Severe · Red Flag WarningActive alert

Red Flag Warning issued September 11 at 2:17AM MDT until September 11

Affecting Upper Snake River Valley/Idaho Falls BLM

In effect until: Sep 12, 2026, 3:00 AM

Upper Snake River Valley/Idaho Falls BLM

Likely impact; effects through 3:00 AM.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain.

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* AFFECTED AREA...Fire Weather Zone 410 Upper Snake River
Valley/Idaho Falls BLM.

* WINDS...Southwest 15 to 25 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...As low as 12 percent.

* IMPACTS...Existing or new fires could grow rapidly.

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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™

Red Flag Warning issued September 11 at 2:17AM MDT until September 11

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