Persistent east winds created continuous drifting of snow across portions of the area during the period. Residents in many areas were not able to travel as road crews were unable to keep up with the drifts.
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 episode as NWS GGW wrote it up.
Persistent east winds created continuous drifting of snow across portions of the area during the period. Residents in many areas were not able to travel as road crews were unable to keep up with the drifts.
The national radar mosaic for the moment the first event began.
2 winter weather. Local standard time, as filed.
Persistant easterly winds and a deep loose snowpack contributed to hazardous road conditions. Road departments suspended plowing operations at times as they could not keep up with the drifting.
Persistant easterly winds and a deep loose snowpack contributed to hazardous road conditions. Road departments suspended plowing operations at times as they could not keep up with the drifting. The Opheim school was hard to remain open during this time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2011Every state in 2011This day in weather historyWarnings in Montana, March 2011
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 2026-09-24. Each event’s entry at NCEI: 287884, 287885.