Severe · Flash Flood WatchActive alert
Flash Flood Watch issued October 21 at 11:47AM MDT until October 23
Affecting Upper Snake River Plain; Wood River Foothills
In effect until: Oct 22, 2026, 12:00 PM
Upper Snake River Plain; Wood River Foothills
Possible impact zone; conditions develop through 12:00 PM.
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Read the original bulletin (official text)
* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Big Rock burn scar and Ohio burn scar. * WHERE...Portions of central and southeast Idaho, including the following areas, in central Idaho, Wood River Foothills. In southeast Idaho, Upper Snake River Plain. * WHEN...From Thursday evening through Friday afternoon. * IMPACTS...Heavy rainfall over the Big Rock and Ohio burn scar is expected up to and during the period of the watch. Residents near the Big Rock and Ohio burn scar should prepare for potential debris flow. Be sure to stay up to date with information from local authorities. Heavy rainfall could trigger flash flooding and debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall over the Big Rock and Ohio burn scar, which may lead to flash flooding and debris flows. - Some locations that may experience flash flooding include... Heise. - http://www.weather.gov/safety/flood
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™