# HEADLINE
--------------------
DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY
# DETAILS
--------------------
WHAT
Visibility one quarter mile or less in dense fog.
WHERE
Canyon Ferry Area, Elkhorn and Boulder Mountains, Beaverhead and Western Madison below 6000ft, Gallatin Valley, Gallatin and Madison County Mountains and Centennial Mountains, Madison River Valley, Missouri Headwaters, and Northwest Beaverhead County.
WHEN
Until noon MDT today.
IMPACTS
Low visibility could make driving conditions hazardous.
ISSUED AT
Monday, October 26, 2026 at 12:42 AM MDT
ISSUED BY
National Weather Service Great Falls MT
HEADER
URGENT - WEATHER MESSAGE
# PRECAUTIONARY/PREPAREDNESS ACTIONS
--------------------
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
# AREAS AFFECTED
--------------------
Gallatin and Madison County Mountains and Centennial Mountains, Beaverhead and Western Madison below 6000ft, Canyon Ferry Area, Elkhorn and Boulder Mountains, Gallatin Valley, Madison River Valley, Missouri Headwaters, Northwest Beaverhead County
Including the cities of Clancy, Corbin, Raynolds Pass, Elk Park Pass, Harrison, Cameron, Pony, Whitehall, Toston, Dewey, Ennis, Three Forks, Glen, Jeffers, Waterloo, Willow Creek, Chief Joseph Pass, Dillon, Winston, Gallatin Gateway, Wisdom, Montana City, Townsend, McAllister, Bozeman, Wickes, Boulder, Norris, Big Sky, Wise River, Bannack, West Yellowstone, Targhee Pass, Homestake Pass, and Big Hole Pass