056
WWUS45 KRIW 171902
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
102 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
102 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
5 INCHES, HIGHEST CLOSEST TO THE MOUNTAINS. WINDS GUSTING AS HIGH
AS 55 MPH.
* 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 RANGING FROM 30 TO 35
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
102 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. NORTH WINDS GUSTING AS HIGH AS 45 MPH.
* WHERE...JOHNSON COUNTY.
* WHEN...UNTIL NOON MDT FRIDAY.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE THURSDAY EVENING COMMUTE.
* ADDITIONAL DETAILS...SNOW ACCUMULATIONS MAY BE HINDERED DURING THE
DAYTIME HOURS THURSDAY DUE TO TEMPERATURES RANGING FROM 30 TO 35
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.
WYZ015-181300-
/O.CON.KRIW.WS.W.0010.000000T0000Z-250418T1800Z/
WIND RIVER MOUNTAINS EAST-
102 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. WINDS GUSTING AS HIGH AS 50 MPH.
* 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 JEFFREY CITY, SHOSHONI, DUBOIS, LANDER,
AND RIVERTON
102 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 AROUND 12 INCHES POSSIBLE IN THE
LANDER FOOTHILLS. NORTHERLY WIND FREQUENTLY GUSTING 20 TO 30 MPH.
* 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 COMMUTE.
* ADDITIONAL DETAILS...SNOW ACCUMULATIONS MAY BE HINDERED DURING THE
DAYTIME HOURS THURSDAY, ESPECIALLY AT ELEVATIONS BELOW 5500 FEET,
DUE TO TEMPERATURES RANGING FROM 30 TO 35 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
102 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 WINDS GUSTING AS HIGH AS 40 MPH.
* 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 RANGING FROM 30 TO 35
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-
102 PM MDT THU APR 17 2025
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...HEAVY SNOW. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 15 AND 22
INCHES. NORTH TO NORTHEAST WINDS GUSTING AS HIGH AS 40 MPH.
* 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 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.
WYZ030-181300-
/O.EXA.KRIW.WW.Y.0021.000000T0000Z-250418T1800Z/
EAST SWEETWATER COUNTY-
INCLUDING THE CITIES OF WAMSUTTER
102 PM MDT THU APR 17 2025
..WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 4 AND 6 INCHES,
WITH ISOLATED AREAS UP TO 8 INCHES. NORTH TO NORTHEAST WINDS
GUSTING AS HIGH AS 45 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.
* 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.
WYZ002-181300-
/O.CON.KRIW.WW.Y.0021.000000T0000Z-250418T1800Z/
ABSAROKA MOUNTAINS-
102 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. WINDS GUSTING AS
HIGH AS 50 MPH.
* 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-
102 PM MDT THU APR 17 2025
..WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT FRIDAY
* WHAT...SNOW. ADDITIONAL SNOW ACCUMULATIONS BETWEEN 5 AND 9 INCHES,
WITH UP TO 12 INCHES AT THE HIGHEST ELEVATIONS. WINDS GUSTING AS
HIGH AS 50 MPH.
* 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
RANGING FROM 30 TO 35.
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/ .
WITTMANN
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