783
WWUS45 KRIW 011854
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1254 PM MDT WED APR 1 2026
WYZ001-012-021300-
/O.CON.KRIW.WS.W.0003.260402T0500Z-260404T0000Z/
YELLOWSTONE NATIONAL PARK-TETON AND GROS VENTRE MOUNTAINS-
INCLUDING THE CITIES OF MAMMOTH, OLD FAITHFUL, AND LAKE
1254 PM MDT WED APR 1 2026
...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
6 PM MDT FRIDAY...
* WHAT...HEAVY SNOW POSSIBLE. TOTAL SNOW ACCUMULATIONS BETWEEN 12
AND 18 INCHES POSSIBLE WITH LOCALLY UP TO 24 INCHES IN THE WESTERN
SLOPES OF THE TETONS. IN NORTHERN YELLOWSTONE PARK, 6 TO 10 INCHES
OF SNOW IS POSSIBLE. WINDS COULD GUST AS HIGH AS 45 MPH.
* WHERE...TETON AND GROS VENTRE MOUNTAINS AND YELLOWSTONE NATIONAL
PARK.
* WHEN...FROM 11 PM THIS EVENING TO 6 PM MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT, INCLUDING OVER TETON AND
TOGWOTEE PASSES.
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 .
WYZ014-015-024-021300-
/O.CON.KRIW.WS.W.0003.260402T0500Z-260404T0000Z/
WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-SALT RIVER
AND WYOMING RANGES-
1254 PM MDT WED APR 1 2026
...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
6 PM MDT FRIDAY...
* WHAT...HEAVY SNOW POSSIBLE. TOTAL SNOW ACCUMULATIONS BETWEEN 10
AND 16 INCHES POSSIBLE. WINDS COULD GUST AS HIGH AS 50 MPH.
* WHERE...WIND RIVER MOUNTAINS EAST, WIND RIVER MOUNTAINS WEST, AND
SALT RIVER AND WYOMING RANGES.
* WHEN...FROM 11 PM THIS EVENING TO 6 PM MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT, INCLUDING OVER SOUTH
PASS.
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 .
WYZ008-009-021300-
/O.CON.KRIW.WS.W.0003.260403T0000Z-260404T0000Z/
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
1254 PM MDT WED APR 1 2026
...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THURSDAY TO 6 PM
MDT FRIDAY...
* WHAT...HEAVY SNOW POSSIBLE. TOTAL SNOW ACCUMULATIONS BETWEEN 12
AND 20 INCHES POSSIBLE, WITH THE HIGHEST AMOUNTS ON THE WESTERN
SLOPES OF THE NORTHERN BIGHORNS. WINDS COULD GUST AS HIGH AS 45
MPH.
* WHERE...BIGHORN MOUNTAINS SOUTHEAST AND BIGHORN MOUNTAINS WEST.
* WHEN...FROM 6 PM THURSDAY TO 6 PM MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT, INCLUDING OVER GRANITE
AND POWDER RIVER PASSES.
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 .
FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE, VISIT
HTTPS://WEATHER.GOV/RIW/ .
WITTMANN
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