THE NATIONAL WEATHER SERVICE IN RIVERTON THROUGH THE REST OF THE WEEK
FOR FUTURE FORECASTS AND STATEMENTS CONCERNING THE THIS EVENT.

$$

WYZ019-020-022-202300-
CASPER MOUNTAIN-GREEN MOUNTAINS AND RATTLESNAKE RANGE-
NATRONA COUNTY LOWER ELEVATIONS-
201 AM MST THU NOV 20 2014

...INCREASING STRONG WINDS WILL INTRODUCE A CHANGE IN THE WEATHER
ACROSS PORTIONS OF NORTHEASTERN SWEETWATER COUNTY...SOUTHEASTERN
FREMONT COUNTY...AND MOST OF NATRONA COUNTY BEGINNING SATURDAY
MORNING AND LASTING THROUGH SUNDAY MORNING...

SATURDAY...SOUTHWEST WINDS WILL INCREASE THROUGH THE DAY ON
SATURDAY...BLOWING 25 TO 40 MPH WITH GUSTS BETWEEN 40 AND 55 MPH AT
TIMES. WINDS ATOP THE CASPER MOUNTAIN AREA MAY GUST AS HIGH
AS 60 TO 70 MPH. ADDITIONALLY...LIGHT SNOWFALL WILL DEVELOP LATE IN
THE DAY ON SATURDAY LASTING THROUGH THE EVENING PERIOD WITH THE AREA
LIKELY TO SEE A TRACE TO A COUPLE OF INCHES OF NEW SNOWFALL BY SUNDAY
MORNING. THE COMBINATION OF SNOW AND WIND MAY CAUSE SOME
PERIODS OF REDUCED VISIBILITIES AND SLICK ROADS.

ALL TRAVELERS AND OTHER OUTDOOR ENTHUSIASTS SHOULD BE PREPARED FOR
THIS WIND AND WINTER WEATHER EVENT...WITH THE POSSIBILITY OF
DELAYED TRAVEL AT TIMES. PLEASE CHECK BACK WITH THE NATIONAL WEATHER
SERVICE IN RIVERTON THROUGH THE REST OF THE WEEK FOR FUTURE FORECASTS
AND STATEMENTS CONCERNING THE THIS EVENT.

$$

WYZ008-009-202300-
BIGHORN MOUNTAINS SOUTHEAST-BIGHORN MOUNTAINS WEST-
201 AM MST THU NOV 20 2014

...SIGNIFICANT SNOW EXPECTED ACROSS THE BIGHORN MOUNTAINS
BEGINNING SATURDAY AND LASTING THROUGH SUNDAY MORNING...

SATURDAY...MOISTURE FROM THE EASTERN PACIFIC WILL MAKE ITS WAY INTO
THE REGION WITH PERIODS OF LIGHT TO MODERATE SNOWFALL INCREASING
THROUGH DAY...LASTING THROUGH SATURDAY NIGHT. HEAVIEST SNOWFALL IS
CURRENTLY EXPECTED BETWEEN MID AFTERNOON SATURDAY AND SUNDAY MORNING
BEFORE TAPERING OFF TO LIGHT SNOW SHOWERS LATER SUNDAY MORNING.
THE AREA LIKELY TO SEE WIDESPREAD 4 TO 8 INCHES OF NEW
SNOWFALL BY SUNDAY MORNING.

ALL TRAVELERS AND OTHER OUTDOOR ENTHUSIASTS SHOULD BE PREPARED FOR
THIS WINTER WEATHER EVENT ALONG WITH THE POSSIBILITY FOR DELAYED
TRAVEL...ESPECIALLY OVER THE MOUNTAIN PASSES. PLEASE CHECK BACK WITH
THE NATIONAL WEATHER SERVICE IN RIVERTON THROUGH THE REST OF THE WEEK
FOR FUTURE FORECASTS AND STATEMENTS CONCERNING THE THIS EVENT.

$$

JB




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