Weather Warnings for Montana

Issued by the National Weather Service

Current watches, warnings, and advisories for Montana
Alerts Updated: July 31, 2026, 9:34 pm  UTC


Red Flag Warning issued July 31 at 1:23PM MDT until August 2 at 9:00PM MDT by NWS Billings MT

Summary: The National Weather Service in Billings has issued a Red Flag Warning...which is in effect from midnight Saturday night to 9 PM MDT Sunday. * IMPACTS: Low humidities, hot temperatures, and gusty winds associated with a cold front will create erratic fire behavior. * AFFECTED AREA: In North Central WY Fire Zones...274...284. In South Central MT Fire Zone...129. In Southeast MT Fire Zones...130...131...132. * COUNTIES AFFECTED: In North Central WY...Big Horn...Johnson...Sheridan...Washakie. In South Central MT...Big Horn...Carbon...Yellowstone. In Southeast MT...Custer...Powder River...Rosebud...Treasure. * COLD FRONT: A cold front moves through Saturday night bringing increased winds. * WIND: South winds early Sunday switching to the north 10 to 20 mph with gusts up to 35 mph. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Up to 100 degrees.
Severity:  Severe    Effective:  July 31, 2026, 1:23 pm      Expires:  August 1, 2026, 1:30 pm
Area:  Crow Indian Reservation/Big Horn Canyon Rec Area; Northern Rosebud/Northern Treasure Counties; Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Custer County; Sheridan County/Casper BLM; Bighorn National Forest


Red Flag Warning issued July 31 at 1:23PM MDT until August 2 at 9:00PM MDT by NWS Billings MT

Summary: The National Weather Service in Billings has issued a Red Flag Warning...which is in effect from 2 PM Saturday to 9 PM MDT Sunday. * IMPACTS: Low humidities, hot temperatures, and gusty winds associated with a cold front will create erratic fire behavior. * AFFECTED AREA: In South Central MT Fire Zones...123...124...125...126...127 128. * COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In South Central MT...Carbon...Park...Stillwater...Sweet Grass Yellowstone. In Southwest MT...Gallatin. * WIND: Southwest 10 to 20 mph with gusts up to 35 mph. * HUMIDITY: As low as 10 percent Saturday, as low as 11 percent Sunday. * TEMPERATURES: Up to 105 degrees Saturday, up to 100 degrees Sunday. * COLD FRONT: A cold front moves through Saturday night bringing increased winds.
Severity:  Severe    Effective:  July 31, 2026, 1:23 pm      Expires:  August 1, 2026, 1:30 pm
Area:  Gallatin National Forest; Wheatland County/Sweet Grass County; Stillwater County; Beartooth Ranger District Custer National Forest; Golden Valley County/Musselshell County; Yellowstone County


The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation.

Summary: The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation.
Severity:  Severe    Effective:  July 31, 2026, 1:11 pm      Expires:  July 31, 2026, 1:26 pm
Area:  Kootenai National Forest/Talley Lake District/fnf; Flathead National Forest/Glacier Park/Bob Marshall And Mission Mountain Wilderness; Western Lolo National Forest; Salish and Kootenai Indian Reservation; Eastern Lolo National Forest/Welcome Creek And Scapegoat Wildernesses; Bitterroot National Forest


Red Flag Warning issued July 31 at 1:11PM MDT until August 2 at 9:00PM MDT by NWS Missoula MT

Summary: ...FIRE WEATHER WATCH IS CANCELLED FOR CLEARWATER/NEZ PERCE... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM PDT SATURDAY DUE TO WIND SHIFT, MOISTURE DROP AND WIND, LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS CANYON... ...RED FLAG WARNING IN EFFECT FROM 2 PM SATURDAY TO MIDNIGHT MDT SATURDAY NIGHT DUE TO WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF MT... ...RED FLAG WARNING IN EFFECT FROM 2 PM SATURDAY TO 9 PM MDT SUNDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND EAST BEAVERHEAD... ... .A ridge breakdown and dry frontal passage will bring critical fire weather to the region. The National Weather Service in Missoula MT has issued a Red Flag Warning in effect from 2 PM Saturday to 9 PM MDT Sunday. * AFFECTED AREA...Fire Weather Zones 110 and 111. * TIMING...From 2 PM Saturday to 9 PM MDT Sunday. * WINDS...West winds 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...Relative Humidity between 8 to 20 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended.
Severity:  Severe    Effective:  July 31, 2026, 1:11 pm      Expires:  July 31, 2026, 9:15 pm
Area:  Deerlodge/Western Beaverhead National Forest; Eastern Beaverhead National Forest


The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation.

