Heavy Snow — Lower Clark Fork Region, Montana

2025-03-21 to 2025-03-22 · Lower Clark Fork Region, Montana

Event narrative

Periods of heavy snow fell at and around Lookout Pass in the mid-afternoon on the 21st, causing a full full blockage of Interstate 90 due to accidents and stuck vehicles. Periodic road closures continued through the morning of the 22nd with reports of 9 to 10 hours wait times for motorists attempting to cross Lookout Pass. The Lookout Ski resort reported 10 to 16 inches of snow over the 24-hour period ending on the morning of the 22nd.

Wider weather episode

Strong Pacific cold front with moisture surge led to periods of heavy mountain snow along the Idaho-Montana border.

Source: NOAA Storm Events Database, event_id 1235372. Narrative written by the NWS forecast office that issued the report.