Dense Fog Advisory
URGENT - WEATHER MESSAGE
National Weather Service Great Falls MT
103 AM MST Fri Nov 21 2025
MTZ326-211700-
/O.NEW.KTFX.FG.Y.0010.251121T0803Z-251121T1700Z/
Gallatin Valley-
Including the following locations: Bozeman and Gallatin Gateway
103 AM MST Fri Nov 21 2025
...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM MST THIS MORNING...
* WHAT...Visibility of less than one quarter of a mile in dense fog.
* WHERE...Gallatin Valley.
* WHEN...Until 10 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.
&&
$$
Moldan
Special Weather Statement
Special Weather Statement
National Weather Service Pocatello ID
528 AM MST Fri Nov 21 2025
IDZ053-054-058-059-061-211600-
Upper Snake River Plain-Lower Snake River Plain-
Marsh and Arbon Highlands-Franklin/Eastern Oneida Region-
Bear Lake Valley-
Including the cities of Idaho Falls, Rexburg, St. Anthony,
Pocatello, Blackfoot, American Falls, Shelley, Fort Hall, Inkom,
McCammon, Downey, Lava Hot Springs, Malad, Preston, Thatcher,
St. Charles, Montpelier, and Georgetown
528 AM MST Fri Nov 21 2025
...POCKETS OF DENSE FOG/FREEZING FOG THIS MORNING COULD IMPACT
THE MORNING COMMUTE...
Area observations and webcams indicate rapidly deteriorating
conditions this morning along several major travel corridors.
Pockets of dense fog and freezing fog could lead to visibilities
below one quarter of a mile.
If needing to commute this morning, allow extra time to reach your
destination and be prepared for sudden reductions in visibility.
Slow down, use low beam headlights, and leave extra space between
you and other motorists.
$$
Cropp
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.
$$
