An upper trough brought a deep and moist southerly flow to the area. Synoptic lift and jet dynamics affected the western zones first.
Every event with a place to put it; 4 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 BYZ wrote it up.
An upper trough brought a deep and moist southerly flow to the area. Synoptic lift and jet dynamics affected the western zones first. Temperatures were warm enough in the Beartooth Mountains to prevent significant accumulations but warning criteria was still met. Most of the system focused on the far east as a very narrow, stationary, mid level convergent area developed through the day and evening of the 9th.
The national radar mosaic for the moment the first event began.
4 winter storm. Local standard time, as filed.
South Fork Shields Snotel received 12 of snow.
Mystic Lake and Placer Basin Snotels each received 12 inches of snow.
A narrow band of heavy snow producing 5 to 11 inches occurred across portions of Fallon County.
A narrow band of heavy snow producing 5 to 11 inches occurred across portions of Carter County.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2010Every state in 2010This day in weather historyWarnings in Montana, November 2010
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: 264332, 264333, 264334, 264335.