678
WWUS45 KRIW 172226
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
426 PM MDT THU APR 17 2025
WYZ003-005-180900-
/O.CON.KRIW.WS.W.0010.000000T0000Z-250418T0900Z/
CODY FOOTHILLS-SOUTHWEST BIGHORN BASIN-
INCLUDING THE CITIES OF CLARK, MEETEETSE, CODY, AND THERMOPOLIS
426 PM MDT THU APR 17 2025
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 AM MDT FRIDAY
* WHAT...SNOW EXPECTED. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 1 AND
3 INCHES, WITH 3 TO 5 INCHES AROUND MEETEETSE AND THERMOPOLIS.
NORTHERLY WIND FREQUENTLY GUSTING 20 TO 30 MPH THROUGH THURSDAY
EVENING.
* WHERE...SOUTHWEST BIGHORN BASIN AND CODY FOOTHILLS.
* WHEN...UNTIL 3 AM MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE DIFFICULT, ESPECIALLY ALONG WYOMING
HIGHWAY 120 BETWEEN CODY AND THERMOPOLIS.
* ADDITIONAL DETAILS...SNOW ACCUMULATIONS MAY BE HINDERED DURING THE
DAYTIME HOURS THURSDAY DUE TO TEMPERATURES AROUND 30 DEGREES AND
RECENT WARM TEMPERATURES.
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.
WYZ010-011-181300-
/O.CON.KRIW.WS.W.0010.000000T0000Z-250418T1800Z/
NORTHEAST JOHNSON COUNTY-SOUTHEAST JOHNSON COUNTY-
INCLUDING THE CITIES OF KAYCEE AND BUFFALO
426 PM MDT THU APR 17 2025
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...HEAVY SNOW. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 2 AND 4
INCHES. NORTHERLY WIND FREQUENTLY GUSTING 20 TO 30 MPH THROUGH
THURSDAY EVENING.
* WHERE...JOHNSON COUNTY.
* WHEN...UNTIL NOON MDT FRIDAY.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE THURSDAY EVENING COMMUTE.
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.
WYZ015-181300-
/O.CON.KRIW.WS.W.0010.000000T0000Z-250418T1800Z/
WIND RIVER MOUNTAINS EAST-
426 PM MDT THU APR 17 2025
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...HEAVY SNOW. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 12 AND 20
INCHES. NORTHERLY WIND FREQUENTLY GUSTING 25 TO 35 MPH THROUGH
THURSDAY EVENING.
* WHERE...WIND RIVER MOUNTAINS EAST.
* WHEN...UNTIL NOON MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT, ESPECIALLY ACROSS SOUTH
PASS. WIDESPREAD BLOWING SNOW COULD SIGNIFICANTLY REDUCE
VISIBILITY.
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.
WYZ016>019-181300-
/O.CON.KRIW.WS.W.0010.000000T0000Z-250418T1800Z/
UPPER WIND RIVER BASIN-WIND RIVER BASIN-LANDER FOOTHILLS-GREEN
MOUNTAINS AND RATTLESNAKE RANGE-
INCLUDING THE CITIES OF LANDER, RIVERTON, SHOSHONI, JEFFREY CITY,
AND DUBOIS
426 PM MDT THU APR 17 2025
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...HEAVY SNOW POSSIBLE. ADDITIONAL SNOW ACCUMULATIONS BETWEEN
4 AND 8 INCHES POSSIBLE, WITH 8 TO 12 INCHES POSSIBLE IN THE
LANDER FOOTHILLS. NORTHERLY WIND FREQUENTLY GUSTING 20 TO 30 MPH
ALONG US HIGHWAY 287 OVER BEAVER RIM EAST TOWARD MUDDY GAP THROUGH
THURSDAY EVENING.
* WHERE...GREEN MOUNTAINS AND RATTLESNAKE RANGE, LANDER FOOTHILLS,
UPPER WIND RIVER BASIN, AND WIND RIVER BASIN.
* WHEN...UNTIL NOON MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE THURSDAY EVENING AND FRIDAY MORNING COMMUTE.
* ADDITIONAL DETAILS...SNOW ACCUMULATIONS MAY BE HINDERED DURING THE
DAYTIME HOURS THURSDAY, ESPECIALLY AT ELEVATIONS BELOW 5500 FEET,
DUE TO TEMPERATURES AROUND 30 DEGREES AND RECENT WARM TEMPERATURES.
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.
WYZ020-181300-
/O.CON.KRIW.WS.W.0010.000000T0000Z-250418T1800Z/
NATRONA COUNTY LOWER ELEVATIONS-
INCLUDING THE CITIES OF CASPER
426 PM MDT THU APR 17 2025
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...HEAVY SNOW. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 4 AND 8
INCHES, WITH AMOUNTS UP TO AROUND 12 INCHES IN SOUTHERN CASPER.
