025
WWUS45 KRIW 111651
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1051 AM MDT WED MAR 11 2026
WYZ002-014-015-111800-
/O.CAN.KRIW.WS.A.0002.260312T0000Z-260315T0000Z/
ABSAROKA MOUNTAINS-WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS
EAST-
1051 AM MDT WED MAR 11 2026
..WINTER STORM WATCH IS CANCELLED
WHILE THE COMBINATION OF SNOW AND WIND WILL IMPACT TRAVEL THURSDAY,
SNOW AMOUNTS HAVE DECREASED BELOW CRITICAL CRITERIA.
WYZ001-121300-
/O.UPG.KRIW.WS.A.0002.260312T0000Z-260315T0000Z/
/O.NEW.KRIW.WW.Y.0012.260312T0600Z-260313T0600Z/
YELLOWSTONE NATIONAL PARK-
INCLUDING THE CITIES OF MAMMOTH, LAKE, AND OLD FAITHFUL
1051 AM MDT WED MAR 11 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
MIDNIGHT MDT THURSDAY NIGHT...
* 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...FROM MIDNIGHT TONIGHT TO MIDNIGHT MDT THURSDAY NIGHT.
* 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.
WYZ012-121300-
/O.UPG.KRIW.WS.A.0002.260312T0000Z-260315T0000Z/
/O.NEW.KRIW.WW.Y.0012.260312T0600Z-260313T0600Z/
TETON AND GROS VENTRE MOUNTAINS-
1051 AM MDT WED MAR 11 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
MIDNIGHT MDT THURSDAY NIGHT...
* 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...FROM MIDNIGHT TONIGHT TO MIDNIGHT MDT THURSDAY NIGHT.
* 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/ .
WITTMANN
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