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Severe · Flood WatchActive alert

Flood Watch issued September 18 at 10:30AM MDT until September 19 at

Affecting Upper Snake River Plain

In effect until: Sep 19, 2026, 6:00 AM

Upper Snake River Plain

Possible impact zone; conditions develop through 6:00 AM.

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)
The Flash Flood Watch for the Big Rock burn scar is being replaced
with a more broad Flash Flood Watch across eastern Idaho.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™