The first big fall storm moved through the region bringing widespread precipitation and heavy mountain snow. Strong winds developed over the Rocky Mountain Front and in the Cut Bank area as well.
Every event with a place to put it. 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 TFX wrote it up.
The first big fall storm moved through the region bringing widespread precipitation and heavy mountain snow. Strong winds developed over the Rocky Mountain Front and in the Cut Bank area as well. The first wave of precipitation moved into the region Tuesday afternoon becoming steadier by Tuesday evening. A second wave of moisture moved into Southwest Montana on Wednesday morning. Snow levels dropped to valley floors in many Southwest Montana locations. Heavy snow was seen in the mountains, especially above 6000 feet. Southwest flow aloft and a moist, unstable airmass over Southwest Montana resulted in somewhat isolated afternoon and evening convective development that produced some strong outflow winds as well.
The Missoula radar (KMSX), 227 km away, was scanning. The volume nearest the first event began at 00:32 UTC.
11 heavy snow, 2 thunderstorm wind, 1 heavy rain. Local standard time, as filed.
High winds measuring 52KT (60MPH) reported at Dillon Airport ASOS.
Heavy snow measuring 9.0 inches in 24 hours reported at the Badger Pass SNOTEL. Elevation 6900 feet.
High winds measuring 51KT (59MPH) reported at Bozeman Pass.
Storm total rainfall of 1.00 inches reported near Melrose, MT.
Heavy snow measuring 8.0 inches in 12 hours reported at the Darkhorse Lake SNOTEL. Elevation 8701 feet.
Heavy snow measuring 9.0 inches in 24 hours reported at the Mule Creek SNOTEL. Elevation 8300 feet.
Heavy snow measuring 9.0 inches in 12 hours reported at the Rocker Peak SNOTEL. Elevation 8000 feet.
Heavy snow measuring 8.0 inches in 12 hours reported at the Lower Twin SNOTEL. Elevation 7900 feet.
Heavy snow measuring 8.0 inches in 12 hours reported at the Albro Lake SNOTEL. Elevation 8300 feet.
Heavy snow measuring 6.0 inches in 12 hours reported at the Lemhi Ridge SNOTEL. Elevation 8100 feet.
Heavy snow measuring 10.0 inches in 12 hours reported at the Elk Peak SNOTEL. Elevation 7600 feet.
Heavy snow measuring 9.0 inches in 12 hours reported at the Boulder Mountain SNOTEL. Elevation 7950 feet.
Heavy snow measuring 6.0 inches in 12 hours reported at the Frohner Meadow SNOTEL. Elevation 6480 feet.
Heavy snow measuring 8.0 inches in 12 hours, and 11.0 inches in 24 hours, reported at the Badger Pass SNOTEL. Elevation 6900 feet.
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, September 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: 475750, 475752, 475751, 476333, 475753, 475754, 475755, 475756, 475757, 475758, 475759, 475760, 475761, 475764.