029
WWUS45 KRIW 021716
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1116 AM MDT THU APR 2 2026
WYZ010-031330-
/O.EXB.KRIW.WS.W.0003.260403T0700Z-260404T0000Z/
NORTHEAST JOHNSON COUNTY-
INCLUDING THE CITIES OF BUFFALO
1116 AM MDT THU APR 2 2026
..WINTER STORM WARNING IN EFFECT FROM 1 AM TO 6 PM MDT FRIDAY
* WHAT...SNOW EXPECTED, HEAVY AT TIMES. TOTAL SNOW ACCUMULATIONS
BETWEEN 4 AND 6 INCHES, PRIMARILY BETWEEN 3 AM AND 12 PM.
NORTH-NORTHWEST WINDS GUSTING 35 TO 40 MPH.
* WHERE...NORTHEAST JOHNSON COUNTY.
* WHEN...FROM 1 AM TO 6 PM MDT FRIDAY.
* IMPACTS...ROADS, AND ESPECIALLY BRIDGES AND OVERPASSES, WILL
LIKELY BECOME SLICK AND HAZARDOUS. TRAVEL COULD BE DIFFICULT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN
YOUR VEHICLE IN CASE OF AN EMERGENCY.
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 .
WYZ001-012-031330-
/O.CON.KRIW.WS.W.0003.000000T0000Z-260404T0000Z/
YELLOWSTONE NATIONAL PARK-TETON AND GROS VENTRE MOUNTAINS-
INCLUDING THE CITIES OF LAKE, MAMMOTH, AND OLD FAITHFUL
1116 AM MDT THU APR 2 2026
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT FRIDAY
* WHAT...HEAVY SNOW. TOTAL SNOW ACCUMULATIONS BETWEEN 12 AND 18
INCHES AND UP TO 24 INCHES ALONG THE WESTERN SLOPES OF THE TETONS.
6 TO 10 INCHES OF TOTAL SNOW ACCUMULATION IS EXPECTED IN
YELLOWSTONE NATIONAL PARK, WITH AMOUNTS UP TO 18 INCHES ALONG
HIGHER ELEVATIONS ACROSS SOUTHERN PORTIONS OF THE PARK. THE
MAMMOTH AREA WILL SEE 1 TO 3 INCHES. WINDS COULD GUST AS HIGH AS
45 MPH.
* WHERE...TETON AND GROS VENTRE MOUNTAINS AND YELLOWSTONE NATIONAL
PARK.
* WHEN...UNTIL 6 PM MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT, INCLUDING OVER TETON
PASS AND TOGWOTEE PASS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN
YOUR VEHICLE IN CASE OF AN EMERGENCY.
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 .
WYZ014-015-024-031330-
/O.CON.KRIW.WS.W.0003.000000T0000Z-260404T0000Z/
WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-SALT RIVER
AND WYOMING RANGES-
1116 AM MDT THU APR 2 2026
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT FRIDAY
* WHAT...HEAVY SNOW. TOTAL SNOW ACCUMULATIONS BETWEEN 10 AND 16
INCHES POSSIBLE. 3 TO 6 INCHES ARE EXPECTED ALONG SOUTH PASS AND
SALT RIVER PASS. WINDS COULD GUST AS HIGH AS 50 MPH.
* WHERE...WIND RIVER MOUNTAINS EAST, WIND RIVER MOUNTAINS WEST, AND
SALT RIVER AND WYOMING RANGES.
* WHEN...UNTIL 6 PM MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT, INCLUDING OVER SOUTH
PASS AND SALT RIVER PASS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN
YOUR VEHICLE IN CASE OF AN EMERGENCY.
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 .
WYZ008-009-031330-
/O.CON.KRIW.WS.W.0003.260403T0000Z-260404T0000Z/
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
1116 AM MDT THU APR 2 2026
...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO
6 PM MDT FRIDAY...
* WHAT...HEAVY SNOW. TOTAL SNOW ACCUMULATIONS BETWEEN 12 AND 20
INCHES, WITH THE HIGHEST AMOUNTS ON THE WESTERN SLOPES OF THE
NORTHERN BIGHORNS. WINDS COULD GUST AS HIGH AS 55 MPH.
* WHERE...BIGHORN MOUNTAINS SOUTHEAST AND BIGHORN MOUNTAINS WEST.
