Red Flag Warning

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pocatello ID
116 AM MDT Thu Aug 13 2026

...CRITICAL FIRE WEATHER CONDITIONS THURSDAY DUE TO SCATTERED
THUNDERSTORMS...

IDZ410-411-413-422-425-427-475-476-140300-
/O.CON.KPIH.FW.W.0021.260813T1800Z-260814T0300Z/
Upper Snake River Valley/Idaho Falls BLM-
Centennial Mountains and Snake River Range/Targhee NF-
Caribou Range/Caribou NF-Sawtooth Range/Northern Sawtooth NF-
Middle Snake River Valley/Twin Falls BLM north of the Snake River-
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-
116 AM MDT Thu Aug 13 2026

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT
THIS EVENING FOR SCATTERED THUNDERSTORMS FOR IDAHO FIRE WEATHER
ZONES 410, 411, 413, 422, 425, 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 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...Erratic winds 35 to 45 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.

&&

$$

URGENT - FIRE WEATHER MESSAGE
National Weather Service Boise ID
120 PM MDT Wed Aug 12 2026

...MONSOON MOISTURE WILL BRING SCATTERED THUNDERSTORMS THURSDAY...

A push of monsoon moisture will bring scattered thunderstorms to
the region Thursday afternoon through Friday morning. Lingering
dry surface air will limit the rainfall amounts on Thursday,
increasing concern for lightning ignitions.

IDZ400>403-420-421-423-424-426-ORZ672-131630-
/O.UPG.KBOI.FW.A.0008.260813T2100Z-260814T1200Z/
/O.NEW.KBOI.FW.W.0018.260813T2100Z-260814T1200Z/
Northern Boise BLM-Western Payette National Forest-
Eastern Payette National Forest-Northern Boise National Forest-
Treasure Valley BLM-
Southern Boise/Western Sawtooth NF, including the Camas Prairie-
Owyhee Mountains-Western Twin Falls BLM-Southern Highlands-
Southern Grasslands-
120 PM MDT Wed Aug 12 2026 /1220 PM PDT Wed Aug 12 2026/

...RED FLAG WARNING IN EFFECT FROM 3 PM MDT /2 PM PDT/ THURSDAY
TO 6 AM MDT /5 AM PDT/ FRIDAY FOR LIGHTNING FOR NORTHERN BOISE
BLM...WESTERN PAYETTE NATIONAL FOREST...EASTERN PAYETTE NATIONAL
FOREST...NORTHERN BOISE NATIONAL FOREST...TREASURE VALLEY BLM...
SOUTHERN BOISE/WESTERN SAWTOOTH NF, INCLUDING THE CAMAS PRAIRIE...
OWYHEE MOUNTAINS...WESTERN TWIN FALLS BLM...SOUTHERN HIGHLANDS
AND SOUTHERN GRASSLANDS...WHICH ARE FIRE WEATHER ZONES 400...
401...402...403...420...421...423...424...426 AND 672...

The National Weather Service in Boise has issued a Red Flag
Warning for lightning, which is in effect from 3 PM MDT /2 PM
PDT/ Thursday to 6 AM MDT /5 AM PDT/ Friday. The Fire Weather
Watch is no longer in effect.

* AFFECTED AREA...In Idaho, Fire Weather Zones 400 Northern
  Boise BLM, 401 Western Payette National Forest, 402 Eastern
  Payette National Forest, 403 Northern Boise National Forest,
  420 Treasure Valley BLM, 421 Southern Boise/Western Sawtooth
  NF, including the Camas Prairie, 423 Owyhee Mountains, 424
  Western Twin Falls BLM and 426 Southern Highlands. In Oregon,
  Fire Weather Zone 672 Southern Grasslands.

* TIMING...From 3 PM MDT /2 PM PDT/ Thursday to 6 AM MDT /5 AM
  PDT/ Friday.

* THUNDERSTORMS...Scattered coverage with abundant lightning.

* OUTFLOW WINDS...Gusty erratic winds up to 40 mph.

* IMPACTS...Any fire that develops will catch and spread
  quickly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will occur shortly.

&&

$$
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