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