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Severe · Flash Flood WatchActive alert

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

Affecting West Central Mountains; Lower Treasure Valley; Harney County; Malheur County

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

West Central Mountains; Lower Treasure Valley; Harney County; Malheur County

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.

Read the original bulletin (official text)
* 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
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™