Summary: The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation.
Severity:  Severe    Effective:  July 31, 2026, 1:11 pm      Expires:  July 31, 2026, 1:26 pm
Area:  Deerlodge/Western Beaverhead National Forest; Eastern Beaverhead National Forest


Red Flag Warning issued July 31 at 1:11PM MDT until August 2 at 12:00AM MDT by NWS Missoula MT

Summary: ...FIRE WEATHER WATCH IS CANCELLED FOR CLEARWATER/NEZ PERCE... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM PDT SATURDAY DUE TO WIND SHIFT, MOISTURE DROP AND WIND, LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS CANYON... ...RED FLAG WARNING IN EFFECT FROM 2 PM SATURDAY TO MIDNIGHT MDT SATURDAY NIGHT DUE TO WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF MT... ...RED FLAG WARNING IN EFFECT FROM 2 PM SATURDAY TO 9 PM MDT SUNDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND EAST BEAVERHEAD... ... .A ridge breakdown and dry frontal passage will bring critical fire weather to the region. The National Weather Service in Missoula MT has issued a Red Flag Warning in effect from 2 PM Saturday to midnight MDT Saturday Night. * AFFECTED AREA...A portion of MT. * TIMING...From 2 PM Saturday to midnight MDT Saturday Night. * WINDS...West winds 15 to 25 mph with gusts up to 40 mph and isolated gusts up to 50 mph in higher terrain especially along the Continental Divide. * RELATIVE HUMIDITY...Relative Humidity between 9 to 20 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended.
Severity:  Severe    Effective:  July 31, 2026, 1:11 pm      Expires:  July 31, 2026, 9:15 pm
Area:  Kootenai National Forest/Talley Lake District/fnf; Flathead National Forest/Glacier Park/Bob Marshall And Mission Mountain Wilderness; Western Lolo National Forest; Salish and Kootenai Indian Reservation; Eastern Lolo National Forest/Welcome Creek And Scapegoat Wildernesses; Bitterroot National Forest


Extreme Heat Warning issued July 31 at 12:29PM MDT until August 2 at 12:00AM MDT by NWS Billings MT

Summary: * WHAT...Dangerously hot conditions with high temperatures of 100 to 108 expected. * WHERE...Portions of central, south central, and southeast Montana and north central Wyoming. * WHEN...From noon Saturday to midnight MDT Saturday Night. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Low temperatures are expected to be in the 70s for some locations east of Billings Saturday night bringing limited overnight relief.
Severity:  Severe    Effective:  July 31, 2026, 12:29 pm      Expires:  August 1, 2026, 12:30 pm
Area:  Musselshell; Treasure; Northern Rosebud; Custer; Fallon; Northern Stillwater; Powder River; Carter; Northern Park; Golden Valley; Red Lodge Foothills; Northern Big Horn; Southern Rosebud; Judith Gap; Paradise Valley; Livingston Area; Beartooth Foothills; Southern Big Horn; Southeastern Carbon; Northern Sweet Grass; Bighorn Canyon; Northern Carbon; Melville Foothills; Northeastern Yellowstone; Southern Wheatland; Southwestern Yellowstone; Sheridan Foothills


Heat Advisory issued July 31 at 12:06PM MDT until August 2 at 3:00AM MDT by NWS Great Falls MT

Summary: * WHAT...High temperatures up to 102 degrees expected. * WHERE...Portions of central, north central, and southwest Montana. * WHEN...From noon Saturday to 3 AM MDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses.
Severity:  Moderate    Effective:  July 31, 2026, 12:06 pm      Expires:  August 1, 2026, 6:15 am
Area:  Eastern Toole and Liberty; Hill County; Northern Blaine County; Gates of the Mountains; Snowy and Judith Mountains; Helena Valley; Meagher County Valleys; Elkhorn and Boulder Mountains; Canyon Ferry Area; Missouri Headwaters; Beaverhead and Western Madison below 6000ft