* WHEN...FROM 6 PM THIS EVENING TO 6 PM MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT, INCLUDING OVER GRANITE
PASS AND POWDER RIVER PASS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN
YOUR VEHICLE IN CASE OF AN EMERGENCY.
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 .
WYZ004-006-031330-
/O.EXB.KRIW.WW.Y.0014.260403T0500Z-260403T1800Z/
NORTH BIGHORN BASIN-SOUTHEAST BIGHORN BASIN-
INCLUDING THE CITIES OF TEN SLEEP, POWELL, BASIN, GREYBULL,
LOVELL, SHELL, AND WORLAND
1116 AM MDT THU APR 2 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO NOON
MDT FRIDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 2 AND 6
INCHES, WITH THE HIGHER AMOUNTS ALONG THE FOOTHILLS OF THE BIGHORN
MOUNTAINS FROM SHELL TO TEN SLEEP TO BIG TRAILS. NORTHWEST WINDS
GUSTING AS HIGH AS 35 TO 40 MPH.
* WHERE...SOUTHEAST BIGHORN BASIN AND NORTH BIGHORN BASIN.
* WHEN...FROM 11 PM THIS EVENING TO NOON MDT FRIDAY.
* IMPACTS...ROADS, AND ESPECIALLY BRIDGES AND OVERPASSES, WILL
LIKELY BECOME SLICK AND HAZARDOUS. 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 .
WYZ011-020-022-031330-
/O.EXB.KRIW.WW.Y.0014.260403T1200Z-260404T0000Z/
SOUTHEAST JOHNSON COUNTY-NATRONA COUNTY LOWER ELEVATIONS-CASPER
MOUNTAIN-
INCLUDING THE CITIES OF CASPER AND KAYCEE
1116 AM MDT THU APR 2 2026
..WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM TO 6 PM MDT FRIDAY
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS FROM 1 TO 5 INCHES,
WITH HIGHER AMOUNTS EXPECTED IN FAR SOUTHEAST JOHNSON COUNTY,
AROUND MIDWEST AND EDGERTON, HILAND, AND THE SOUTH SIDE OF CASPER.
CASPER MOUNTAIN IS EXPECTED TO SEE 6 TO 8 INCHES OF SNOW. WINDS
GUSTING AS HIGH AS 35 TO 40 MPH.
* WHERE...CASPER MOUNTAIN, NATRONA COUNTY LOWER ELEVATIONS, AND
SOUTHEAST JOHNSON COUNTY.
* WHEN...FROM 6 AM TO 6 PM MDT FRIDAY.
* IMPACTS...ROADS, AND ESPECIALLY BRIDGES AND OVERPASSES, WILL
LIKELY BECOME SLICK AND HAZARDOUS. PLAN ON SLIPPERY ROAD
CONDITIONS.
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 .
WYZ002-031330-
/O.CON.KRIW.WW.Y.0014.000000T0000Z-260404T0000Z/
ABSAROKA MOUNTAINS-
1116 AM MDT THU APR 2 2026
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT FRIDAY
* WHAT...SNOW. TOTAL SNOW ACCUMULATIONS BETWEEN 6 AND 12 INCHES
ALONG HIGHER TERRAIN. WINDS GUSTING AS HIGH AS 55 MPH.
* WHERE...ABSAROKA MOUNTAINS.
* WHEN...UNTIL 6 PM MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE VERY 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 .
WYZ013-023-031330-
/O.CON.KRIW.WW.Y.0014.000000T0000Z-260404T0000Z/
JACKSON HOLE-STAR VALLEY-
INCLUDING THE CITIES OF JACKSON, AFTON, ALPINE, STAR VALLEY
RANCH, AND THAYNE
1116 AM MDT THU APR 2 2026
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT FRIDAY
* WHAT...SNOW. TOTAL SNOW ACCUMULATIONS BETWEEN 2 AND 4 INCHES.
WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...JACKSON HOLE AND STAR VALLEY.
* WHEN...UNTIL 6 PM MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE THURSDAY EVENING AND FRIDAY MORNING COMMUTES.
* ADDITIONAL DETAILS...WARMER AIR AND GROUND TEMPERATURES WILL ALLOW
SOME OF THE SNOW TO MELT, ESPECIALLY ON ROADS. HOWEVER, DRIVERS
SHOULD BE PREPARED FOR SLICK SPOTS, INCLUDING ON BRIDGES AND
DURING PERIODS OF HEAVIER SNOWFALL RATES.
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/ .
MCDONALD
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