On December 19 and 20, a strong disturbance moved east across Western Montana. Snowfall amounts were enhanced by a strong and moist westerly flow that was already entrenched over the region.
Every event with a place to put it; 3 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 episode as NWS MSO wrote it up.
On December 19 and 20, a strong disturbance moved east across Western Montana. Snowfall amounts were enhanced by a strong and moist westerly flow that was already entrenched over the region.
The national radar mosaic for the moment the first event began.
3 heavy snow. Local standard time, as filed.
The Interstate 90 corridor near Lookout Pass received 13 inches of new snowfall and Mullan Pass 15 inches.
Lolo Pass received 13 inches and Lost Trail Pass 8 inches of new snowfall.
The Highway 2 corridor between Essex and Marias Pass received between 8 and 13 inches of new snowfall.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2007Every state in 2007This day in weather historyWarnings in Montana, December 2007
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: 65302, 65303, 65301.