Red Flag Warning
Issued by NWS Pocatello, ID
Issued by NWS Pocatello, ID
013 WWUS85 KPIH 170810 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 210 AM MDT Sun Aug 17 2025 IDZ425-180300- /O.EXA.KPIH.FW.W.0019.250817T1800Z-250818T0300Z/ Middle Snake River Valley/Twin Falls BLM north of the Snake River- 210 AM MDT Sun Aug 17 2025 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR SCATTERED THUNDERSTORMS FOR FIRE WEATHER ZONE 425... * AFFECTED AREA...Fire Weather Zone 425 Middle Snake River Valley/Twin Falls BLM north of the Snake River. * THUNDERSTORMS...20 to 30 percent coverage. * OUTFLOW WINDS...A dry low-level environment will promote stronger storms capable of producing wind gusts up to 45 to 55 mph. * IMPACTS...Critical fire weather conditions are expected Sunday 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. && $$ IDZ410-411-413-422-427-475-476-180300- /O.CON.KPIH.FW.W.0019.250817T1800Z-250818T0300Z/ Upper Snake River Valley/Idaho Falls BLM- Centennial Mountains and Snake River Range/Targhee NF- Caribou Range/Caribou NF-Sawtooth Range/Northern Sawtooth NF- Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- East Salmon River Mountains/Salmon NF- Lemhi and Lost River Range/Challis NF- 210 AM MDT Sun Aug 17 2025 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR SCATTERED THUNDERSTORMS FOR FIRE WEATHER ZONES 410, 411, 413, 422, 427, 475, AND 476... * AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM, Fire Weather Zone 411 Centennial Mountains and Snake River Range/Targhee NF, Fire Weather Zone 413 Caribou Range/Caribou NF, Fire Weather Zone 422 Sawtooth Range/Northern Sawtooth NF, Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River, Fire Weather Zone 475 East Salmon River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF. * THUNDERSTORMS...25 to 45 percent coverage. * OUTFLOW WINDS...A dry low-level environment will promote stronger storms capable of producing wind gusts up to 45 to 55 mph. * IMPACTS...Critical fire weather conditions are expected Sunday afternoon and evening. Lightning may generate new fire starts. Any new fire starts or existing fires may spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && $$