Severe · Flood WatchActive alert

Flood Watch issued September 20 at 12:49PM MDT until September 20 at

Affecting Bighorn Mountains West; Bighorn Mountains Southeast; Northeast Johnson County; Southeast Johnson County

In effect until: Sep 21, 2026, 12:00 AM

Bighorn Mountains West; Bighorn Mountains Southeast; Northeast Johnson County; Southeast Johnson County

Possible impact zone; conditions develop through 12:00 AM.

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

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Read the original bulletin (official text)

* WHAT...Flash flooding caused by moderate to heavy rainfall is
possible, especially in terrain and poor drainage areas.

* WHERE...A portion of north central Wyoming, including the Bighorn
Mountains and Johnson County.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Heavy rainfall may result in flooding of rivers, creeks,
streams, and other low-lying and flood-prone locations. Flooding
may occur in poor drainage and urban areas and around steep
terrain.

* ADDITIONAL DETAILS...
- As a weather system shifts into the High Plains, lingering
moisture will allow for showers and thunderstorms to be capable
of moderate to heavy rainfall across the Watch Area.
- http://www.weather.gov/safety/flood

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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™

Flood Watch issued September 20 at 12:49PM MDT until September 20 at

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