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WWUS45 KRIW 261939
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1239 PM MST FRI DEC 26 2025
WYZ001-271200-
/O.EXT.KRIW.WW.Y.0040.000000T0000Z-251228T0000Z/
YELLOWSTONE NATIONAL PARK-
INCLUDING THE CITIES OF OLD FAITHFUL, MAMMOTH, AND LAKE
1239 PM MST FRI DEC 26 2025
..WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 PM MST SATURDAY
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 2 AND 6
INCHES ACROSS THE LOWER ELEVATIONS, AND 8 TO 14 INCHES ACROSS THE
HIGHER ELEVATIONS. PORTIONS OF SOUTHWESTERN YNP, SUCH AS
PITCHSTONE PLATEAU, MAY SEE HIGHER AMOUNTS NEARING 20 INCHES.
WINDS FROM THE SOUTHWEST AT 10 TO 20 MPH WITH PERIODIC GUSTS UP TO
30 MPH.
* WHERE...YELLOWSTONE NATIONAL PARK.
* WHEN...UNTIL 5 PM MST SATURDAY.
* IMPACTS...TRAVEL WILL BE DIFFICULT IN THE BACKCOUNTRY.
* ADDITIONAL DETAILS...ADVISORIES HAVE BEEN EXTENDED THROUGH
SATURDAY EVENING DUE TO A SECOND PUSH OF SNOW THAT WILL ARRIVE
EARLY SATURDAY MORNING AND LINGER INTO THE AFTERNOON.
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 .
WYZ002-012-014-024-271200-
/O.EXT.KRIW.WW.Y.0040.000000T0000Z-251228T0000Z/
ABSAROKA MOUNTAINS-TETON AND GROS VENTRE MOUNTAINS-WIND RIVER
MOUNTAINS WEST-SALT RIVER AND WYOMING RANGES-
1239 PM MST FRI DEC 26 2025
..WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 PM MST SATURDAY
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 8 AND 14
INCHES, WITH AMOUNTS OF 14 TO 20 INCHES AT THE HIGHER ELEVATIONS.
SOME OF THE HIGHEST PEAKS MAY SEE ISOLATED AMOUNTS NEARING 2 FEET.
WINDS FROM THE SOUTHWEST AT 15 TO 25 MPH WITH PERIODIC GUSTS OF 25
TO 35 MPH.
* WHERE...WIND RIVER MOUNTAINS WEST, ABSAROKA MOUNTAINS, TETON AND
GROS VENTRE MOUNTAINS, AND SALT RIVER AND WYOMING RANGES.
* WHEN...UNTIL 5 PM MST SATURDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT, ESPECIALLY ACROSS
MOUNTAIN PASSES.
* ADDITIONAL DETAILS...SNOW TOTALS OF 3 TO 6 INCHES ON SOUTH PASS
AND 6 TO 12 INCHES ON TOGWOTEE PASS AND TETON PASSES. ADVISORIES
HAVE BEEN EXTENDED THROUGH SATURDAY EVENING DUE TO A SECOND PUSH
OF SNOW THAT WILL ARRIVE EARLY SATURDAY MORNING AND LINGER INTO
THE AFTERNOON.
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/ .
DZIEWALTOWSKI
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