584
WWUS45 KRIW 120737
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
137 AM MDT THU MAR 12 2026
WYZ001-130000-
/O.CON.KRIW.WW.Y.0012.000000T0000Z-260313T0600Z/
YELLOWSTONE NATIONAL PARK-
INCLUDING THE CITIES OF LAKE, OLD FAITHFUL, AND MAMMOTH
137 AM MDT THU MAR 12 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS 1 TO 4 INCHES
ACROSS MOST HIGHER ELEVATIONS, AND ACCUMULATIONS 6 TO 11 INCHES
OVER THE PITCHSTONE PLATEAU. UP TO 1 INCH NEAR MAMMOTH. 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.
WYZ012-130000-
/O.CON.KRIW.WW.Y.0012.000000T0000Z-260313T0600Z/
TETON AND GROS VENTRE MOUNTAINS-
137 AM MDT THU MAR 12 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS 6 TO 10 INCHES
ABOVE 8500 FEET, WITH ISOLATED HIGHER TOTALS. WINDS GUSTING AS
HIGH AS 60 MPH.
* WHERE...TETON AND GROS VENTRE MOUNTAINS.
* WHEN...UNTIL MIDNIGHT MDT TONIGHT.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE MORNING AND EVENING COMMUTES ALONG TETON AND
TOGWOTEE PASSES.
* ADDITIONAL DETAILS...A COMBINATION OF FALLING SNOW AND STRONG
WINDS WILL MAKE TRAVEL DIFFICULT AT TIMES. TOTAL SNOW
ACCUMULATIONS 4 TO 8 INCHES ACROSS TOGWOTEE PASS AND 2 TO 4 INCHES
ACROSS TETON 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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