Extreme Heat Warning issued July 31 at 12:06PM MDT until August 2 at 12:00PM MDT by NWS Great Falls MT

Summary: * WHAT...Dangerously hot conditions. High temperatures on Saturday between 100 to 110 degrees, with overnight lows Saturday night between 70 to 75 degrees. * WHERE...Bears Paw Mountains and Southern Blaine, Fergus County below 4500ft, and Western and Central Chouteau County. * WHEN...From noon Saturday to noon MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat.
Severity:  Severe    Effective:  July 31, 2026, 12:06 pm      Expires:  August 1, 2026, 6:15 am
Area:  Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Fergus County below 4500ft


High Wind Warning issued July 31 at 12:06PM MDT until August 2 at 12:00PM MDT by NWS Great Falls MT

Summary: * WHAT...For the Heat Advisory, high temperatures up to 102 degrees expected. For the High Wind Warning, west winds 30 to 40 mph, with gusts up to 60 mph. Isolated wind gusts up to 75 mph along the immediate eastern slopes of the Rocky Mountain Front. * WHERE...Eastern Glacier, Western Toole, and Central Pondera. * WHEN...For the Heat Advisory, from noon Saturday to 3 AM MDT Sunday. For the High Wind Warning, from 6 PM Saturday to noon MDT Sunday. * IMPACTS...Damaging winds will blow down trees and power lines. Travel could be difficult, especially for high profile vehicles. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...The most intense winds are likely to occur between 12 AM and 8 AM Sunday when mountain wave activity will be at its peak.
Severity:  Severe    Effective:  July 31, 2026, 12:06 pm      Expires:  August 1, 2026, 6:15 am
Area:  Eastern Glacier, Western Toole, and Central Pondera


High Wind Warning issued July 31 at 12:06PM MDT until August 2 at 12:00PM MDT by NWS Great Falls MT

Summary: * WHAT...West winds 30 to 40 mph, with gusts up to 60 mph possible. Isolated wind gusts up to 75 mph along the immediate eastern slopes of the Rocky Mountain Front. * WHERE...East Glacier Park Region Zone, and Northern High Plains. * WHEN...From 6 PM Saturday to noon MDT Sunday. * IMPACTS...Damaging winds will blow down trees and power lines. Travel could be difficult, especially for high profile vehicles. Recreationists should be aware of any trees that could fall while establishing camps or hiking. * ADDITIONAL DETAILS...The most intense winds are likely to occur between 12 AM and 8 AM Sunday when mountain wave activity will be at its peak.
Severity:  Severe    Effective:  July 31, 2026, 12:06 pm      Expires:  August 1, 2026, 6:15 am
Area:  East Glacier Park Region; Northern High Plains


Heat Advisory issued July 31 at 12:06PM MDT until August 2 at 3:00AM MDT by NWS Great Falls MT

Summary: * WHAT...High temperatures up to 102 degrees expected. * WHERE...Eastern Pondera and Eastern Teton. * WHEN...From noon Saturday to 3 AM MDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses.
Severity:  Moderate    Effective:  July 31, 2026, 12:06 pm      Expires:  August 1, 2026, 6:15 am
Area:  Eastern Pondera and Eastern Teton


Extreme Heat Warning issued July 31 at 12:06PM MDT until August 2 at 3:00AM MDT by NWS Great Falls MT

Summary: * WHAT...Dangerously hot conditions. High temperatures between 100 and 105 degrees expected. * WHERE...Gallatin Valley and Madison River Valley. * WHEN...From noon Saturday to 3 AM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
Severity:  Severe    Effective:  July 31, 2026, 12:06 pm      Expires:  August 1, 2026, 6:15 am
Area:  Madison River Valley; Gallatin Valley


Extreme Heat Warning issued July 31 at 12:06PM MDT until August 2 at 3:00AM MDT by NWS Great Falls MT

Summary: * WHAT...Dangerously hot conditions. High temperatures between 100 and 105 degrees expected. * WHERE...Cascade County below 5000ft and Judith Basin County and Judith Gap. * WHEN...From noon Saturday to 3 AM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat.
Severity:  Severe    Effective:  July 31, 2026, 12:06 pm      Expires:  August 1, 2026, 6:15 am
Area:  Cascade County below 5000ft; Judith Basin County and Judith Gap


