An upper-level ridge broke down Thursday and Friday, bringing strong mid-level winds. This combined with a pressure gradient tightening up brought strong winds to the Rocky Mountain front on the 13th.
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 TFX wrote it up.
An upper-level ridge broke down Thursday and Friday, bringing strong mid-level winds. This combined with a pressure gradient tightening up brought strong winds to the Rocky Mountain front on the 13th. These strong winds spilled out further east to the plains along Highway 200 corridor on the 14th.
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 13, 10:34 AM MST, 2 hours 26 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
7 high wind. Local standard time, as filed.
Mesonet station SNPMT Sunpoint measured a 65 mph wind gust.
Mesonet station MTBWG Browning (MT DOT) measured a 89 mph wind gust. They also measured high sustained winds. Montana Mesonet station Wetzel NE also measured high wind gusts and high sustained winds. Mesonet station MTBRN Two Medicine Bridge (MT DOT), Mesonet station SHBM Browning, and GOGM8 Dog Gun Lake Mesonet station also measured high wind gusts.
MT Mesonet SBSM8 Sunburst NW reported a 58 mph wind gust. Mesonet station MTSWT Sweetgrass (MT DOT) also reported a high wind gust.
Mesonet station DELMT Dellwo (MCSCN) measured a 73 mph wind gust. They also measured an average of 50 mph sustained winds from 22:15 and 23:15 MST. Mesonet station MTCTS Choteau South (MT DOT) also measured a high wind gust.
ASOS station KGTF Great Falls Airport reported a 59 mph wind gust.
Mesonet station MTGYS Geyser (MT DOT) averages sustained winds of 45 mph. They also measured a 62 mph wind gust.
ASOS station KLWT Lewistown Airport measured a 58 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: 1298497, 1298498, 1298499, 1298500, 1298501, 1298502, 1298503.