An upper level ridge broke down, bringing strong winds aloft. A strong pressure gradient and mountain wave activity helped mix down these strong winds along the Rocky Mountain Front.
Every event with a place to put it; 8 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 TFX wrote it up.
An upper level ridge broke down, bringing strong winds aloft. A strong pressure gradient and mountain wave activity helped mix down these strong winds along the Rocky Mountain Front.
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 Great Falls, MT wrote its last area forecast discussion before the first event at Nov 9, 4:33 PM MST, 9 hours 32 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
8 high wind. Local standard time, as filed.
Mesonet station MTLM8 Mt Lebanon SE had an average high sustained wind of 42 mph between 2:05 and 7:05 MST. They also had a high wind gust of 61 mph.
Mesonet station SNPMT Sunpoint measured a 59 mph wind gust. Mesonet station SRYM8 Saint Mary RAWS also reported a high wind gust.
Mesonet station MTBWG Browning (MT DOT) reported a 87 mph wind gust. It also reported an average sustained wind of 61 mph between 10:15 and 14:30 MST. Mesonet station SHBM Browning, and Mesonet station BGRM8 Browning RAWS also reported high winds gusts. Wetzel NE (Montana Mesonet), Mesonet station MTBRN Two Medicine Bridge (MT DOT), Dupuyer N (MT Mesonet), and Dog Gun Lake (MT Mesonet) also reported both high wind gusts and high sustained winds.
Mission Lake S (MT Meso) measured a 75 mph wind gust and high sustained winds of 49 mph between 11:25 and 14:20 MST. Mesonet Station BUFM8 Buffalo Lake E, ASOS station KCTB Cut Bank Airport, and Ethridge N (Montana Mesonet) also measured high wind gusts and high sustained winds. AWOS station KSBX, and Conrad N (MT Mesonet) also measured high sustained winds. Mesonet station MTSWT Sweetgrass (MT DOT), Mesonet station SBSM8 Sunburst NW, and Mesonet station MTVAR Valier Jct 1-15 measured high wind gusts.
Mesonet station MTGYS Geyser (MT DOT) measured an average sustained wind of 43 mph between 10:30 and 11:45 MST. They also had a high wind gust of 60 mph.
Conrad AWOS measured an average sustained wind of 40 mph between 11:00 and 12:00 MST.
Bynum W (MT Mesonet) measured a 93 mph wind gust and measured an averaged sustained wind of 62 mph between 12:20 and 15:10 MST. Golleham (MT Mesonet), Augusta N (MT Mesonet), and Mesonet station DELMT Dellwo (MCSCN) measured high sustained winds and high wind gusts. Mesonet station DVI01084 Dupuyer, and AWOS station K1FM Foxtrot also measured high wind gusts.
Mesonet station GSNM8 Gleason RAWS measured a 64 mph wind gust.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2025Every state in 2025This day in weather historyWarnings in Montana, November 2025
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: 1298420, 1298368, 1298400, 1298401, 1298496, 1298495, 1298494, 1298421.