A moist westerly flow aloft with embedded surface lows moving across northern Wyoming brought heavy snow to mainly the southeast corner of Montana.
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 BYZ wrote it up.
A moist westerly flow aloft with embedded surface lows moving across northern Wyoming brought heavy snow to mainly the southeast corner of Montana.
The national radar mosaic for the moment the first event began.
3 heavy snow. Local standard time, as filed.
Snowfall of around 12 was reported across the area.
Portions of the county received between 8 and 18 inches of snow along with 28 inch drifts.
Ashland received 6 of snow.
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 2026-09-30. Each event’s entry at NCEI: 302755, 302754, 302756.