Idaho, Oregon Severe Flash Flood Watch | Effective 09/03/2026 01:06

Headline: 
Flash Flood Watch issued September 3 at 2:06AM MDT until September 4 at 7:00PM MDT by NWS Boise ID
Event: 
Flash Flood Watch
Urgency: 
Future
Effective: 
September 3, 2026 - 1:06am
Expires: 
September 3, 2026 - 2:00pm
Description: 
* WHAT...Flash flooding and debris flows caused by excessive rainfall continue to be possible over the Second Flat, Bald Mountain, Fox, Powder River, Tartar burn scars. * WHERE...Portions of southwest Idaho, including the following areas, Lower Treasure Valley and West Central Mountains and southeast Oregon, including the following areas, Harney County and Malheur County. * WHEN...From this afternoon through Friday evening. * IMPACTS...Heavy rainfall over the Second Flat, Bald Mountain, Fox, Powder River, Tartar burn scar is expected up to and during the period of the watch. Residents near the Second Flat, Bald Mountain, Fox, Powder River, Tartar 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 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... Monument Peak, Mosquito Mountain, Warm Springs Reservoir, Coleman Mountain, Tencent Lake, Heath Lake, Lime, Dixie, Indian Head Mountain, Henley Basin, Buena Vista Field Station, Sheep Mountain, Sweedes Landing, McChord Butte and Bald Butte. - https://www.weather.gov/safety/flood
Instruction: 
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Area Description: 
West Central Mountains; Lower Treasure Valley; Harney County; Malheur County
Forcast Office: 
NWS Boise ID
Sender: 
w-nws.webmaster@noaa.gov