597
WWUS45 KRIW 190537
WSWRIW
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1037 PM MST WED FEB 18 2026
WYZ001-012-014-015-024-190645-
/O.EXP.KRIW.WW.Y.0008.000000T0000Z-260219T0600Z/
YELLOWSTONE NATIONAL PARK-TETON AND GROS VENTRE MOUNTAINS-WIND
RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-SALT RIVER AND
WYOMING RANGES-
INCLUDING THE CITIES OF LAKE, MAMMOTH, AND OLD FAITHFUL
1037 PM MST WED FEB 18 2026
..WINTER WEATHER ADVISORY WILL EXPIRE AT 11 PM MST THIS EVENING
THE MAIN THREAT HAS ENDED WITH ONLY LINGERING FLURRIES AT BEST STILL
FALLING.
WYZ011-020-191800-
/O.CON.KRIW.WS.W.0001.000000T0000Z-260219T1800Z/
SOUTHEAST JOHNSON COUNTY-NATRONA COUNTY LOWER ELEVATIONS-
INCLUDING THE CITIES OF CASPER AND KAYCEE
1037 PM MST WED FEB 18 2026
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 3 AND 6
INCHES AROUND CASPER. HIGHER AMOUNTS OF 4 TO 8 INCHES ARE EXPECTED
ACROSS NORTHERN NATRONA INTO SOUTHERN JOHNSON COUNTIES. WINDS
GUSTING AS HIGH AS 40 MPH.
* WHERE...NATRONA COUNTY LOWER ELEVATIONS AND SOUTHEAST JOHNSON
COUNTY.
* WHEN...UNTIL 11 AM MST THURSDAY.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE THURSDAY MORNING COMMUTE.
* ADDITIONAL DETAILS...THE HEAVIEST SNOWFALL IS FORECAST TO OCCUR
LATE WEDNESDAY EVENING INTO THE EARLY MORNING HOURS THURSDAY WITH
SNOWFALL RATES UP TO 1 INCH AN HOUR. WINDS WILL BE GUSTING UP TO
40 MPH DURING THIS TIME, WHICH MAY LEAD TO BLOWING SNOW AND
REDUCED VISIBILITIES.
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.
WYZ003-004-191800-
/O.CON.KRIW.WW.Y.0008.000000T0000Z-260219T1800Z/
CODY FOOTHILLS-NORTH BIGHORN BASIN-
INCLUDING THE CITIES OF SHELL, LOVELL, BASIN, MEETEETSE, POWELL,
CODY, GREYBULL, AND CLARK
1037 PM MST WED FEB 18 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 1 AND 4
INCHES. WINDS GUSTING AS HIGH AS 45 MPH.
* WHERE...CODY FOOTHILLS AND NORTH BIGHORN BASIN.
* WHEN...UNTIL 11 AM MST THURSDAY.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE WEDNESDAY EVENING AND THURSDAY MORNING
COMMUTES.
* ADDITIONAL DETAILS...THE HEAVIEST SNOWFALL IS FORECAST TO OCCUR
LATE WEDNESDAY EVENING INTO THE EARLY MORNING HOURS THURSDAY.
WINDS WILL BE GUSTING UP TO 45 MPH DURING THIS TIME, WHICH MAY
LEAD TO BLOWING SNOW AND 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.
WYZ005>007-191800-
/O.CON.KRIW.WW.Y.0008.000000T0000Z-260219T1800Z/
SOUTHWEST BIGHORN BASIN-SOUTHEAST BIGHORN BASIN-OWL CREEK AND
BRIDGER MOUNTAINS-
INCLUDING THE CITIES OF WORLAND, TEN SLEEP, AND THERMOPOLIS
1037 PM MST WED FEB 18 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 3 AND 6
INCHES WITH LOCALLY HIGHER AMOUNTS SOUTH AND EAST OF THE WORLAND
TO THERMOPOLIS LINE. WINDS GUSTING AS HIGH AS 40 MPH.
