1 waterspout, 1 storm surge/tide, as filed by the National Weather Service.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The Missoula radar (KMSX), 68 km away, was scanning. The volume nearest the first event began at 15:27 UTC.
1 waterspout, 1 storm surge/tide. Local standard time, as filed.
Weather spotters on and around Flathead Lake, reported multiple waterspouts on the lake and strong gusty winds.
An arctic front from the north moved over Flathead Lake generating strong gusty winds to 50 mph. Winds over the lake generated waves from 6 to 10 feet high, which damaged docks and piers along the lake shore. Several boats also sank from high waves.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2000Every state in 2000This day in weather historyWarnings in Montana, September 2000The 2000 hurricane season
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 5169708, 5170431.