012
WWUS45 KRIW 150640
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1240 AM MDT WED APR 15 2026
WYZ001-002-012-160000-
/O.UPG.KRIW.WS.A.0005.260416T0000Z-260417T1200Z/
/O.NEW.KRIW.WS.W.0004.260416T0000Z-260417T1200Z/
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-TETON AND GROS
VENTRE MOUNTAINS-
INCLUDING THE CITIES OF MAMMOTH, OLD FAITHFUL, AND LAKE
1240 AM MDT WED APR 15 2026
...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 AM MDT
FRIDAY...
* WHAT...HEAVY SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 8 AND
15 INCHES. WINDS GUSTING AS HIGH AS 50 MPH.
* WHERE...ABSAROKA MOUNTAINS, TETON AND GROS VENTRE MOUNTAINS, AND
YELLOWSTONE NATIONAL PARK.
* WHEN...FROM 6 PM THIS EVENING TO 6 AM MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT, ESPECIALLY ACROSS TETON
PASS AND TOGWOTEE PASS. STRONG WINDS WILL CAUSE LIMITED VISIBILITY.
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 .
WYZ014-015-160000-
/O.UPG.KRIW.WS.A.0005.260416T0000Z-260418T0000Z/
/O.NEW.KRIW.WS.W.0004.260416T0000Z-260418T0000Z/
WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-
1240 AM MDT WED APR 15 2026
...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 PM MDT
FRIDAY...
* WHAT...HEAVY SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 9 AND
18 INCHES. WINDS GUSTING AS HIGH AS 60 MPH.
* WHERE...WIND RIVER MOUNTAINS.
* WHEN...FROM 6 PM THIS EVENING TO 6 PM MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT, ESPECIALLY ACROSS SOUTH
PASS. STRONG WINDS WILL CAUSE LIMITED VISIBILITY.
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/ .
STRAUB
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