Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Pocatello ID
317 AM MDT Sat Aug 22 2026
...CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED ON SATURDAY DUE
TO SCATTERED THUNDERSTORM ACTIVITY ACROSS MUCH OF EASTERN IDAHO...
IDZ410-422-425-427-475-476-230300-
/O.CON.KPIH.FW.W.0022.260822T1800Z-260823T0300Z/
Upper Snake River Valley/Idaho Falls BLM-
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-
317 AM MDT Sat Aug 22 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT
THIS EVENING FOR SCATTERED THUNDERSTORMS FOR FIRE WEATHER ZONES
410, 422, 425, 427, 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 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...Gusty and erratic winds to 60 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.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Spokane WA
1213 AM PDT Sat Aug 22 2026
...THUNDERSTORMS, GUSTY WINDS, AND LOW RELATIVE HUMIDITY SATURDAY
INTO SUNDAY...
.A strong cold front will move through the region Saturday into
Sunday, bringing a risk for thunderstorms and strong west to
southwest winds. This will lead to critical fire weather
conditions across the region.
IDZ101-WAZ700-222200-
/O.CON.KOTX.FW.W.0022.260822T2300Z-260823T1800Z/
Northern and Central Idaho Panhandle (Zone 101)-
Selkirk Mountains of Northeast Washington (Zone 700)-
1213 AM PDT Sat Aug 22 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 4 PM SATURDAY TO 11 AM
PDT SUNDAY FOR THUNDERSTORMS FOR FIRE WEATHER ZONE 101 AND 700...
* Affected Area: Northern and Central Idaho Panhandle (Zone 101)
and Selkirk Mountains of Northeast Washington (Zone 700).
* Thunderstorms: Scattered showers and thunderstorms Saturday
afternoon through Sunday morning.
* Outflow Winds: Gusty outflow wind gusts up to 50 mph.
* Impacts: Lightning strikes will have the potential to start new
fires, and gusty and erratic outflow winds could cause rapid
spread of new and existing wildfires.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now....or will shortly. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Spokane WA
1213 AM PDT Sat Aug 22 2026
...THUNDERSTORMS, GUSTY WINDS, AND LOW RELATIVE HUMIDITY SATURDAY
INTO SUNDAY...
.A strong cold front will move through the region Saturday into
Sunday, bringing a risk for thunderstorms and strong west to
southwest winds. This will lead to critical fire weather
conditions across the region.
WAZ701-702-705>709-222200-
/O.CON.KOTX.FW.W.0022.260822T1900Z-260823T0500Z/
Foothills of Northeast Washington (Zone 701)-
Colville Reservation (Zone 702)-
Foothills of Central Washington Cascades (Zone 705)-
Waterville Plateau (Zone 706)-Western Columbia Basin (Zone 707)-
Eastern Columbia Basin - Palouse - Spokane Area (Zone 708)-
Lower Palouse - Snake River (Zone 709)-
1213 AM PDT Sat Aug 22 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 10 PM PDT
SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES
701, 702, 705, 706, 707, 708, AND 709...
* Affected Area: Foothills of Northeast Washington (Zone 701),
Colville Reservation (Zone 702), Foothills of Central
Washington Cascades (Zone 705), Waterville Plateau (Zone 706),
Western Columbia Basin (Zone 707), Eastern Columbia Basin -
Palouse -Spokane Area (Zone 708) and Lower Palouse -Snake
River (Zone 709).
* Winds: West/Southwest 10 to 20 mph with gusts up to 35 mph.
* Thunderstorms: Isolated thunderstorms may develop on Saturday,
especially zones 702, 708 and 709. Gusty outflow winds are
expected near thunderstorms.
* Outflow Winds: Gusty outflow wind gusts up to 40 mph.
* Relative Humidities: 17 to 25 percent.
* Impacts: Rapid fire spread is possible with any new or ongoing
fires. Lightning strikes will have the potential to start new
fires with gusty outflow winds.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now....or will shortly. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Boise ID
520 PM MDT Fri Aug 21 2026
...GUSTY WINDS AND LOW RELATIVE HUMIDITIES ACROSS PORTIONS OF
SOUTHEAST OREGON DISTRICTS...
...SCATTERED THUNDERSTORMS WITH LIGHTNING EXPECTED ACROSS
PORTIONS OF SOUTHWEST IDAHO DISTRICTS...
Pre-frontal winds pick up on Saturday with afternoon wind gusts
up to 35 mph at the same time RHs are 10-15% across Oregon zones
670, 671 and 672. In addition, isolated thunderstorms are
possible over mountains early Saturday increasing in coverage
across portions of Southwest Idaho Saturday afternoon and
evening. Isolated thunderstorms possible across the Vale district
Saturday afternoon with frontal passage. Storms that do develop
will be fairly strong, capable of producing lightning, outflow
gusts up to 50 mph, and heavy rain.
