Active Weather Alerts
Red Flag Warning
Issued: 7:06 AM Aug. 1, 2026 – National Weather Service
...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 9 PM MDT SUNDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 410, 422, 425, 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 475 East Salmon River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF. * WINDS...West to southwest 15 to 25 mph with gusts up to 30 mph Saturday afternoon with gusts to 40 mph Sunday afternoon. * RELATIVE HUMIDITY...10-15 percent with a few areas falling below 10 percent. * IMPACTS...Wind and low humidity can lead to rapid spread of fire and more intense fire in receptive fuels. 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. &&
Heat Advisory
Issued: 6:42 AM Aug. 1, 2026 – National Weather Service
...HEAT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... * WHAT...Highs in the mid 90s to around 100. * WHERE...Challis/Pahsimeroi Valleys, Lost River Valley, Wood River Foothills, Beaverhead - Lemhi Highlands, Teton Valley, Eastern Magic Valley, Shoshone/Lava Beds, Arco/Mud Lake Desert, Bear Lake Valley, Lower Snake River Plain, Raft River Region, and Upper Snake River Plain. * WHEN...Until midnight MDT tonight. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. If you do not have air conditioning in your home or lack shelter, you can call 211 or visit 211-idaho.communityos.org for assistance locating appropriate shelter from the heat. &&
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