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Home Return to list Dense Fog Advisory 0009 Issued by the Great Falls Forecast Office
Action: New Issued At: 2026-10-31 12:31:19 172 WWUS75 KTFX 311730 NPWTFX URGENT - WEATHER MESSAGE National Weather Service Great Falls MT 1130 AM MDT Sat Oct 31 2026 MTZ302>306-308>314-010830- /O.NEW.KTFX.FG.Y.0009.261101T0300Z-261101T1900Z/ Northern High Plains-Eastern Glacier, Western Toole, and Central Pondera-Eastern Toole and Liberty-Hill County-Northern Blaine County-Southern High Plains-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- Including the cities of Havre, Heart Butte, Joplin, Lothair, Devon, Harlem, Choteau, Carter, Hilger, Dupuyer, Fort Belknap, Floweree, Browning, Chester, Raynesford, Cut Bank, Windham, Stanford, Fort Benton, Brady, Shelby, Lewistown, Pendroy, Rocky Boy, Hogeland, Hobson, Conrad, Zurich, Ethridge, Ledger, Chinook, Great Falls, Geyser, Whitlash, Bynum, Moccasin, Galata, Santa Rita, and Benchland 1130 AM MDT Sat Oct 31 2026 ...DENSE FOG ADVISORY IN EFFECT FROM 9 PM MDT THIS EVENING TO NOON MST SUNDAY... * WHAT...Visibility to as low as one quarter of a mile in dense fog. * WHERE...A portion of north central Montana. * WHEN...From 9 PM MDT this evening to noon MST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Bridge and overpasses could become slippery. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ Moldan Action: Continued Issued At: 2026-11-01 01:57:44 541 WWUS75 KTFX 010657 NPWTFX URGENT - WEATHER MESSAGE National Weather Service Great Falls MT 1257 AM MDT Sun Nov 1 2026 MTZ319-323-324-326-328-011900- /O.EXA.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Helena Valley-Canyon Ferry Area-Missouri Headwaters-Gallatin Valley-Beaverhead and Western Madison below 6000ft- Including the cities of Willow Creek, Bozeman, Helena, Whitehall, Waterloo, Gallatin Gateway, Bannack, Winston, Dillon, Toston, Pony, Harrison, Townsend, Three Forks, and Glen 1257 AM MDT Sun Nov 1 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON MST TODAY... * WHAT...Variable visibility down to one quarter of a mile or less in dense fog. * WHERE...Canyon Ferry Area, Helena Valley, Beaverhead and Western Madison below 6000ft, Gallatin Valley, and Missouri Headwaters. * WHEN...Until noon MST today. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ MTZ302>306-308>314-011900- /O.CON.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Northern High Plains-Eastern Glacier, Western Toole, and Central Pondera-Eastern Toole and Liberty-Hill County-Northern Blaine County-Southern High Plains-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- Including the cities of Fort Benton, Geyser, Chester, Whitlash, Joplin, Raynesford, Chinook, Lewistown, Zurich, Hilger, Great Falls, Bynum, Shelby, Stanford, Ethridge, Browning, Devon, Ledger, Havre, Harlem, Windham, Dupuyer, Hogeland, Galata, Conrad, Fort Belknap, Benchland, Pendroy, Hobson, Moccasin, Brady, Santa Rita, Choteau, Cut Bank, Lothair, Heart Butte, Floweree, Carter, and Rocky Boy 1257 AM MDT Sun Nov 1 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY... * WHAT...Variable visibility down to one quarter of a mile or less in dense fog. * WHERE...A portion of north central Montana. * WHEN...Until noon MST today. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Bridges and overpasses may become slippery from frost deposition and or freezing drizzle, especially for locations west of interstate 15. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ RCG Action: Area Extended Issued At: 2026-11-01 01:57:44 541 WWUS75 KTFX 010657 NPWTFX URGENT - WEATHER MESSAGE National Weather Service Great Falls MT 1257 AM MDT Sun Nov 1 2026 MTZ319-323-324-326-328-011900- /O.EXA.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Helena Valley-Canyon Ferry Area-Missouri Headwaters-Gallatin Valley-Beaverhead and Western Madison below 6000ft- Including the cities of Willow Creek, Bozeman, Helena, Whitehall, Waterloo, Gallatin Gateway, Bannack, Winston, Dillon, Toston, Pony, Harrison, Townsend, Three Forks, and Glen 1257 AM MDT Sun Nov 1 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON MST TODAY... * WHAT...Variable visibility down to one quarter of a mile or less in dense fog. * WHERE...Canyon Ferry Area, Helena Valley, Beaverhead and Western Madison below 6000ft, Gallatin Valley, and Missouri Headwaters. * WHEN...Until noon MST today. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ MTZ302>306-308>314-011900- /O.CON.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Northern High Plains-Eastern Glacier, Western Toole, and Central Pondera-Eastern Toole and Liberty-Hill County-Northern Blaine County-Southern High Plains-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- Including the cities of Fort Benton, Geyser, Chester, Whitlash, Joplin, Raynesford, Chinook, Lewistown, Zurich, Hilger, Great Falls, Bynum, Shelby, Stanford, Ethridge, Browning, Devon, Ledger, Havre, Harlem, Windham, Dupuyer, Hogeland, Galata, Conrad, Fort Belknap, Benchland, Pendroy, Hobson, Moccasin, Brady, Santa Rita, Choteau, Cut Bank, Lothair, Heart Butte, Floweree, Carter, and Rocky Boy 1257 AM MDT Sun Nov 1 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY... * WHAT...Variable visibility down to one quarter of a mile or less in dense fog. * WHERE...A portion of north central Montana. * WHEN...Until noon MST today. