Flood in Jefferson County, Montana
Flood July 29, 2025 · Jefferson County, Montana
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
Sherriff's office reports substantial standing water on Highway 69 near mile markers 17 and 11, and on Highway 55 near mile marker 8.
The wider storm
A persistent troughing pattern brought in good instability and shear to produce severe thunderstorms across the region over the 3 day time frame with strong winds as the primary hazard. There was also isolated large hail. Anomalously high moisture content and slower moving storms brought localized flooding. A thunderstorm produced heavy rainfall and caused flooding in Havre and in Clear Creek on the 27th. The Havre airport reported 1.72 inches in about 45 minutes, with other reports in town estimated 2.5 of rain quickly. There were also flooding along Highway 69 & 55 in Jefferson County on the 29th.
Began near Piedmont (45.8385, -112.1664).
Source: NOAA Storm Events Database, event 1284375. Narratives are written by the National Weather Service forecast office that issued the report.
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