A slow moving band of precipitation brought heavy snow to parts of southwest Montana above 5500 feet.
Every event with a place to put it; 1 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.
A slow moving band of precipitation brought heavy snow to parts of southwest Montana above 5500 feet.
The national radar mosaic for the moment the first event began.
1 heavy snow. Local standard time, as filed.
Heavy, wet snowfall of up to 12 inches, fell at Georgetown Lake during the morning hours. A few power outages also occurred because of the weight of the snow on powerlines. Higher elevations adjacent to Georgetown Lake reported up to 18 inches of snow.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2020Every state in 2020This day in weather historyWarnings in Montana, May 2020
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: 884040.