Red Flag Warning

Locations Affected

Idaho Falls, ID ∙ Shoup, ID ∙ Baker, ID ∙ Butte City, ID ∙ Firth, ID ∙ Clementsville, ID ∙ Murtaugh, ID ∙ Declo, ID ∙ Howe, ID ∙ Menan, ID

Headline

...CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED ON SATURDAY DUE TO SCATTERED THUNDERSTORM ACTIVITY ACROSS MUCH OF EASTERN IDAHO...

Full Alert Message

URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 317 AM MDT Sat Aug 22 2026 ...CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED ON SATURDAY DUE TO SCATTERED THUNDERSTORM ACTIVITY ACROSS MUCH OF EASTERN IDAHO... ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR SCATTERED THUNDERSTORMS FOR FIRE WEATHER ZONES 410, 422, 425, 427, 475, AND 476... * AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM, Fire Weather Zone 422 Sawtooth Range/Northern Sawtooth NF, Fire Weather Zone 425 Middle Snake River Valley/Twin Falls BLM north of the Snake River, Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River, Fire Weather Zone 475 East Salmon River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF. * IMPACTS...Frequent lightning will increase risk of new fire starts. * THUNDERSTORMS...Scattered coverage with frequent lightning. * OUTFLOW WINDS...Gusty and erratic winds to 60 mph. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies.

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