Heat Advisory issued July 31 at 12:06PM MDT until August 2 at 3:00AM MDT by NWS Great Falls MT

Summary: * WHAT...For the Heat Advisory, high temperatures up to 102 degrees expected. For the High Wind Warning, west winds 30 to 40 mph, with gusts up to 60 mph. Isolated wind gusts up to 75 mph along the immediate eastern slopes of the Rocky Mountain Front. * WHERE...Eastern Glacier, Western Toole, and Central Pondera. * WHEN...For the Heat Advisory, from noon Saturday to 3 AM MDT Sunday. For the High Wind Warning, from 6 PM Saturday to noon MDT Sunday. * IMPACTS...Damaging winds will blow down trees and power lines. Travel could be difficult, especially for high profile vehicles. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...The most intense winds are likely to occur between 12 AM and 8 AM Sunday when mountain wave activity will be at its peak.
Severity:  Moderate    Effective:  July 31, 2026, 12:06 pm      Expires:  August 1, 2026, 6:15 am
Area:  Eastern Glacier, Western Toole, and Central Pondera


Red Flag Warning issued July 31 at 11:44AM MDT until August 2 at 9:00PM MDT by NWS Great Falls MT

Summary: The National Weather Service in Great Falls has issued a Red Flag Warning for hot temperatures, gusty winds, and low relative humidity, which is in effect from 2 PM Saturday to 9PM MDT Sunday. * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Hill and Blaine Counties, Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front, Chouteau and Fergus Counties, Lincoln Ranger District of the Helena National Forest, Central and Eastern Lewis and Clark National Forest Areas and Helena and Townsend Ranger Districts of the Helena National Forest. * WINDS...West 15 to 25 mph with gusts up to 50 mph. Along the Rocky Mountain Front, west winds 30 to 40 mph with gusts up to 60 mph and isolated cases of 75 mph. * RELATIVE HUMIDITY...As low as 8 percent. * TEMPERATURES...Between 100 and 110 degrees on Saturday. * COLD FRONT...A strong, dry cold front will arrive Saturday evening. * IMPACTS...Any fires that develop will spread rapidly. Containment of any ongoing or new fires may be very difficult. Outdoor burning is not recommended.
Severity:  Severe    Effective:  July 31, 2026, 11:44 am      Expires:  August 1, 2026, 2:45 am
Area:  Eastern Glacier/Toole/Central/Eastern Pondera/Liberty; Hill and Blaine Counties; Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front; Chouteau and Fergus Counties; Lincoln Ranger District of the Helena National Forest; Central and Eastern Lewis and Clark National Forest Areas; Helena and Townsend Ranger Districts of the Helena National Forest


Red Flag Warning issued July 31 at 11:34AM MDT until August 2 at 9:00PM MDT by NWS Glasgow MT

Summary: ...CRITICAL FIRE WEATHER CONCERNS THIS WEEKEND... The National Weather Service in Glasgow has issued a Red Flag Warning, which is in effect from 2 PM Saturday to 9 PM MDT Sunday. The Fire Weather Watch is no longer in effect. * WIND...Southeast winds on Saturday turning to Northwest Sunday with speeds at 15-25 mph with gusts to 35 mph. * HUMIDITY...8-20%, 20-35% Fire Weather Zone 120. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended.
Severity:  Severe    Effective:  July 31, 2026, 11:34 am      Expires:  July 31, 2026, 7:45 pm
Area:  Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties; Dawson/McCone/Prairie/Richland/Wibaux Counties; Northern Valley and Northern Phillips Counties; The Little Rockies; The Lower Missouri River Breaks including the Charles M Russell National Wildlife Refuge; Southern Petroleum and Southern Garfield Counties


Lake Wind Advisory issued July 31 at 11:20AM MDT until August 2 at 6:00PM MDT by NWS Glasgow MT

