Severe · Flash Flood WatchActive alert

Flash Flood Watch issued September 3 at 2:06AM MDT until September 4

Affecting Boise Mountains

In effect until: Sep 3, 2026, 9:00 PM

Boise Mountains

Possible impact zone; conditions develop through 9:00 PM.

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 and debris flows caused by excessive rainfall
continue to be possible over the Wapiti Burn Area.

* WHERE...A portion of southwest Idaho, including the following area,
Boise Mountains.

* WHEN...Through Friday evening.

* IMPACTS...Heavy rainfall over the Wapiti Burn Area is expected up
to and during the period of the watch. debris flow. Be sure to stay
up to date with information from local authorities. Heavy rainfall
could trigger flash flooding or debris flows in and near recent
wildfire burn scars.

* ADDITIONAL DETAILS...
- National Weather Service Meteorologists are forecasting heavy
rainfall over the burn scar, which may lead to flash flooding and
debris flows.
- Some locations that may experience flash flooding include...
Grandjean.
- https://www.weather.gov/safety/flood

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

Flash Flood Watch issued September 3 at 2:06AM MDT until September 4

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