Active Weather Alerts
Red Flag Warning
Issued: 8:15 AM Aug. 1, 2025 – National Weather Service
...RED FLAG WARNING IN EFFECT FROM 2 PM THIS AFTERNOON TO 10 PM MDT THIS EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY, AND ISOLATED MOUNTAIN THUNDERSTORMS FOR FIRE WEATHER ZONES 410, 413, 425, AND 427... * AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM, Fire Weather Zone 413 Caribou Range/Caribou NF, Fire Weather Zone 425 Middle Snake River Valley/Twin Falls BLM north of the Snake River and Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River. * WINDS...West/southwest 10 to 25 mph with gusts of 25 to 40 mph. * RELATIVE HUMIDITY...As low as 10 percent. * THUNDERSTORMS...15 to 25 percent coverage in the mountains. * OUTFLOW WINDS...A dry low level environment will promote stronger storms capable of producing wind gusts up to 50 mph. * IMPACTS...Critical fire weather conditions are expected this afternoon and evening. Lightning may generate new fire starts. Any new fire starts or existing fires may spread rapidly. 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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