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Bridges and overpasses may become slippery from frost deposition and or freezing drizzle, especially for locations west of interstate 15. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ RCG Action: Continued Issued At: 2026-11-01 06:54:09 331 WWUS75 KTFX 011253 NPWTFX URGENT - WEATHER MESSAGE National Weather Service Great Falls MT 553 AM MST Sun Nov 1 2026 MTZ325-011900- /O.EXA.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Madison River Valley- Including the cities of McAllister, Jeffers, Cameron, Ennis, and Norris 553 AM MST Sun Nov 1 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON MST TODAY... * WHAT...Variable visibility down to one quarter of a mile or less in dense fog. * WHERE...Madison River Valley. * WHEN...Until noon MST today. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ MTZ302>306-308>314-011900- /O.CON.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Northern High Plains-Eastern Glacier, Western Toole, and Central Pondera-Eastern Toole and Liberty-Hill County-Northern Blaine County-Southern High Plains-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- Including the cities of Fort Benton, Geyser, Chester, Whitlash, Joplin, Raynesford, Chinook, Lewistown, Zurich, Hilger, Great Falls, Bynum, Shelby, Stanford, Ethridge, Browning, Devon, Ledger, Havre, Harlem, Windham, Dupuyer, Hogeland, Galata, Conrad, Fort Belknap, Benchland, Pendroy, Hobson, Moccasin, Brady, Santa Rita, Choteau, Cut Bank, Lothair, Heart Butte, Floweree, Carter, and Rocky Boy 553 AM MST Sun Nov 1 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY... * WHAT...Variable visibility down to one quarter of a mile or less in dense fog. * WHERE...A portion of north central Montana. * WHEN...Until noon MST today. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Bridges and overpasses may become slippery from frost deposition and or freezing drizzle, especially for locations west of interstate 15. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ MTZ319-323-324-326-328-011900- /O.CON.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Helena Valley-Canyon Ferry Area-Missouri Headwaters-Gallatin Valley-Beaverhead and Western Madison below 6000ft- Including the cities of Willow Creek, Bozeman, Helena, Whitehall, Waterloo, Gallatin Gateway, Bannack, Winston, Dillon, Toston, Pony, Harrison, Townsend, Three Forks, and Glen 553 AM MST Sun Nov 1 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY... * WHAT...Variable visibility down to one quarter of a mile or less in dense fog. * WHERE...Canyon Ferry Area, Helena Valley, Beaverhead and Western Madison below 6000ft, Gallatin Valley, and Missouri Headwaters. * WHEN...Until noon MST today. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ RCG Action: Continued Issued At: 2026-11-01 06:54:09 331 WWUS75 KTFX 011253 NPWTFX URGENT - WEATHER MESSAGE National Weather Service Great Falls MT 553 AM MST Sun Nov 1 2026 MTZ325-011900- /O.EXA.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Madison River Valley- Including the cities of McAllister, Jeffers, Cameron, Ennis, and Norris 553 AM MST Sun Nov 1 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON MST TODAY... * WHAT...Variable visibility down to one quarter of a mile or less in dense fog. * WHERE...Madison River Valley. * WHEN...Until noon MST today. * 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. && $$ MTZ302>306-308>314-011900- /O.CON.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Northern High Plains-Eastern Glacier, Western Toole, and Central Pondera-Eastern Toole and Liberty-Hill County-Northern Blaine County-Southern High Plains-Eastern Pondera and Eastern Teton- Western and Central Chouteau County-Bears Paw Mountains and Southern Blaine-Cascade County below 5000ft-Judith Basin County and Judith Gap-Fergus County below 4500ft- Including the cities of Fort Benton, Geyser, Chester, Whitlash, Joplin, Raynesford, Chinook, Lewistown, Zurich, Hilger, Great Falls, Bynum, Shelby, Stanford, Ethridge, Browning, Devon, Ledger, Havre, Harlem, Windham, Dupuyer, Hogeland, Galata, Conrad, Fort Belknap, Benchland, Pendroy, Hobson, Moccasin, Brady, Santa Rita, Choteau, Cut Bank, Lothair, Heart Butte, Floweree, Carter, and Rocky Boy 553 AM MST Sun Nov 1 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY... * WHAT...Variable visibility down to one quarter of a mile or less in dense fog. * WHERE...A portion of north central Montana. * WHEN...Until noon MST today. