An upper-level trough produced afternoon showers and thunderstorms. A weak CAPE profile kept the severe thunderstorm risk on the low end.
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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 TFX wrote it up.
An upper-level trough produced afternoon showers and thunderstorms. A weak CAPE profile kept the severe thunderstorm risk on the low end. However, with the upper-level low overhead with embedded mini vorticity maximums, a brief landspout was able to form.
The Billings radar (KBLX), 136 km away, was scanning. The volume nearest the first event began at 20:23 UTC.
1 thunderstorm wind. Local standard time, as filed.
Report via media: Funnel cloud was observed picking up dust for about 45 seconds and believed to have touched the ground. Location was about 6 mi south of Buffalo and 2 mi west of Garneill. No damages were reported with the landspout.
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, September 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 2026-09-30. Each event’s entry at NCEI: 1287771.