718
WWUS45 KRIW 250831
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
131 AM MST WED FEB 25 2026
WYZ013-250945-
/O.CAN.KRIW.WW.Y.0009.000000T0000Z-260226T0000Z/
JACKSON HOLE-
INCLUDING THE CITIES OF JACKSON
131 AM MST WED FEB 25 2026
..WINTER WEATHER ADVISORY IS CANCELLED
PRECIPITATION IS FORECAST TO FALL LARGELY AS RAIN ACROSS JACKSON
HOLE VALLEY. OCCASIONAL PERIODS OF A RAIN/SNOW MIX IS POSSIBLE WITH
MINIMAL ACCUMULATIONS. GUSTY 25 TO 35 MPH WEST WINDS ARE EXPECTED
THROUGHOUT THE DAY.
WYZ001-260000-
/O.CON.KRIW.WS.W.0002.000000T0000Z-260226T0000Z/
YELLOWSTONE NATIONAL PARK-
INCLUDING THE CITIES OF OLD FAITHFUL, LAKE, AND MAMMOTH
131 AM MST WED FEB 25 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
* WHAT...HEAVY SNOW. ADDITIONAL SNOW ACCUMULATIONS OF 5 TO 10 INCHES
OVER THE PITCHSTONE PLATEAU, WITH ISOLATED AMOUNTS UP TO 12
INCHES. AN ADDITIONAL 2 TO 5 INCHES ACROSS CENTRAL PORTIONS OF
YELLOWSTONE AND UP TO 1 INCH IN LAMAR VALLEY AND MAMMOTH. GUSTY
WEST WINDS OF 20 TO 35 MPH.
* WHERE...YELLOWSTONE NATIONAL PARK.
* WHEN...UNTIL 5 PM MST THIS AFTERNOON.
* IMPACTS...BACKCOUNTRY TRAVEL WILL BE VERY DIFFICULT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN
YOUR VEHICLE IN CASE OF AN EMERGENCY.
FOR GRAPHICAL DEPICTIONS OF THE SNOWFALL FORECAST, INCLUDING THE
OFFICIAL NWS FORECAST, HIGH END AMOUNTS, AND LOW END AMOUNTS, VISIT
HTTPS://WEATHER.GOV/RIW/WINTER.
FOR WINTER ROAD CONDITIONS FROM THE WYOMING DEPARTMENT OF
TRANSPORTATION, VISIT HTTPS://WYOROAD.INFO.
WYZ002-260000-
/O.CON.KRIW.WS.W.0002.000000T0000Z-260226T0000Z/
ABSAROKA MOUNTAINS-
131 AM MST WED FEB 25 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
* WHAT...HEAVY SNOW POSSIBLE. ADDITIONAL SNOW ACCUMULATIONS 6 TO 10
INCHES OVER THE WESTERN HALF OF THE ABSAROKAS AND 2 TO 6 INCHES
OVER THE EASTERN HALF. WEST WINDS OF 35 TO 45 MPH, WITH GUSTS OF
55 TO 70 MPH.
* WHERE...ABSAROKA MOUNTAINS.
* WHEN...UNTIL 5 PM MST THIS AFTERNOON.
* IMPACTS...TRAVEL WILL BE VERY DIFFICULT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN
YOUR VEHICLE IN CASE OF AN EMERGENCY.
FOR GRAPHICAL DEPICTIONS OF THE SNOWFALL FORECAST, INCLUDING THE
OFFICIAL NWS FORECAST, HIGH END AMOUNTS, AND LOW END AMOUNTS, VISIT
HTTPS://WEATHER.GOV/RIW/WINTER .
FOR WINTER ROAD CONDITIONS FROM THE WYOMING DEPARTMENT OF
TRANSPORTATION, VISIT HTTPS://WYOROAD.INFO .
WYZ012-024-260000-
/O.CON.KRIW.WS.W.0002.000000T0000Z-260226T0000Z/
TETON AND GROS VENTRE MOUNTAINS-SALT RIVER AND WYOMING RANGES-
131 AM MST WED FEB 25 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
* WHAT...HEAVY SNOW. ADDITIONAL SNOW ACCUMULATIONS OF 6 TO 12
INCHES, WITH ISOLATED HIGHER AMOUNTS UP TO 15 INCHES. WEST WINDS
WITH FREQUENT GUSTS OF 40 TO 50 MPH.