NORTH TO NORTHEAST WIND FREQUENTLY GUSTING 25 TO 35 MPH THROUGH
THURSDAY EVENING.
* WHERE...NATRONA COUNTY LOWER ELEVATIONS.
* WHEN...UNTIL NOON MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE DIFFICULT. THE HAZARDOUS CONDITIONS
COULD IMPACT THE THURSDAY EVENING COMMUTE.
* ADDITIONAL DETAILS...SNOW ACCUMULATIONS MAY BE HINDERED DURING THE
DAYTIME HOURS THURSDAY DUE TO TEMPERATURES AROUND 30 DEGREES AND
RECENT WARM TEMPERATURES.
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.
WYZ022-181300-
/O.CON.KRIW.WS.W.0010.000000T0000Z-250418T1800Z/
CASPER MOUNTAIN-
426 PM MDT THU APR 17 2025
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...HEAVY SNOW. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 12 AND 20
INCHES. NORTH TO NORTHEAST WIND FREQUENTLY GUSTING 25 TO 35 MPH
THROUGH THURSDAY EVENING.
* WHERE...CASPER MOUNTAIN.
* WHEN...UNTIL NOON MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT. AREAS OF BLOWING SNOW
COULD SIGNIFICANTLY REDUCE VISIBILITY. THE HAZARDOUS CONDITIONS
COULD IMPACT THE THURSDAY EVENING AND FRIDAY MORNING COMMUTE.
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.
WYZ002-181300-
/O.CON.KRIW.WW.Y.0021.000000T0000Z-250418T1800Z/
ABSAROKA MOUNTAINS-
426 PM MDT THU APR 17 2025
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 3 AND 7 INCHES,
WITH UP TO 10 INCHES AT THE HIGHEST ELEVATIONS. NORTHEAST WIND
FREQUENTLY GUSTING 25 TO 35 MPH THROUGH THURSDAY EVENING.
* WHERE...ABSAROKA MOUNTAINS.
* WHEN...UNTIL NOON MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE DIFFICULT, ESPECIALLY OVER CHIEF JOSEPH
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.
WYZ007>009-181300-
/O.CON.KRIW.WW.Y.0021.000000T0000Z-250418T1800Z/
OWL CREEK AND BRIDGER MOUNTAINS-BIGHORN MOUNTAINS WEST-BIGHORN
MOUNTAINS SOUTHEAST-
426 PM MDT THU APR 17 2025
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 3 AND 7 INCHES,
WITH UP TO 12 INCHES AT THE HIGHEST ELEVATIONS. NORTHERLY WIND
GUSTING 25 TO 35 MPH THROUGH THURSDAY EVENING.
* WHERE...OWL CREEK AND BRIDGER MOUNTAINS, BIGHORN MOUNTAINS
SOUTHEAST, AND BIGHORN MOUNTAINS WEST.
* WHEN...UNTIL NOON MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE VERY DIFFICULT. AREAS OF BLOWING SNOW
COULD SIGNIFICANTLY REDUCE VISIBILITY AT TIMES. THE HAZARDOUS
CONDITIONS COULD IMPACT THE THURSDAY EVENING COMMUTE
* ADDITIONAL DETAILS...TOTAL SNOW ACCUMULATIONS THROUGH WIND RIVER
CANYON WILL BE 4 TO 6 INCHES, AND THURSDAY DAYTIME ACCUMULATIONS
MAY BE HINDERED DUE TO RECENT WARM WEATHER AND TEMPERATURES AROUND
30 DEGREES.
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.
WYZ030-181300-
/O.CON.KRIW.WW.Y.0021.000000T0000Z-250418T1800Z/
EAST SWEETWATER COUNTY-
INCLUDING THE CITIES OF WAMSUTTER
426 PM MDT THU APR 17 2025
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 4 AND 6 INCHES,
WITH ISOLATED AREAS UP TO 8 INCHES. NORTHEAST WIND FREQUENTLY
GUSTING 25 TO 35 MPH.
* WHERE...EAST SWEETWATER COUNTY.
* WHEN...UNTIL NOON MDT FRIDAY.
* IMPACTS...TRAVEL COULD BE DIFFICULT DUE TO FALLING AND BLOWING.
THE HAZARDOUS CONDITIONS COULD IMPACT THE THURSDAY EVENING
COMMUTE, ESPECIALLY ALONG INTERSTATE 80 FROM ROCK SPRINGS EASTWARD.
* ADDITIONAL DETAILS...SNOW SHOWERS THURSDAY AFTERNOON COULD BRING
LOCALLY HEAVY SNOW, WHICH WOULD BRING BRIEF PERIODS OF REDUCED
VISIBILITIES.
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/ .
CNJ
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