234
WWUS45 KRIW 221922
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
122 PM MDT WED APR 22 2026
WYZ001-231400-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-260424T0500Z/
YELLOWSTONE NATIONAL PARK-
INCLUDING THE CITIES OF LAKE, OLD FAITHFUL, AND MAMMOTH
122 PM MDT WED APR 22 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT
THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 4 AND 10
INCHES, WITH LESSER ACCUMULATIONS OF 1 TO 4 INCHES NEARBY MAMMOTH
AND THE WESTERN ENTRANCE OF YNP. ACCUMULATIONS OF 6 TO 12 INCHES
ARE EXPECTED ACROSS THE HIGHER ELEVATIONS WITH UP TO 18 INCHES AT
PITCHSTONE PLATEAU IN SOUTHWEST YELLOWSTONE. WINDS GUSTING BETWEEN
30 AND 45 MPH.
* WHERE...YELLOWSTONE NATIONAL PARK.
* WHEN...UNTIL 11 PM MDT THURSDAY.
* 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 CURRENT ROAD CONDITIONS ACROSS YELLOWSTONE NATIONAL PARK, VISIT
HTTPS://NPS.GOV/YELLOWSTONE.
WYZ002-231400-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-260424T0500Z/
ABSAROKA MOUNTAINS-
122 PM MDT WED APR 22 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT
THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 6 AND 12
INCHES FOR ELEVATIONS 9,000 FEET AND ABOVE. WINDS GUSTING BETWEEN
50 AND 70 MPH, ESPECIALLY ACROSS THE EASTERN PORTIONS OF THE
ABSAROKA MOUNTAINS.
* WHERE...ABSAROKA MOUNTAINS.
* WHEN...UNTIL 11 PM MDT THURSDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT, ESPECIALLY IN THE
BACKCOUNTRY.
* ADDITIONAL DETAILS...TOTAL SNOW ACCUMULATIONS OF 1 TO 4 INCHES
ALONG US 14/60/20 WEST OF CODY AND AMOUNTS OF 4 TO 8 INCHES ACROSS
CHIEF JOSEPH PASS.
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 .
WYZ012-231400-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-260424T0500Z/
TETON AND GROS VENTRE MOUNTAINS-
122 PM MDT WED APR 22 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT
THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 6 AND 12
INCHES FOR ELEVATIONS ABOVE 7,500 FEET. TOTAL ACCUMULATIONS AROUND
20 INCHES ARE POSSIBLE FOR THE HIGHEST ELEVATIONS OF THE TETON
MOUNTAINS. WINDS GUSTING BETWEEN 30 AND 40 MPH, WITH GUSTS AROUND
50 MPH ACROSS THE HIGHEST ELEVATIONS.
* WHERE...TETON AND GROS VENTRE MOUNTAINS.
* WHEN...UNTIL 11 PM MDT THURSDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT, INCLUDING OVER TETON
PASS AND TOGWOTEE PASS.
* ADDITIONAL DETAILS...TOTAL SNOW ACCUMULATIONS OF 1 TO 5 INCHES ARE
POSSIBLE FOR ELEVATIONS BELOW 7,500 FEET.
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.
WYZ024-231400-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-260424T0500Z/
SALT RIVER AND WYOMING RANGES-
122 PM MDT WED APR 22 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT
THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS OF 5 TO 10 INCHES,
WITH THE HIGHEST PEAKS SEEING ACCUMULATIONS AROUND 15 INCHES.
WINDS GUSTING BETWEEN 35 AND 50 MPH.
* WHERE...SALT RIVER AND WYOMING RANGES.
* WHEN...UNTIL 11 PM MDT THURSDAY.
* IMPACTS...TRAVEL COULD BE DIFFICULT, INCLUDING OVER SALT RIVER
PASS.
* ADDITIONAL DETAILS...TOTAL SNOW ACCUMULATIONS OF 1 TO 3 INCHES
ACROSS SALT RIVER PASS.
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/ .
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