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WWUS85 KBOI 171942
RFWBOI

URGENT - FIRE WEATHER MESSAGE
National Weather Service Boise ID
142 PM MDT Thu Sep 17 2026

...SCATTERED THUNDERSTORMS WITH GUSTY WINDS AND LITTLE RAINFALL...

A strong low pressure system in northeastern California will
bring scattered thunderstorms this afternoon and evening with
outflow wind gusts up to 50 mph and little rainfall. As the low
moves into southeastern Oregon late tonight and southwestern
Idaho on Friday, scattered thunderstorms will develop again,
especially on the Idaho side.

IDZ403-421-181300-
/O.NEW.KBOI.FW.A.0014.260918T0900Z-260919T0300Z/
/O.CON.KBOI.FW.W.0023.000000T0000Z-260918T0300Z/
Northern Boise National Forest-
Southern Boise/Western Sawtooth NF, including the Camas Prairie-
142 PM MDT Thu Sep 17 2026

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING
FOR LIGHTNING FOR NORTHERN BOISE NATIONAL FOREST...SOUTHERN
BOISE/WESTERN SAWTOOTH NF, INCLUDING THE CAMAS PRAIRIE...BURNS
BLM...STEENS MOUNTAIN...NORTHWESTERN VALE BLM AND BAKER VALLEY...
WHICH ARE FIRE WEATHER ZONES 403...421...670...671...674 AND
675...
...FIRE WEATHER WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING FOR WINDS AND LOW RELATIVE HUMIDITIES FOR NORTHERN BOISE
NATIONAL FOREST AND SOUTHERN BOISE/WESTERN SAWTOOTH NF, INCLUDING
THE CAMAS PRAIRIE...WHICH ARE FIRE WEATHER ZONES 403 AND 421...

The National Weather Service in Boise has issued a Fire Weather
Watch for winds and low relative humidities, which is in effect
from late tonight through Friday evening.

* AFFECTED AREA...In Idaho, Fire Weather Zones 403 Northern
  Boise National Forest, 421 Southern Boise/Western Sawtooth NF
  and including the Camas Prairie.

* TIMING...For the Red Flag Warning, until 9 PM MDT this
  evening. For the Fire Weather Watch, from late tonight through
  Friday evening.

* WINDS...For the Fire Weather Watch, Northwest 5 to 10 mph with
  gusts up to 25 mph.

* RELATIVE HUMIDITY...For the Fire Weather Watch, 39 to 53
  percent.

* TEMPERATURES...For the Fire Weather Watch, 56 to 68 degrees.

* THUNDERSTORMS...Scattered coverage with abundant lightning.

* OUTFLOW WINDS...Gusty erratic winds up to 50 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.

A Fire Weather Watch means that critical fire weather conditions
are possible. Listen for later forecasts and possible Red Flag
Warnings.

&&

$$
L W

ORZ670-671-674-675-180300-
/O.CON.KBOI.FW.W.0023.000000T0000Z-260918T0300Z/
Burns BLM-Steens Mountain-Northwestern Vale BLM-Baker Valley-
1242 PM PDT Thu Sep 17 2026

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR LIGHTNING FOR NORTHERN BOISE NATIONAL FOREST...SOUTHERN
BOISE/WESTERN SAWTOOTH NF, INCLUDING THE CAMAS PRAIRIE...BURNS
BLM...STEENS MOUNTAIN...NORTHWESTERN VALE BLM AND BAKER VALLEY...
WHICH ARE FIRE WEATHER ZONES 403...421...670...671...674 AND
675...

* AFFECTED AREA...In Oregon, Fire Weather Zones 670 Burns BLM,
  671 Steens Mountain, 674 Northwestern Vale BLM and 675 Baker
  Valley.

* TIMING...Until 8 PM PDT this evening.

* THUNDERSTORMS...Scattered coverage with abundant lightning.

* OUTFLOW WINDS...Gusty erratic winds up to 50 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.

&&

$$
L

IDZ423-424-426-181300-
/O.NEW.KBOI.FW.A.0014.260918T0900Z-260919T0300Z/
Owyhee Mountains-Western Twin Falls BLM-Southern Highlands-
142 PM MDT Thu Sep 17 2026

...FIRE WEATHER WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING FOR WINDS AND LOW RELATIVE HUMIDITIES FOR OWYHEE
MOUNTAINS...WESTERN TWIN FALLS BLM AND SOUTHERN HIGHLANDS...WHICH
ARE FIRE WEATHER ZONES 423...424 AND 426...

The National Weather Service in Boise has issued a Fire Weather
Watch for winds and low relative humidities, which is in effect
from after midnight tonight through Friday evening.

* AFFECTED AREA...In Idaho, Fire Weather Zones 423 Owyhee
  Mountains, 424 Western Twin Falls BLM and 426 Southern
  Highlands.

* TIMING...From late tonight through Friday evening.

* WINDS...Northwest 5 to 15 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...34 to 46 percent.

* TEMPERATURES...65 to 73 degrees.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that critical fire weather conditions
are possible. Listen for later forecasts and possible Red Flag
Warnings.

&&

$$
W