Dense Fog Advisory
Status
New Event Active alertStart Time
Mon 10/12/2026 11:00 PM EDTEnd Time
Tue 10/13/2026 02:00 PM EDTSignificance
AdvisoryImpacts
Low impact
Locations Affected
Great Falls, MT ∙ Helena West Side, MT ∙ Ennis Lake, MT ∙ Portage, MT ∙ Shonkin, MT ∙ Azure, MT ∙ Savoy, MT ∙ Lonesome Prairie, MT ∙ Parker School, MT ∙ Utica, MTFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Great Falls MT 1225 PM MDT Mon Oct 12 2026 ...DENSE FOG ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO NOON MDT TUESDAY... * WHAT...Visibility as low as one quarter of a mile in dense fog. * WHERE...Portions of central, north central, and southwest Montana. * WHEN...From 9 PM this evening to noon MDT Tuesday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Below freezing temperatures may lead to a glaze of ice on surfaces, most notably on bridges and overpasses. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Technical Header
MTZ303>306-309>314-319-321-323>326-131200- /O.NEW.KTFX.FG.Y.0002.261013T0300Z-261013T1800Z/ Eastern Glacier, Western Toole, and Central Pondera-Eastern Toole and Liberty-Hill County-Northern Blaine County-Eastern Pondera and Eastern Teton-Western and Central Chouteau County-Bears Paw Mountains and Southern Blaine-Cascade County below 5000ft-Judith Basin County and Judith Gap-Fergus County below 4500ft-Helena Valley-Meagher County Valleys-Canyon Ferry Area-Missouri Headwaters-Madison River Valley-Gallatin Valley- Including the cities of McAllister, Harrison, Whitlash, Ethridge, Zurich, Ennis, Shelby, Santa Rita, Windham, Hobson, Chester, Winston, Hilger, Whitehall, Cameron, Harlem, Geyser, Helena, Moccasin, Three Forks, Fort Benton, Jeffers, White Sulphur Springs, Galata, Norris, Great Falls, Pony, Martinsdale, Benchland, Raynesford, Fort Belknap, Townsend, Checkerboard, Havre, Toston, Stanford, Chinook, Conrad, Devon, Willow Creek, Floweree, Ringling, Ledger, Carter, Rocky Boy, Cut Bank, Lothair, Gallatin Gateway, Brady, Lewistown, Joplin, Bozeman, and Hogeland 1225 PM MDT Mon Oct 12 2026
