Flood Watch issued September 7 at 3:59AM MDT until September 8 at 12:00PM MDT by NWS Missoula MT

West Glacier Region; Flathead/Mission Valleys; Potomac/Seeley Lake Region

Urgency: Future

Certainty: Possible

Onset: 9/7/2026, 9:59:00 AM

Expires: 9/8/2026, 12:00:00 PM

Details

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northwest and west central Montana, including the following areas, in northwest Montana, Flathead/Mission Valleys and West Glacier Region. In west central Montana, Potomac/Seeley Lake Region. * WHEN...Through Tuesday morning. * IMPACTS...Excessive runoff may result in flooding of creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Prolonged moderate to heavy rainfall is expected through Tuesday morning with an additional 1 to 2 inches in the valleys, and over 3 inches in the higher terrain, especially along the Continental Divide and in Glacier National Park. - https://www.weather.gov/mso/hydrology

What To Do

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Other Active Flood Watch Alerts

Flood Watch issued September 7 at 3:12AM HST until September 8 at 6:00PM HST by NWS Honolulu HI

Niihau; Kauai Southwest; Kauai Mountains; Kauai North; Kauai East; Kauai South

Flood Watch issued September 7 at 3:12AM HST until September 8 at 6:00PM HST by NWS Honolulu HI

Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; Lanai Mauka; Kahoolawe; Maui Windward West; Maui Leeward West; Haleakala Summit; Kona; Kohala; Big Island Interior; Big Island Summit; East Honolulu; Honolulu Metro; Ewa Plain; Koolau Windward; Koolau Leeward; Molokai Windward; Molokai Southeast; Molokai North; Molokai West; Molokai Leeward South; Lanai Windward; Lanai Leeward; Lanai South; Maui Central Valley North; Maui Central Valley South; Windward Haleakala; Kipahulu; South Maui/Upcountry; South Haleakala; Big Island South; Big Island Southeast; Big Island East; Big Island North

Flood Watch issued September 7 at 6:01AM MDT until September 8 at 12:00PM MDT by NWS Great Falls MT

East Glacier Park Region; Northern High Plains; Eastern Glacier, Western Toole, and Central Pondera; Eastern Toole and Liberty; Southern Rocky Mountain Front; Southern High Plains; Eastern Pondera and Eastern Teton

Flood Watch issued September 6 at 9:51AM MDT until September 8 at 12:00PM MDT by NWS Missoula MT

West Glacier Region; Flathead/Mission Valleys; Potomac/Seeley Lake Region

Source: National Weather Service.