281
WWUS45 KRIW 042016
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
116 PM MST WED MAR 4 2026
WYZ001-051430-
/O.NEW.KRIW.WW.Y.0011.260305T0600Z-260306T0000Z/
YELLOWSTONE NATIONAL PARK-
INCLUDING THE CITIES OF LAKE, MAMMOTH, AND OLD FAITHFUL
116 PM MST WED MAR 4 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 5 PM
MST THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS 6 TO 12 INCHES OVER
THE PITCHSTONE PLATEAU OF SOUTHWEST YNP. 3 TO 6 INCHES IN CENTRAL
PORTIONS OF YELLOWSTONE, AND BETWEEN 1 AND 4 INCHES IN LAMAR
VALLEY AND MAMMOTH.
* WHERE...YELLOWSTONE NATIONAL PARK.
* WHEN...FROM 11 PM THIS EVENING TO 5 PM MST THURSDAY.
* IMPACTS...BACKCOUNTRY TRAVEL COULD BE DIFFICULT.
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.
WYZ012-024-051430-
/O.NEW.KRIW.WW.Y.0011.260305T0600Z-260306T0000Z/
TETON AND GROS VENTRE MOUNTAINS-SALT RIVER AND WYOMING RANGES-
116 PM MST WED MAR 4 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 5 PM
MST THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS OF 6 TO 12 INCHES
ABOVE 8,500 FEET WITH AMOUNTS OF 4 TO 8 INCHES ELSEWHERE.
* WHERE...TETON AND GROS VENTRE MOUNTAINS AND SALT RIVER AND WYOMING
RANGES.
* WHEN...FROM 11 PM THIS EVENING TO 5 PM MST THURSDAY.
* IMPACTS...TRAVEL COULD BE DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE THURSDAY MORNING AND EVENING COMMUTES ESPECIALLY
FOR MOUNTAIN PASSES LIKE 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.
WYZ002-051430-
/O.NEW.KRIW.WW.Y.0011.260305T1200Z-260306T0600Z/
ABSAROKA MOUNTAINS-
116 PM MST WED MAR 4 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM TO 11 PM MST
THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 4 TO 10
INCHES ESPECIALLY ALONG EASTERN SLOPES OF THE SOUTHERN PORTIONS OF
THE RANGE.
* WHERE...ABSAROKA MOUNTAINS.
* WHEN...FROM 5 AM TO 11 PM MST THURSDAY.
* IMPACTS...TRAVEL COULD BE DIFFICULT.
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.
WYZ007>009-051430-
/O.NEW.KRIW.WW.Y.0011.260305T1900Z-260306T1800Z/
OWL CREEK AND BRIDGER MOUNTAINS-BIGHORN MOUNTAINS WEST-BIGHORN
MOUNTAINS SOUTHEAST-
116 PM MST WED MAR 4 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM NOON THURSDAY TO 11 AM MST
FRIDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 6 AND 12
INCHES MAINLY ACROSS THE HIGHER PEAKS OF THE NORTHERN AND SOUTHERN
PORTIONS OF THE RANGE. SNOW ACCUMULATIONS ELSEWHERE RANGE BETWEEN
2 AND 6 INCHES. WINDS GUSTING AS HIGH AS 40 MPH.
* WHERE...OWL CREEK AND BRIDGER MOUNTAINS, BIGHORN MOUNTAINS
SOUTHEAST, AND BIGHORN MOUNTAINS WEST.
* WHEN...FROM NOON THURSDAY TO 11 AM MST FRIDAY.
* IMPACTS...TRAVEL COULD BE DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE THURSDAY EVENING AND FRIDAY MORNING COMMUTES
ESPECIALLY ALONG POWDER RIVER 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.
WYZ014-015-051430-
/O.NEW.KRIW.WW.Y.0011.260306T0000Z-260307T0000Z/
WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-
116 PM MST WED MAR 4 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THURSDAY TO 5 PM MST
FRIDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 8 AND 14
INCHES ALONG THE EASTERN SLOPES WITH LESSER AMOUNTS OF 4 TO 8
INCHES ACROSS WESTERN SLOPES. SNOW ACCUMULATIONS ALONG SOUTH PASS
ARE FORECAST TO RANGE FROM 6 TO 14 INCHES.
* WHERE...WIND RIVER MOUNTAINS EAST AND WIND RIVER MOUNTAINS WEST.
* WHEN...FROM 5 PM THURSDAY TO 5 PM MST FRIDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT OVER SOUTH PASS. THE
HAZARDOUS CONDITIONS COULD IMPACT THE THURSDAY EVENING AND FRIDAY
MORNING COMMUTES.
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.
WYZ018-020-051430-
/O.NEW.KRIW.WW.Y.0011.260306T0300Z-260306T2100Z/
LANDER FOOTHILLS-NATRONA COUNTY LOWER ELEVATIONS-
INCLUDING THE CITIES OF LANDER AND CASPER
116 PM MST WED MAR 4 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THURSDAY TO 2 PM MST
FRIDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 3 AND 6
INCHES. LOCALLY HIGHER AMOUNTS MAY BE POSSIBLE ALONG THE HIGHER
ELEVATIONS OF THE LANDER FOOTHILLS AND FROM CASPER WEST TOWARDS
HILAND.
* WHERE...LANDER FOOTHILLS AND NATRONA COUNTY LOWER ELEVATIONS.
* WHEN...FROM 8 PM THURSDAY TO 2 PM MST FRIDAY.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE FRIDAY MORNING COMMUTE.
* ADDITIONAL DETAILS...PRECIPITATION MAY INITIALLY BEGIN AS RAIN
BEFORE TRANSITIONING OVER TO SNOW LATE THURSDAY EVENING.
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.
WYZ019-022-051430-
/O.NEW.KRIW.WW.Y.0011.260306T0300Z-260307T0000Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-CASPER MOUNTAIN-
INCLUDING THE CITIES OF JEFFREY CITY
116 PM MST WED MAR 4 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THURSDAY TO 5 PM MST
FRIDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 6 AND 12
INCHES FOR LOCATIONS ABOVE 7000 FEET WITH LESSER AMOUNTS OF 4 TO 8
INCHES ELSEWHERE. WINDS MAY GUST AS HIGH AS 35 MPH.
* WHERE...CASPER MOUNTAIN AND GREEN MOUNTAINS AND RATTLESNAKE RANGE.
* WHEN...FROM 8 PM THURSDAY TO 5 PM MST FRIDAY.
* IMPACTS...TRAVEL COULD BE DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE FRIDAY MORNING AND EVENING COMMUTES.
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.
WYZ028>030-051430-
/O.NEW.KRIW.WW.Y.0011.260306T0600Z-260307T0000Z/
ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY-
INCLUDING THE CITIES OF GREEN RIVER, WAMSUTTER, AND ROCK SPRINGS
116 PM MST WED MAR 4 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THURSDAY TO 5 PM MST
FRIDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 2 AND 6
INCHES WITH LOCALLY HIGHER AMOUNTS NEARING 8 INCHES FOR ELEVATIONS
ABOVE 8000 FEET. WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...EAST SWEETWATER COUNTY, FLAMING GORGE, AND ROCK SPRINGS
AND GREEN RIVER.
* WHEN...FROM 11 PM THURSDAY TO 5 PM MST FRIDAY.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE FRIDAY MORNING AND EVENING COMMUTES
ESPECIALLY ALONG THE I-80 CORRIDOR.
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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