Dense Fog Advisory
URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
158 AM MST Fri Nov 21 2025
NEZ054-055-211800-
/O.NEW.KCYS.FG.Y.0023.251121T0900Z-251121T1800Z/
Kimball County-Cheyenne County-
Including the cities of Kimball, Sidney, and Brownson
158 AM MST Fri Nov 21 2025
...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM MST THIS MORNING...
* WHAT...Visibility as low as a quarter mile in dense fog.
* WHERE...Cheyenne County and Kimball County along Interstate 80.
* WHEN...Until 11 AM MST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.
&&
$$
Mose
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.
$$
Hazardous Weather Outlook
National Weather Service North Platte NE
319 AM CST Fri Nov 21 2025
NEZ004>010-022>029-035>038-056>059-069>071-094-220930-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-Grant-
Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-Logan-
Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
319 AM CST Fri Nov 21 2025 /219 AM MST Fri Nov 21 2025/
This Hazardous Weather Outlook is for portions of western and north
central Nebraska.
.DAY ONE...Today and tonight.
Patchy fog is possible this morning across the outlook area.
Visibilities as low as a half a mile are possible.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1101 AM MST Thu Nov 20 2025
COZ030>051-211815-
Jackson County Below 9000 Feet-
West Jackson and West Grand Counties Above 9000 Feet-
Grand and Summit Counties Below 9000 Feet-
South and East Jackson/Larimer/North and Northeast Grand/
Northwest Boulder Counties Above 9000 Feet-
South and Southeast Grand/West Central and Southwest Boulder/
Gilpin/Clear Creek/Summit/North and West Park Counties Above
9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Central and Southeast Park County-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Northeast Weld County-Central and South Weld County-Morgan County-
Central and East Adams and Arapahoe Counties-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
1101 AM MST Thu Nov 20 2025
This hazardous weather outlook is for northeast and north central
Colorado.
.DAY ONE...Today and Tonight
A storm system will move into Colorado bringing rain and snow to
the region later today through Friday morning. Rain amounts
exceeding a half inch will be possible over the northeast plains
with lighter amounts for the urban corridor. The mountains will
see light snowfall, up to 4 or 5 inches, with the highest amounts
occurring in the Front Range Mountains. The foothills and Palmer
Divide will see a mixture of rain and snow with the higher
foothills seeing light snow amounts.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday
Another weather disturbance will move into the area late Sunday,
bringing another chance of rain for lower elevations and snow to
high country Sunday night into Monday. Generally minor travel
impacts will be possible in the mountains.
Another round of snow and potential pre-Thanksgiving travel
impacts will be possible in the mountains toward Tuesday and
Wednesday. It will also turn colder with a chance of light snow
moving into the plains by the middle of next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
