091
FLUS45 KRIW 200928
HWORIW
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
228 AM MST SAT DEC 20 2025
WYZ001>020-022>030-211330-
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-CODY FOOTHILLS-
NORTH BIGHORN BASIN-SOUTHWEST BIGHORN BASIN-SOUTHEAST BIGHORN BASIN-
OWL CREEK AND BRIDGER MOUNTAINS-BIGHORN MOUNTAINS WEST-
BIGHORN MOUNTAINS SOUTHEAST-NORTHEAST JOHNSON COUNTY-
SOUTHEAST JOHNSON COUNTY-TETON AND GROS VENTRE MOUNTAINS-
JACKSON HOLE-WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-
UPPER WIND RIVER BASIN-WIND RIVER BASIN-LANDER FOOTHILLS-
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
NATRONA COUNTY LOWER ELEVATIONS-CASPER MOUNTAIN-STAR VALLEY-
SALT RIVER AND WYOMING RANGES-UPPER GREEN RIVER BASIN FOOTHILLS-
UPPER GREEN RIVER BASIN-SOUTH LINCOLN COUNTY-
ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY-
228 AM MST SAT DEC 20 2025
THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.
DAY ONE
TODAY AND TONIGHT.
WIND GUSTS OF 25 TO 45 MPH WILL RETURN ACROSS MUCH OF THE AREA THIS
AFTERNOON.
SNOW DEVELOPS OVER WESTERN PORTIONS TONIGHT. THIS WILL BE THE START
OF A MULTI-DAY EVENT THAT WILL CONTINUE THROUGH MONDAY NIGHT.
DAYS TWO THROUGH SEVEN
SUNDAY THROUGH FRIDAY.
SUNDAY THROUGH MONDAY NIGHT...PERIODS OF MODERATE TO HEAVY SNOWFALL
WILL OCCUR ACROSS THE HIGHER ELEVATIONS OF WESTERN WY. SNOW LEVELS
WILL RISE TO 7000 TO 8000 FT BY MIDDAY SUNDAY, SO ANY PRECIPITATION
WILL LIKELY FALL AS RAIN IN THE JACKSON/STAR VALLEYS. SNOWFALL
AMOUNTS OF 18 TO 36 INCHES EXPECTED DURING THIS TIME. WIND GUSTS UP
TO 30 MPH WILL OCCUR SUNDAY AFTERNOON, INCREASING TO 40 MPH SUNDAY
NIGHT. WIND GUSTS UP TO 60 MPH WILL BE POSSIBLE OVER SOUTH PASS AND
THE SOUTH SIDE OF CASPER SUNDAY AND SUNDAY NIGHT.
CHRISTMAS EVE AND CHRISTMAS DAY...EARLY INDICATIONS FOR THE
POTENTIAL OF ANOTHER ROUND OF SNOW MAINLY ACROSS WESTERN WY.
TEMPERATURES MAY BE COLD ENOUGH TO SUPPORT SNOW OVER LOWER
ELEVATIONS, BUT AT THIS TIME CONFIDENCE REMAINS LOW.
SPOTTER INFORMATION STATEMENT
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
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