015
WWUS45 KRIW 230812
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
112 AM MST MON FEB 23 2026
WYZ001-232315-
/O.UPG.KRIW.WS.A.0001.260224T1200Z-260225T1800Z/
/O.NEW.KRIW.WS.W.0002.260224T1200Z-260226T0000Z/
YELLOWSTONE NATIONAL PARK-
INCLUDING THE CITIES OF MAMMOTH, LAKE, AND OLD FAITHFUL
112 AM MST MON FEB 23 2026
...WINTER STORM WARNING IN EFFECT FROM 5 AM TUESDAY TO 5 PM MST
WEDNESDAY...
* WHAT...HEAVY SNOW. TOTAL SNOW ACCUMULATIONS 12 TO 20 INCHES OVER
THE PITCHSTONE PLATEAU OF SOUTHWEST YELLOWSTONE NATIONAL PARK.
LOCALLY HIGHER AMOUNTS OVER 2 FEET WILL BE POSSIBLE. 6 TO 12
INCHES IN CENTRAL PORTIONS OF YELLOWSTONE, AND BETWEEN 1 AND 4
INCHES IN LAMAR VALLEY AND MAMMOTH. WEST WIND 15 TO 30 MPH.
* WHERE...YELLOWSTONE NATIONAL PARK.
* WHEN...FROM 5 AM TUESDAY TO 5 PM MST WEDNESDAY.
* IMPACTS...BACKCOUNTRY TRAVEL COULD 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 .
WYZ002-232315-
/O.UPG.KRIW.WS.A.0001.260224T1200Z-260225T1800Z/
/O.NEW.KRIW.WS.W.0002.260224T1200Z-260226T0000Z/
ABSAROKA MOUNTAINS-
112 AM MST MON FEB 23 2026
...WINTER STORM WARNING IN EFFECT FROM 5 AM TUESDAY TO 5 PM MST
WEDNESDAY...
* WHAT...HEAVY SNOW POSSIBLE. TOTAL SNOW ACCUMULATIONS 15 TO 25
INCHES OVER THE WESTERN HALF OF THE ABSAROKA RANGE, WITH 4 TO 10
INCHES OVER THE EASTERN HALF. WEST WIND FREQUENTLY GUSTING 35 TO
45 MPH. WEST WINDS GUSTING 60 TO 70 MPH WILL OCCUR WEDNESDAY, WITH
THE STRONGER GUSTS OCCURRING ON THE EAST SIDE OF THE RANGE.
* WHERE...ABSAROKA MOUNTAINS.
* WHEN...FROM 5 AM TUESDAY TO 5 PM MST WEDNESDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT.
* ADDITIONAL DETAILS...A HIGH WIND WARNING IS ALSO IN EFFECT FOR THE
ABSAROKA MOUNTAINS THROUGH TUESDAY MORNING DUE TO STRONGER WIND
SPEEDS EXPECTED IN AREAS WHERE SNOWFALL WILL BE NOT AS HEAVY.
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 .
WYZ012-024-232315-
/O.UPG.KRIW.WS.A.0001.260224T1200Z-260225T1800Z/
/O.NEW.KRIW.WS.W.0002.260224T1200Z-260226T0000Z/
TETON AND GROS VENTRE MOUNTAINS-SALT RIVER AND WYOMING RANGES-
112 AM MST MON FEB 23 2026
...WINTER STORM WARNING IN EFFECT FROM 5 AM TUESDAY TO 5 PM MST
WEDNESDAY...
* WHAT...HEAVY SNOW. TOTAL SNOW ACCUMULATIONS 16 TO 24 INCHES.
LOCALLY HIGHER AMOUNTS UP TO 3 FEET POSSIBLE IN THE TETONS. WEST
WIND FREQUENTLY GUSTING 25 TO 35 MPH TUESDAY, INCREASING TO 35 TO
45 MPH WEDNESDAY.
* WHERE...TETON AND GROS VENTRE MOUNTAINS AND SALT RIVER AND WYOMING
RANGES.
* WHEN...FROM 5 AM TUESDAY TO 5 PM MST WEDNESDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE TUESDAY EVENING AND WEDNESDAY MORNING COMMUTES.
* ADDITIONAL DETAILS...SNOWFALL TOTALS TOWARD THE SOUTHERN HALF OF
THE SALT RIVER RANGE WILL RANGE FROM 4 TO 10 INCHES.
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 .
WYZ014-232315-
/O.NEW.KRIW.WS.W.0002.260224T1200Z-260226T0000Z/
WIND RIVER MOUNTAINS WEST-
112 AM MST MON FEB 23 2026
...WINTER STORM WARNING IN EFFECT FROM 5 AM TUESDAY TO 5 PM MST
WEDNESDAY...
* WHAT...HEAVY SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 12
AND 18 INCHES OVER THE NORTHERN HALF OF THE RANGE. 1 TO 2 INCHES
POSSIBLE OVER SOUTH PASS TUESDAY NIGHT INTO WEDNESDAY MORNING.
WINDS GUSTING AS HIGH AS 50 MPH OVER SOUTH PASS TUESDAY,
INCREASING TO 60 MPH ON WEDNESDAY.
* WHERE...WIND RIVER MOUNTAINS WEST.
* WHEN...FROM 5 AM TUESDAY TO 5 PM MST WEDNESDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT OVER SOUTH PASS. THE
HAZARDOUS CONDITIONS COULD IMPACT THE TUESDAY EVENING AND
WEDNESDAY MORNING COMMUTES.
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 .
WYZ013-232315-
/O.NEW.KRIW.WW.Y.0009.260224T1200Z-260226T0000Z/
JACKSON HOLE-
INCLUDING THE CITIES OF JACKSON
112 AM MST MON FEB 23 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM TUESDAY TO 5 PM MST
WEDNESDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 3 AND 8
INCHES. WINDS GUSTING AS HIGH AS 45 MPH.
* WHERE...JACKSON HOLE.
* WHEN...FROM 5 AM TUESDAY TO 5 PM MST WEDNESDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE TUESDAY MORNING AND EVENING COMMUTES.
* ADDITIONAL DETAILS...PRECIPITATION WILL BEGIN AS SNOW TUESDAY
MORNING, BUT IS EXPECTED TO CHANGE OVER TO RAIN BY THE AFTERNOON
AND LAST THROUGH MUCH OF THE NIGHT TUESDAY NIGHT. RAIN WILL THEN
CHANGE BACK OVER TO SNOW WEDNESDAY MORNING. IF PRECIPITATION RATES
ARE HIGHER, SNOWFALL TOTALS WILL BE HIGHER.
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/ .
TL
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