IDZ401>403-421-424-426-222100-
/O.NEW.KBOI.FW.W.0019.260822T1800Z-260823T0600Z/
Western Payette National Forest-Eastern Payette National Forest-
Northern Boise National Forest-
Southern Boise/Western Sawtooth NF, including the Camas Prairie-
Western Twin Falls BLM-Southern Highlands-
520 PM MDT Fri Aug 21 2026
...RED FLAG WARNING IN EFFECT FROM NOON SATURDAY TO MIDNIGHT MDT
SATURDAY NIGHT FOR LIGHTNING FOR WESTERN PAYETTE NATIONAL
FOREST...EASTERN PAYETTE NATIONAL FOREST... NORTHERN BOISE
NATIONAL FOREST...SOUTHERN BOISE/WESTERN SAWTOOTH NF, INCLUDING
THE CAMAS PRAIRIE...WESTERN TWIN FALLS BLM AND SOUTHERN
HIGHLANDS...WHICH ARE FIRE WEATHER ZONES 401...402...
403...421...424 AND 426...
The National Weather Service in Boise has issued a Red Flag
Warning for lightning, which is in effect from noon Saturday to
midnight MDT Saturday night.
* AFFECTED AREA...In Idaho, Fire Weather Zones 401 Western
Payette National Forest, 402 Eastern Payette National Forest,
403 Northern Boise National Forest, 421 Southern Boise/Western
Sawtooth NF, including the Camas Prairie, 424 Western Twin
Falls BLM and 426 Southern Highlands.
* TIMING...From noon Saturday to midnight MDT Saturday night.
* 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.
&&
$$
W
URGENT - FIRE WEATHER MESSAGE
National Weather Service Pendleton OR
1157 AM PDT Fri Aug 21 2026
...WIDESPREAD BREEZY WESTERLY WINDS AND LOW RELATIVE HUMIDITY
SATURDAY...
...HIGH-BASED SHOWERS AND THUNDERSTORMS TONIGHT AND SATURDAY
ALONG THE WASHINGTON CASCADES AND BLUE MOUNTAINS...
.An approaching low-pressure system will bring widespread breezy
westerly winds through the Cascade gaps, across the Columbia
Basin, and into portions of the Blue Mountains Saturday. Coupled
with low relative humidity, this will lead to critical fire
weather conditions. Moreover, high-based showers and
thunderstorms are forecast, with the best chances of abundant
lightning overnight through Saturday morning along the Washington
Cascades and Saturday afternoon for the northeast Blue Mountains.
ORZ693-WAZ693-221400-
/O.NEW.KPDT.FW.W.0020.260822T1700Z-260823T0300Z/
Canyon Grasslands of Wallowa County-
Southeast Washington Grande Ronde Valley-
1157 AM PDT Fri Aug 21 2026
...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM PDT SATURDAY FOR
WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES OR693 AND
WA693...
The National Weather Service in Pendleton has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
from 10 AM to 8 PM PDT Saturday.
* AFFECTED AREA...Fire Weather Zones 693 Canyon Grasslands of
Wallowa County and 693 Southeast Washington Grande Ronde
Valley.
* TIMING...From 10 AM to 8 PM PDT Saturday.
* WINDS...Southwest 10 to 20 mph with gusts of 20 to 30 mph,
shifting to the northwest 10 to 20 mph with gusts of 20 to 30
mph late afternoon and evening.
* RELATIVE HUMIDITY...10 to 20 percent late morning and afternoon.
* 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 shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.
&&
$$
Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service Spokane WA
949 PM PDT Fri Aug 21 2026
IDZ001>004-026-WAZ036-037-230200-
/O.EXT.KOTX.HT.Y.0004.000000T0000Z-260823T0200Z/
Northern Panhandle-Coeur d`Alene Area-Idaho Palouse-Central
Panhandle Mountains-Lewiston Area-Spokane Area-Northeast
Mountains-
Including the cities of Moscow, Lookout Pass, Colville, Fernwood,
Gifford, Deer Park, Hayden, Coeur d`Alene, Bonners Ferry, Post
Falls, Lapwai, Rockford, Metaline Falls, Sandpoint, Fruitland,
Cheney, Springdale-Hunters Road, Flowery Trail Road, Dobson Pass,
Davenport, Metaline, Peck, Wallace, Fairfield, Newport, Clark
Fork, Ione, Priest River, Tiger, Kellogg, Schweitzer Mountain
Road, St. Maries, Spokane Valley, Athol, Pinehurst, Lewiston,
Worley, Genesee, Fourth Of July Pass, Orin-Rice Road, Kettle
Falls, Osburn, Potlatch, Eastport, Lewiston Grade, Mullan,
Downtown Spokane, Chewelah, Northport, Plummer, Airway Heights,
and Culdesac
949 PM PDT Fri Aug 21 2026
...HEAT ADVISORY NOW IN EFFECT UNTIL 7 PM PDT SATURDAY...
