649
WWUS45 KRIW 122033
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
233 PM MDT THU MAR 12 2026
WYZ001-130600-
/O.CON.KRIW.WW.Y.0012.000000T0000Z-260313T0600Z/
YELLOWSTONE NATIONAL PARK-
INCLUDING THE CITIES OF LAKE, OLD FAITHFUL, AND MAMMOTH
233 PM MDT THU MAR 12 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS OF UP TO TWO INCHES,
MAINLY ABOVE 9000 FT. WINDS GUSTING AS HIGH AS 60 MPH.
* WHERE...YELLOWSTONE NATIONAL PARK.
* WHEN...UNTIL MIDNIGHT MDT TONIGHT.
* IMPACTS...A COMBINATION OF FALLING SNOW AND STRONG WINDS WILL MAKE
TRAVEL DIFFICULT, ESPECIALLY IN THE BACKCOUNTRY.
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 .
WYZ012-130600-
/O.CON.KRIW.WW.Y.0012.000000T0000Z-260313T0600Z/
TETON AND GROS VENTRE MOUNTAINS-
233 PM MDT THU MAR 12 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS OF 2 TO 4 INCHES,
MAINLY ABOVE 9000 FT. WINDS GUSTING AS HIGH AS 55 MPH.
* WHERE...TETON AND GROS VENTRE MOUNTAINS.
* WHEN...UNTIL MIDNIGHT MDT TONIGHT.
* IMPACTS...TRAVEL COULD BE DIFFICULT. THE WINTRY CONDITIONS WILL
IMPACT THE EVENING COMMUTES OVER TETON AND TOGWOTEE PASSES.
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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