Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Riverton WY
456 AM MST Thu Dec 4 2025
WYZ001>020-022>030-051600-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-Southeast Bighorn Basin-
Owl Creek and Bridger Mountains-Bighorn Mountains West-
Bighorn Mountains Southeast-Northeast Johnson County-
Southeast Johnson County-Teton and Gros Ventre Mountains-
Jackson Hole-Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
456 AM MST Thu Dec 4 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO
2 PM MST SATURDAY...
...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON
TO 2 PM MST SATURDAY...
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and tonight.
Periods of moderate to heavy snow begins late this afternoon and
evening and continues through the overnight hours across the Western
Mountains, Jackson and Star Valleys, and the northern portions of the
western Bighorns. Gusty winds combined with heavy snow could cause
reduced visibilities and hazardous travel.
Wind gusts of 20 to 35 mph are expected across the Wind Corridor,
the Absarokas, including the Cody area, and the upper Wind River
Basin through the afternoon. Isolated gusts of 50 mph are possible in
wind prone locations.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday through Saturday...Periods of snow throughout the day Friday,
with moderate to heavy snow beginning Friday evening and continuing
through Saturday morning across the Western Mountains and the
portions of the western Bighorns. Gusty 25 to 40 mph winds combined
with moderate to heavy snow could cause reduced visibilities and
hazardous travel.
Wind gusts of 30 to 40 mph late Friday night across southern
Wyoming, the Absarokas, northern Johnson County, and the Wind River
Basin through the afternoon. Isolated gusts over 55 mph are also
possible.
Sunday through Wednesday...Multiple chances for snow across the
western mountains and widespread breezy to gusty winds.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.
$$
Hazardous Weather Outlook
National Weather Service Sioux Falls SD
440 AM CST Thu Dec 4 2025
IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ038>040-050-052>071-051045-
Lyon-Osceola-Dickinson-Sioux-O`Brien-Clay-Plymouth-Cherokee-
Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson-
Pipestone-Rock-Dixon-Dakota-Beadle-Kingsbury-Brookings-Gregory-
Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook-
Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-Yankton-
Union-
440 AM CST Thu Dec 4 2025
This Hazardous Weather Outlook is for northwest Iowa, west central
Iowa, southwest Minnesota, northeast Nebraska, central South
Dakota, east central South Dakota, south central South Dakota and
southeast South Dakota.
.DAY ONE...Today and tonight.
Cold wind chills as low as 25 below expected through this morning.
Wind gusts to 40 mph will lead to patchy blowing snow across far
eastern South Dakota, southwestern Minnesota, and into northwestern
Iowa later today into the evening.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Light mixed precipitation is possible Friday into Friday evening.
Accumulations and impacts are expected to be minor.
Confidence is increasing in accumulating snowfall Saturday into
Saturday night. Keep an eye on the forecast if you have travel plans.
Details remain uncertain, but additional snow chances continue into
mid next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
Hazardous Weather Outlook
National Weather Service Cheyenne WY
302 AM MST Thu Dec 4 2025
NEZ002-003-019>021-054-055-095-096-WYZ101>119-051015-
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
Laramie Valley-South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
302 AM MST Thu Dec 4 2025
This hazardous weather outlook is for portions of panhandle
Nebraska...east central Wyoming...south central Wyoming and
southeast Wyoming.
.DAY ONE...TODAY AND TONIGHT
- Winds will pick up again Thursday morning in the wind prone
areas. Another round of High Wind Warnings have been issued.
- Areas of blowing snow Thursday may impact travel conditions
in the wind prone areas of southeast Wyoming.
.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
- Prolonged period of mountain snow expected Thursday night
through Sunday Morning. Winter Storm Warnings have been issued
for Sierra Madre and Snowy Ranges.
.Spotter information statement...
Spotter activation will not be needed.
$$