* WHAT...High temperatures ranging from the mid to upper 90s
resulting in Moderate to Major HeatRisk.
* WHERE...Moscow, Lookout Pass, Colville, Fernwood, Gifford, Deer
Park, Hayden, Coeur d`Alene, Bonners Ferry, Post Falls, Lapwai,
Rockford, Metaline Falls, Sandpoint, Fruitland, Cheney,
Springdale-Hunters Road, Flowery Trail Road, Dobson Pass,
Davenport, Metaline, Peck, Wallace, Fairfield, Newport, Clark
Fork, Ione, Priest River, Tiger, Kellogg, Schweitzer Mountain
Road, St. Maries, Spokane Valley, Athol, Pinehurst, Lewiston,
Worley, Genesee, Fourth Of July Pass, Orin-Rice Road, Kettle
Falls, Osburn, Potlatch, Eastport, Lewiston Grade, Mullan,
Downtown Spokane, Chewelah, Northport, Plummer, Airway Heights,
and Culdesac.
* WHEN...Until 7 PM PDT Saturday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* ADDITIONAL DETAILS...Low temperatures in the 60s and 70s Friday
night have provided little overnight relief and temperatures will
warm into the 90s Saturday afternoon.
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.
&&
$$
SB
Fire Weather Watch
URGENT - FIRE WEATHER MESSAGE...CORRECTED
National Weather Service Missoula MT
430 PM MDT Fri Aug 21 2026
...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SUNDAY MORNING DUE TO LIGHTNING FOR KOOTENAI, WEST LOLO, AND FLATHEAD
RESERVATION...
...FIRE WEATHER WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY
EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST
BEAVERHEAD AND EAST BEAVERHEAD...
...
.Antecedent conditions have been very dry and warm. The Kootenai
Forest especially has received well below normal precipitation since
early July. Thunderstorms with little to no precipitation Saturday
evening and overnight will be followed Sunday with a dry cold front.
Increased winds and lowering relative humidities behind the front on
Sunday will potentially bring critical fire weather conditions to
southwest Montana.
MTZ104-106-107-220630-
/O.COR.KMSO.FW.A.0006.260822T2300Z-260823T1800Z/
Kootenai-West Lolo-Flathead Reservation-
430 PM MDT Fri Aug 21 2026
...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SUNDAY MORNING...
The National Weather Service in Missoula MT has issued a Fire Weather
Watch.
* AFFECTED AREA...Fire Weather Zones 104, 106, and 107.
* TIMING...From Saturday afternoon through Sunday morning.
* LIGHTNING...Afternoon and evening thunderstorms will transition to
nocturnal thunderstorms. Dry surface conditions could lead to
lightning producing storms with little to no precipitation.
* OUTFLOW WINDS...Through 9 pm erratic winds 25 to 40 mph.
* IMPACTS...Lightning strikes will have the potential to start new
fires, and gusty outflow winds could cause rapid spread of new and
existing wildfires.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Please advise the appropriate officials or fire crews in the field of
this Fire Weather Watch.
&&
$$
URGENT - FIRE WEATHER MESSAGE...CORRECTED
National Weather Service Missoula MT
430 PM MDT Fri Aug 21 2026
...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SUNDAY MORNING DUE TO LIGHTNING FOR KOOTENAI, WEST LOLO, AND FLATHEAD
RESERVATION...
...FIRE WEATHER WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY
EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST
BEAVERHEAD AND EAST BEAVERHEAD...
...
.Antecedent conditions have been very dry and warm. The Kootenai
Forest especially has received well below normal precipitation since
early July. Thunderstorms with little to no precipitation Saturday
evening and overnight will be followed Sunday with a dry cold front.
Increased winds and lowering relative humidities behind the front on
Sunday will potentially bring critical fire weather conditions to
southwest Montana.
MTZ110-111-220630-
/O.COR.KMSO.FW.A.0006.260823T1800Z-260824T0300Z/
Deerlodge/West Beaverhead-East Beaverhead-
430 PM MDT Fri Aug 21 2026
...FIRE WEATHER WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY
EVENING...
The National Weather Service in Missoula MT has issued a Fire Weather
Watch.
* AFFECTED AREA...Fire Weather Zones 110 and 111.
* TIMING...From Sunday afternoon through Sunday evening.
* WINDS...Southwest winds 10 to 20 mph with gusts up to 35 mph.
* RELATIVE HUMIDITY...Relative Humidity between 15 to 25 percent.
* IMPACTS...Any new or existing fires may spread rapidly.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Please advise the appropriate officials or fire crews in the field of
this Fire Weather Watch.
&&
$$
