An arctic airmass combined with east winds of 10 to 20 mph created bitter cold wind chills across the area with wind chill readings of 40 to 45 below zero.
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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.
An arctic airmass combined with east winds of 10 to 20 mph created bitter cold wind chills across the area with wind chill readings of 40 to 45 below zero.
The national radar mosaic for the moment the first event began.
2 cold/wind chill. Local standard time, as filed.
Windchills of 40 to 45 below were observed. The Glasgow Airport reported the lowest reading.
Steady winds near 10 mph produced wind chills of 40 below at Cow Creek DOT.
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, January 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: 206596, 206599.