Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Riverton WY
313 AM MST Fri Nov 21 2025
WYZ001>020-022>030-221415-
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-
313 AM MST Fri Nov 21 2025
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and tonight.
Patchy areas of fog are possible during the morning mainly across
portions of southwestern, southern, and central WY. Fog should
gradually dissipate by the late morning. A few isolated showers may
be possible over far southern WY during the day.
.DAYS TWO THROUGH SEVEN...Saturday through Thanksgiving Day.
Monday through Wednesday... Potent disturbance looks to bring colder
temperatures and gusty winds. Light snow will also be possible
across western and far northern WY. Snow accumulations look minimal
at this time with an few inches possible in the mountains and a
coating for lower elevations. Some of the coldest temperatures of the
season look possible for Tuesday and Wednesday.
Thanksgiving Day... Another disturbance enters the region bringing
increased chances for snowfall across western and far northern WY.
Some impacts may be seen on western mountain passes however at this
time exact impacts remain uncertain at this time.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.
$$
Hazardous Weather Outlook
National Weather Service Cheyenne WY
300 AM MST Fri Nov 21 2025
NEZ002-003-019>021-054-055-095-096-WYZ101>119-221000-
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
Laramie Valley-South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
300 AM MST Fri Nov 21 2025
This hazardous weather outlook is for portions of panhandle
Nebraska...east central Wyoming...south central Wyoming and
southeast Wyoming.
.DAY ONE...TODAY AND TONIGHT
Light rain showers will transition to a rain/snow mix around sunrise.
Accumulations of less than half an inch expected east of the Laramie
Range, with 1-2in possible in the higher elevations.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
Second system with another shot of rain and possible snow hits our
southeastern zones early in the week with a deep Canadian low and
trough bringing notably colder temperatures just before and through
the holiday timeframe next week.
.Spotter information statement...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Sioux Falls SD
328 AM CST Fri Nov 21 2025
IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ038>040-050-052>071-220930-
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-
328 AM CST Fri Nov 21 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.
Patchy dense fog has developed across the region this morning.
Visibility may fall to less than a mile at times. The lowest
visibilities are mostly confined to low laying areas and river
valleys, west of the James River, and in northwestern Iowa. Be
prepared for rapidly changing visibility conditions.
In addition, widespread temperatures below freezing could result in
areas of freezing fog. This could result in slippery spots on
sidewalks and roadways. Fog should burn off by mid-morning.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
