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Severe · Flash Flood WarningThis alert has expired. It is kept for reference.

Flash Flood Warning issued September 18 at 2:45PM MDT until September 18

Affecting Blaine, ID; Butte, ID; Custer, ID

In effect until: Sep 18, 2026, 10:30 PM

Blaine, ID; Butte, ID; Custer, ID

Likely impact across 3 counties in ID; effects through 10:30 PM.

Get to higher ground now. Never drive through flooded roads.

See it on the live mapView official source
Read the original bulletin (official text)
At 245 PM MDT, Doppler radar indicated thunderstorms still capable of
producing heavy rain across the warned area, with rainfall rates of
0.25 to 0.5 inches in 1 hour. Flash flooding is ongoing or expected
to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.

Some locations that will experience flash flooding include...
Grouse.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™