A moist 100 knot southwesterly jet brought moderate snowfall amounts to valley locations of western Montana. Travel became treacherous across area roadways during the event.
Every event with a place to put it; 7 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 moist 100 knot southwesterly jet brought moderate snowfall amounts to valley locations of western Montana. Travel became treacherous across area roadways during the event.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Missoula, MT wrote its last area forecast discussion before the first event at Jan 9, 2:48 PM MST, 11 hours 18 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
6 heavy snow, 1 winter storm. Local standard time, as filed.
A trained spotter at Georgetown Lake reported 6 inches of snow.
A NWS employee located in Lolo reported a storm total snow accumulation of 8 inches. They reported that 6 inches had fallen as of 2100 MST on January 10.
A trained spotter in Anaconda reported a snow storm total of 8.5 inches. They reported that 6.8 inches fell up to 1800MST on January 10.
A NWS employee located one mile southwest of Missoula reported 6.0 inches of snow that mainly fell in 12 hours.
A trained spotter 2 miles southwest of Newcomb reported a snow storm total of 5.3 inches with 1 to 2 foot snow drifts. They reported blowing snow with gusts to 30 mph with visibilities down to one quarter mile.
A trained spotter 5 miles ENE of Sula reported a snow storm total of 12 inches.
A trained spotter in Hamilton reported 6 inches of snow that fell in 4 hours and 50 minutes.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2013Every state in 2013This day in weather historyWarnings in Montana, January 2013
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: 426284, 425925, 426243, 426244, 426249, 426186, 426240.