059
WWUS45 KRIW 031047
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
447 AM MDT FRI APR 3 2026
WYZ001-012-040000-
/O.CON.KRIW.WS.W.0003.000000T0000Z-260404T0000Z/
YELLOWSTONE NATIONAL PARK-TETON AND GROS VENTRE MOUNTAINS-
INCLUDING THE CITIES OF MAMMOTH, OLD FAITHFUL, AND LAKE
447 AM MDT FRI APR 3 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...ADDITIONAL SNOW ACCUMULATIONS OF 4 TO 6 INCHES ACROSS THE
TETONS AND GROS VENTRE MOUNTAINS. UP TO THREE ADDITIONAL INCHES
ACROSS YELLOWSTONE NATIONAL PARK.
* WHERE...TETON AND GROS VENTRE MOUNTAINS AND YELLOWSTONE NATIONAL
PARK.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* 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 .
WYZ008-009-040000-
/O.CON.KRIW.WS.W.0003.000000T0000Z-260404T0000Z/
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
447 AM MDT FRI APR 3 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...HEAVY SNOW. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 6 AND 12
INCHES FOR HIGHER TERRAIN ACROSS THE SOUTHERN AND NORTHERN
BIGHORNS. ONLY 2 TO 4 INCHES OF ADDITIONAL ACCUMULATION ALONG
POWDER RIVER PASS. WINDS GUSTING AS HIGH AS 55 MPH.
* WHERE...BIGHORN MOUNTAINS SOUTHEAST AND BIGHORN MOUNTAINS WEST.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* 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 .
WYZ010-040000-
/O.CON.KRIW.WS.W.0003.000000T0000Z-260404T0000Z/
NORTHEAST JOHNSON COUNTY-
INCLUDING THE CITIES OF BUFFALO
447 AM MDT FRI APR 3 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...SNOW EXPECTED, HEAVY AT TIMES. TOTAL SNOW ACCUMULATIONS
BETWEEN 4 AND 6 INCHES, PRIMARILY BEFORE 12 PM. THE HEAVIEST SNOW
IS EXPECTED NORTH OF BUFFALO. NORTH-NORTHWEST WINDS GUSTING 35 TO
40 MPH.
* WHERE...NORTHEAST JOHNSON COUNTY.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* IMPACTS...ROADS, AND ESPECIALLY BRIDGES AND OVERPASSES, WILL
LIKELY BECOME SLICK AND HAZARDOUS, INCLUDING ALONG THE INTERSTATE
90 CORRIDOR. 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 .
WYZ014-015-024-040000-
/O.CON.KRIW.WS.W.0003.000000T0000Z-260404T0000Z/
WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-SALT RIVER
AND WYOMING RANGES-
447 AM MDT FRI APR 3 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...HEAVY SNOW. ADDITIONAL SNOW ACCUMULATIONS UP TO 4 INCHES
ALONG THE HIGHER TERRAIN. AROUND AN INCH OF ADDITIONAL
ACCUMULATION FOR SOUTH PASS AND SALT RIVER PASS. WINDS GUSTING 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 THIS EVENING.
* 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 .
WYZ002-040000-
/O.CON.KRIW.WW.Y.0014.000000T0000Z-260404T0000Z/
ABSAROKA MOUNTAINS-
447 AM MDT FRI APR 3 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS UP TO 3 INCHES. WINDS
GUSTING AS HIGH AS 40 MPH.
* WHERE...ABSAROKA MOUNTAINS.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* 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 .
WYZ004-006-031800-
/O.CON.KRIW.WW.Y.0014.000000T0000Z-260403T1800Z/
NORTH BIGHORN BASIN-SOUTHEAST BIGHORN BASIN-
INCLUDING THE CITIES OF GREYBULL, POWELL, BASIN, TEN SLEEP,
LOVELL, WORLAND, AND SHELL
447 AM MDT FRI APR 3 2026
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS UP TO 3 INCHES. WINDS
GUSTING AS HIGH AS 50 MPH.
* WHERE...SOUTHEAST BIGHORN BASIN AND NORTH BIGHORN BASIN.
* WHEN...UNTIL NOON MDT TODAY.
* 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 .
WYZ013-023-040000-
/O.CON.KRIW.WW.Y.0014.000000T0000Z-260404T0000Z/
JACKSON HOLE-STAR VALLEY-
INCLUDING THE CITIES OF AFTON, THAYNE, JACKSON, STAR VALLEY
RANCH, AND ALPINE
447 AM MDT FRI APR 3 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS UP TO ONE INCH.
* WHERE...JACKSON HOLE AND STAR VALLEY.
* WHEN...UNTIL 6 PM MDT THIS EVENING.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. 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 .
WYZ011-020-022-040000-
/O.CON.KRIW.WW.Y.0014.260403T1200Z-260404T0000Z/
SOUTHEAST JOHNSON COUNTY-NATRONA COUNTY LOWER ELEVATIONS-CASPER
MOUNTAIN-
INCLUDING THE CITIES OF KAYCEE AND CASPER
447 AM MDT FRI APR 3 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...
* 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...UNTIL 6 PM MDT THIS EVENING.
* 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 .
FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE, VISIT
HTTPS://WEATHER.GOV/RIW/ .
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