* WHERE...TETON AND GROS VENTRE MOUNTAINS AND SALT RIVER AND WYOMING
RANGES.
* WHEN...UNTIL 5 PM MST THIS AFTERNOON.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE WEDNESDAY MORNING COMMUTE, ESPECIALLY OVER TETON
AND TOGWOTEE PASSES.
* ADDITIONAL DETAILS...SNOWFALL RATES WILL GENERALLY BE BETWEEN 0.5
AND 1 INCHES PER HOUR.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN
YOUR VEHICLE IN CASE OF AN EMERGENCY.
FOR GRAPHICAL DEPICTIONS OF THE SNOWFALL FORECAST, INCLUDING THE
OFFICIAL NWS FORECAST, HIGH END AMOUNTS, AND LOW END AMOUNTS, VISIT
HTTPS://WEATHER.GOV/RIW/WINTER .
FOR WINTER ROAD CONDITIONS FROM THE WYOMING DEPARTMENT OF
TRANSPORTATION, VISIT HTTPS://WYOROAD.INFO .
WYZ014-260000-
/O.CON.KRIW.WS.W.0002.000000T0000Z-260226T0000Z/
WIND RIVER MOUNTAINS WEST-
131 AM MST WED FEB 25 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
* WHAT...HEAVY SNOW EXPECTED. ADDITIONAL SNOW ACCUMULATIONS OF 9 TO
15 INCHES FOR ELEVATIONS ABOVE 9,500 FEET AGL. 2 TO 4 INCHES
POSSIBLE OVER SOUTH PASS. GUSTY WEST WINDS AROUND 60 MPH WILL BE
COMMON, INCLUDING OVER SOUTH PASS.
* WHERE...WIND RIVER MOUNTAINS WEST.
* WHEN...UNTIL 5 PM MST THIS AFTERNOON.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT OVER SOUTH PASS. THE
HAZARDOUS CONDITIONS COULD IMPACT THE WEDNESDAY MORNING COMMUTE.
* ADDITIONAL DETAILS...FOR SOUTH PASS, THE MOST LIKELY PERIOD OF
HEAVY SNOW WILL OCCUR BEFORE 11AM MST.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN
YOUR VEHICLE IN CASE OF AN EMERGENCY.
FOR GRAPHICAL DEPICTIONS OF THE SNOWFALL FORECAST, INCLUDING THE
OFFICIAL NWS FORECAST, HIGH END AMOUNTS, AND LOW END AMOUNTS, VISIT
HTTPS://WEATHER.GOV/RIW/WINTER .
FOR WINTER ROAD CONDITIONS FROM THE WYOMING DEPARTMENT OF
TRANSPORTATION, VISIT HTTPS://WYOROAD.INFO .
WYZ008-009-260000-
/O.CON.KRIW.WW.Y.0009.000000T0000Z-260226T0000Z/
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
131 AM MST WED FEB 25 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
* WHAT...SNOW EXPECTED. ADDITIONAL SNOW ACCUMULATIONS OF 4 TO 6
INCHES FROM POWDER RIVER PASS AND NORTH. THE HIGHEST ELEVATIONS
COULD HAVE AN ADDITIONAL 9 INCHES. GUSTY WEST TO NORTHWEST WINDS
UP TO 60 MPH THROUGH THE AFTERNOON.
* WHERE...BIGHORN MOUNTAINS SOUTHEAST AND BIGHORN MOUNTAINS WEST.
* WHEN...UNTIL 5 PM MST THIS AFTERNOON.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING.
FOR GRAPHICAL DEPICTIONS OF THE SNOWFALL FORECAST, INCLUDING THE
OFFICIAL NWS FORECAST, HIGH END AMOUNTS, AND LOW END AMOUNTS, VISIT
HTTPS://WEATHER.GOV/RIW/WINTER .
FOR WINTER ROAD CONDITIONS FROM THE WYOMING DEPARTMENT OF
TRANSPORTATION, VISIT HTTPS://WYOROAD.INFO .
FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE, VISIT
HTTPS://WEATHER.GOV/RIW/ .
GERHARDT
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