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Flash Flood — Fremont, WY

Aug 27, 2025

Flood Cause
Heavy Rain

A significant push of monsoonal moisture brought rainfall to much of Wyoming on 8/27/25. Thunderstorms with high rainfall rates near Jeffrey City led to flash flooding for portions of the town. The public reported ponding water in low spots throughout Jeffrey City. Radar estimates showed 1.0 to 1.5 inches of rain falling on the town of Jeffrey City within a 1 hour period, with up to 2 inches falling west of town. Rainfall rates were estimated to be as high as 6 inches per hour.

Source: NOAA National Weather Service Storm Events Database (event 1293149). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Fremont, WY

This event is one of many recorded floods in Fremont County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Fremont County flood data →

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