* WHERE...OWL CREEK AND BRIDGER MOUNTAINS, SOUTHWEST BIGHORN BASIN,
AND SOUTHEAST BIGHORN BASIN.
* WHEN...FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY. THE
STEADIEST SNOW WILL FALL WEDNESDAY NIGHT.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE THURSDAY MORNING COMMUTE.
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.
WYZ008-009-191800-
/O.CON.KRIW.WW.Y.0008.000000T0000Z-260219T1800Z/
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
1037 PM MST WED FEB 18 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 3 AND 7
INCHES. WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...BIGHORN MOUNTAINS SOUTHEAST AND BIGHORN MOUNTAINS WEST.
* WHEN...FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY. THE
STEADIEST SNOW WILL FALL WEDNESDAY NIGHT.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE THURSDAY MORNING COMMUTE.
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.
WYZ010-191800-
/O.CON.KRIW.WW.Y.0008.000000T0000Z-260219T1800Z/
NORTHEAST JOHNSON COUNTY-
INCLUDING THE CITIES OF BUFFALO
1037 PM MST WED FEB 18 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 2 AND 4
INCHES. WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...NORTHEAST JOHNSON COUNTY.
* WHEN...UNTIL 11 AM MST THURSDAY.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE THURSDAY MORNING COMMUTE.
* ADDITIONAL DETAILS...THE HEAVIEST SNOWFALL IS FORECAST TO OCCUR
LATE WEDNESDAY EVENING INTO THE EARLY MORNING HOURS THURSDAY.
WINDS WILL BE GUSTING UP TO 30 MPH DURING THIS TIME, WHICH MAY
LEAD TO BLOWING SNOW AND 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.
WYZ017-018-191800-
/O.CON.KRIW.WW.Y.0008.000000T0000Z-260219T1800Z/
WIND RIVER BASIN-LANDER FOOTHILLS-
INCLUDING THE CITIES OF SHOSHONI, LANDER, AND RIVERTON
1037 PM MST WED FEB 18 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 3 AND 6
INCHES. WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...LANDER FOOTHILLS AND WIND RIVER BASIN.
* WHEN...FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY. THE
STEADIEST SNOW WILL FALL WEDNESDAY NIGHT.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE THURSDAY MORNING COMMUTE.
* ADDITIONAL DETAILS...THE HEAVIEST SNOWFALL IS FORECAST TO OCCUR
LATE WEDNESDAY EVENING INTO THE EARLY MORNING HOURS THURSDAY.
WINDS WILL BE GUSTING UP TO 35 MPH DURING THIS TIME, WHICH MAY
LEAD TO BLOWING SNOW AND 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.
WYZ019-022-191800-
/O.CON.KRIW.WW.Y.0008.000000T0000Z-260219T1800Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-CASPER MOUNTAIN-
INCLUDING THE CITIES OF JEFFREY CITY
1037 PM MST WED FEB 18 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...
* WHAT...SNOW EXPECTED. TOTAL SNOW ACCUMULATIONS BETWEEN 2 AND 6
INCHES. WINDS GUSTING AS HIGH AS 45 MPH.
* WHERE...CASPER MOUNTAIN AND GREEN MOUNTAINS AND RATTLESNAKE RANGE.
* WHEN...UNTIL 11 AM MST THURSDAY.
* IMPACTS...PLAN ON SLIPPERY ROAD CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE WEDNESDAY EVENING AND THURSDAY MORNING
COMMUTES.
* ADDITIONAL DETAILS...THE HEAVIEST SNOWFALL IS FORECAST TO OCCUR
LATE WEDNESDAY EVENING INTO THE EARLY MORNING HOURS THURSDAY.
WINDS WILL BE GUSTING UP TO 45 MPH DURING THIS TIME, WHICH MAY
LEAD TO BLOWING SNOW AND 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/ .
LOWE
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