Anomalously high precipitable water (200-210% of normal) along with a shortwave trough, resulted in high rainfall rates with convection. The Weather Prediction Center issued a slight risk for excessive rainfall rates.
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 MSO wrote it up.
Anomalously high precipitable water (200-210% of normal) along with a shortwave trough, resulted in high rainfall rates with convection. The Weather Prediction Center issued a slight risk for excessive rainfall rates.
The national radar mosaic for the moment the first event began.
1 heavy rain, 1 debris flow. Local standard time, as filed.
Flooding was reported on the Highline Trail. People needed to be rescued, but ongoing thunderstorms prevented helicopter operations.
Multiple debris flows blocked Skalkaho Highway (Highway 38) in three locations. Two slides occurred south of Skalkaho Falls, with an additional flow reported west of the winter gate.
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, August 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: 1287159, 1282038.