Summary: * WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 108 expected. For the Lake Wind Advisory, west winds 15 to 25 mph with gusts up to 35 mph expected. * WHERE...For the Extreme Heat Warning, Central and Southeast Phillips, Central and Southern Valley, Garfield, and Petroleum Counties. For the Lake Wind Advisory, Fort Peck Lake. * WHEN...For the Extreme Heat Warning, from noon Saturday to noon MDT Sunday. For the Lake Wind Advisory, from 6 PM Saturday to 6 PM MDT Sunday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Heat related illnesses increase significantly during extreme heat and high humidity events.
Severity:  Moderate    Effective:  July 31, 2026, 11:20 am      Expires:  August 1, 2026, 3:15 am
Area:  Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield


Lake Wind Advisory issued July 31 at 11:20AM MDT until August 2 at 6:00PM MDT by NWS Glasgow MT

Summary: * WHAT...For the Extreme Heat Warning, dangerously hot conditions with temperatures up to 104 expected. For the Lake Wind Advisory, west winds 15 to 25 mph with gusts up to 30 mph expected. * WHERE...For the Extreme Heat Warning, McCone County. For the Lake Wind Advisory, Fort Peck Lake. * WHEN...For the Extreme Heat Warning, from noon Saturday to 6 PM MDT Sunday. For the Lake Wind Advisory, from 6 PM Saturday to 6 PM MDT Sunday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Heat related illnesses increase significantly during extreme heat and high humidity events.
Severity:  Moderate    Effective:  July 31, 2026, 11:20 am      Expires:  August 1, 2026, 3:15 am
Area:  McCone


Extreme Heat Warning issued July 31 at 11:20AM MDT until August 2 at 6:00PM MDT by NWS Glasgow MT

Summary: * WHAT...For the Extreme Heat Warning, dangerously hot conditions with temperatures up to 104 expected. For the Lake Wind Advisory, west winds 15 to 25 mph with gusts up to 30 mph expected. * WHERE...For the Extreme Heat Warning, McCone County. For the Lake Wind Advisory, Fort Peck Lake. * WHEN...For the Extreme Heat Warning, from noon Saturday to 6 PM MDT Sunday. For the Lake Wind Advisory, from 6 PM Saturday to 6 PM MDT Sunday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Heat related illnesses increase significantly during extreme heat and high humidity events.
Severity:  Severe    Effective:  July 31, 2026, 11:20 am      Expires:  August 1, 2026, 3:15 am
Area:  McCone


Extreme Heat Warning issued July 31 at 11:20AM MDT until August 2 at 6:00PM MDT by NWS Glasgow MT

Summary: * WHAT...Dangerously hot conditions with temperatures up to 104 expected. * WHERE...Daniels, Dawson, Roosevelt, Prairie, Richland, Sheridan, and Wibaux Counties. * WHEN...From noon Saturday to 6 PM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
Severity:  Severe    Effective:  July 31, 2026, 11:20 am      Expires:  August 1, 2026, 3:15 am
Area:  Daniels; Sheridan; Western Roosevelt; Richland; Dawson; Prairie; Wibaux; Eastern Roosevelt


Extreme Heat Warning issued July 31 at 11:20AM MDT until August 2 at 12:00PM MDT by NWS Glasgow MT

Summary: * WHAT...Dangerously hot conditions with temperatures up to 108 expected. * WHERE...Northern Phillips, Northern Valley, and Southwest Phillips Counties. * WHEN...From noon Saturday to noon MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
Severity:  Severe    Effective:  July 31, 2026, 11:20 am      Expires:  August 1, 2026, 3:15 am
Area:  Northern Phillips; Southwest Phillips; Northern Valley


Extreme Heat Warning issued July 31 at 11:20AM MDT until August 2 at 12:00PM MDT by NWS Glasgow MT

Summary: * WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 108 expected. For the Lake Wind Advisory, west winds 15 to 25 mph with gusts up to 35 mph expected. * WHERE...For the Extreme Heat Warning, Central and Southeast Phillips, Central and Southern Valley, Garfield, and Petroleum Counties. For the Lake Wind Advisory, Fort Peck Lake. * WHEN...For the Extreme Heat Warning, from noon Saturday to noon MDT Sunday. For the Lake Wind Advisory, from 6 PM Saturday to 6 PM MDT Sunday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Heat related illnesses increase significantly during extreme heat and high humidity events.
Severity:  Severe    Effective:  July 31, 2026, 11:20 am      Expires:  August 1, 2026, 3:15 am
Area:  Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield