Weather Warnings for Montana

Issued by the National Weather Service

Current watches, warnings, and advisories for Montana
Alerts Updated: May 16, 2026, 6:02 am  UTC


Winter Weather Advisory issued May 15 at 11:00PM MDT until May 17 at 6:00AM MDT by NWS Great Falls MT

Summary: * WHAT...Snow expected. Total snow accumulations 3 to 7 inches, with higher amounts on high peaks. Winds gusting as high as 40 mph. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From 5 PM Saturday to 6 AM MDT Sunday. * IMPACTS...Plan on slippery and slushy road conditions and raw back country conditions Saturday evening into Sunday. * ADDITIONAL DETAILS...Snow levels quickly fall Saturday evening after a round of showers and perhaps a couple thunderstorms Saturday afternoon. Those with back country plans should be aware of the forecast raw conditions.
Severity:  Moderate    Effective:  May 15, 2026, 11:00 pm      Expires:  May 16, 2026, 2:00 pm
Area:  Gallatin and Madison County Mountains and Centennial Mountains


Winter Weather Advisory issued May 15 at 11:00PM MDT until May 18 at 12:00AM MDT by NWS Great Falls MT

Summary: * WHAT...Snow expected. Total snow accumulations between 3 and 8 inches, with isolated amounts up to 12 inches in the northern slopes of the Little Belt Mountains. Winds gusting as high as 40 mph. * WHERE...Big Belt, Bridger and Castle Mountains and Little Belt and Highwood Mountains. * WHEN...From midnight Saturday Night to midnight MDT Sunday Night. * IMPACTS...Plan on slippery backcountry road conditions. Wet and raw conditions may create hypothermia risk for those recreating in the backcountry.
Severity:  Moderate    Effective:  May 15, 2026, 11:00 pm      Expires:  May 16, 2026, 2:00 pm
Area:  Little Belt and Highwood Mountains; Big Belt, Bridger and Castle Mountains


Winter Weather Advisory issued May 15 at 11:00PM MDT until May 18 at 12:00AM MDT by NWS Great Falls MT

Summary: * WHAT...Snow expected. Total snow accumulations between 2 and 6 inches over most mountain passes, with up to 12 inches over the highest peaks. Winds gusting as high as 40 mph. * WHERE...The Continental Divide along the Rocky Mountain Front, Upper Blackfoot and MacDonald Pass, and Elkhorn and Boulder Mountains. * WHEN...From midnight Saturday Night to midnight MDT Sunday Night. * IMPACTS...Plan on slippery backcountry road conditions. Wet and raw conditions may create hypothermia risk for those recreating in the backcountry.
Severity:  Moderate    Effective:  May 15, 2026, 11:00 pm      Expires:  May 16, 2026, 2:00 pm
Area:  East Glacier Park Region; Southern Rocky Mountain Front; Upper Blackfoot and MacDonald Pass; Elkhorn and Boulder Mountains


Winter Weather Advisory issued May 15 at 11:38AM MDT until May 18 at 12:00AM MDT by NWS Missoula MT

Summary: * WHAT...Snow expected. Total snow accumulations of 2 to 6 inches in the mountain terrain above 5000 feet. Slushy accumulations possible for Lost Trail, Homestake and MacDonald Passes and around Georgetown Lake. Winds gusting as high as 35 mph. * WHERE...Homestake Pass, Lolo Pass, Georgetown Lake, MacDonald Pass, Highway 93 Sula to Lost Trail Pass, and Butte. * WHEN...From midnight Saturday Night to midnight MDT Sunday Night. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry.
Severity:  Moderate    Effective:  May 15, 2026, 11:38 am      Expires:  May 18, 2026, 12:00 am
Area:  Bitterroot/Sapphire Mountains; Butte/Blackfoot Region


Winter Weather Advisory issued May 15 at 11:38AM MDT until May 18 at 12:00AM MDT by NWS Missoula MT

Summary: * WHAT...Snow expected. Total snow accumulations of 2 to 6 inches in the mountain terrain above 5000 feet. Slushy accumulations possible on Marias Pass. * WHERE...The higher terrain of Glacier National Park. * WHEN...From midnight Saturday Night to midnight MDT Sunday Night. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry.
Severity:  Moderate    Effective:  May 15, 2026, 11:38 am      Expires:  May 18, 2026, 12:00 am
Area:  West Glacier Region; Potomac/Seeley Lake Region