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Bridges and overpasses may become slippery from frost deposition and or freezing drizzle, especially for locations west of interstate 15. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ MTZ319-323-324-326-328-011900- /O.CON.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Helena Valley-Canyon Ferry Area-Missouri Headwaters-Gallatin Valley-Beaverhead and Western Madison below 6000ft- Including the cities of Willow Creek, Bozeman, Helena, Whitehall, Waterloo, Gallatin Gateway, Bannack, Winston, Dillon, Toston, Pony, Harrison, Townsend, Three Forks, and Glen 553 AM MST Sun Nov 1 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY... * WHAT...Variable visibility down to one quarter of a mile or less in dense fog. * WHERE...Canyon Ferry Area, Helena Valley, Beaverhead and Western Madison below 6000ft, Gallatin Valley, and Missouri Headwaters. * WHEN...Until noon MST today. * 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. && $$ RCG Action: Area Extended Issued At: 2026-11-01 06:54:09 331 WWUS75 KTFX 011253 NPWTFX URGENT - WEATHER MESSAGE National Weather Service Great Falls MT 553 AM MST Sun Nov 1 2026 MTZ325-011900- /O.EXA.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Madison River Valley- Including the cities of McAllister, Jeffers, Cameron, Ennis, and Norris 553 AM MST Sun Nov 1 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON MST TODAY... * WHAT...Variable visibility down to one quarter of a mile or less in dense fog. * WHERE...Madison River Valley. * WHEN...Until noon MST today. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ MTZ302>306-308>314-011900- /O.CON.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Northern High Plains-Eastern Glacier, Western Toole, and Central Pondera-Eastern Toole and Liberty-Hill County-Northern Blaine County-Southern High Plains-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- Including the cities of Fort Benton, Geyser, Chester, Whitlash, Joplin, Raynesford, Chinook, Lewistown, Zurich, Hilger, Great Falls, Bynum, Shelby, Stanford, Ethridge, Browning, Devon, Ledger, Havre, Harlem, Windham, Dupuyer, Hogeland, Galata, Conrad, Fort Belknap, Benchland, Pendroy, Hobson, Moccasin, Brady, Santa Rita, Choteau, Cut Bank, Lothair, Heart Butte, Floweree, Carter, and Rocky Boy 553 AM MST Sun Nov 1 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY... * WHAT...Variable visibility down to one quarter of a mile or less in dense fog. * WHERE...A portion of north central Montana. * WHEN...Until noon MST today. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Bridges and overpasses may become slippery from frost deposition and or freezing drizzle, especially for locations west of interstate 15. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ MTZ319-323-324-326-328-011900- /O.CON.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Helena Valley-Canyon Ferry Area-Missouri Headwaters-Gallatin Valley-Beaverhead and Western Madison below 6000ft- Including the cities of Willow Creek, Bozeman, Helena, Whitehall, Waterloo, Gallatin Gateway, Bannack, Winston, Dillon, Toston, Pony, Harrison, Townsend, Three Forks, and Glen 553 AM MST Sun Nov 1 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY... * WHAT...Variable visibility down to one quarter of a mile or less in dense fog. * WHERE...Canyon Ferry Area, Helena Valley, Beaverhead and Western Madison below 6000ft, Gallatin Valley, and Missouri Headwaters. * WHEN...Until noon MST today. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ RCG Action: Expired Issued At: 2026-11-01 13:22:50 706 WWUS75 KTFX 011922 NPWTFX URGENT - WEATHER MESSAGE National Weather Service Great Falls MT 1222 PM MST Sun Nov 1 2026 MTZ302>306-308>314-319-323>326-328-012030- /O.EXP.KTFX.FG.Y.0009.000000T0000Z-261101T1900Z/ Northern High Plains-Eastern Glacier, Western Toole, and Central Pondera-Eastern Toole and Liberty-Hill County-Northern Blaine County-Southern High Plains-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-Canyon Ferry Area-Missouri Headwaters-Madison River Valley-Gallatin Valley-Beaverhead and Western Madison below 6000ft- Including the cities of Raynesford, Dillon, Fort Benton, Geyser, Choteau, Stanford, Conrad, Benchland, Toston, Norris, Shelby, Bozeman, Brady, Cut Bank, Moccasin, Carter, Great Falls, Ennis, Lothair, Townsend, Helena, Zurich, Ethridge, Chester, Galata, Bynum, Rocky Boy, Hobson, Ledger, Windham, Willow Creek, Joplin, Havre, Winston, Whitehall, Jeffers, Bannack, Hilger, Whitlash, Fort Belknap, Lewistown, Devon, Chinook, Pony, Harrison, Floweree, Glen, Gallatin Gateway, Harlem, Cameron, Dupuyer, Waterloo, Browning, Pendroy, McAllister, Heart Butte, Three Forks, Santa Rita, and Hogeland 1222 PM MST Sun Nov 1 2026 ...DENSE FOG ADVISORY HAS EXPIRED... Visibility has improved and the Dense Fog Advisory has ended. Areas of fog and mist continue across the area however and some locally reduced visibility is still possible. $$ BH | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||