Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
834 PM PDT Fri Aug 21 2026
ORZ625-221200-
/O.CON.KMFR.FW.W.0018.260822T2100Z-260823T0400Z/
South Central Oregon Desert including the BLM Land in Eastern
Lake and Western Harney Counties-
834 PM PDT Fri Aug 21 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 9 PM PDT
SATURDAY FOR STRONG GUSTY WIND AND LOW RH FOR FIRE WEATHER ZONE
625...
* IMPACTS...Gusty winds combined with low RH could lead to the
rapid spread of any new or existing fires.
* AFFECTED AREA...In Oregon...Fire weather zone 625, including
the high desert of Lake County and the Hart Mountain Antelope
Refuge.
* WIND...South to southwest 15 to 25 mph with with gusts 30 to
35 mph.
* HUMIDITY...Minimum humidity 10 to 15 percent.
* DETAILED URL...View the hazard area in detail at
https://weather.gov/wrh/hazards?wfo=mfr
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Follow all fire restrictions. You can find your county`s
emergency sign up form as well as links to fire restrictions at
weather.gov/medford/wildfire. One less spark, one less wildfire.
Be sure you`re signed up for your county`s emergency alert
system. Familiarize yourself with your emergency plan and make
sure you listen to emergency services. Visit ready.gov/plan for
more information.
A Red Flag Warning is issued when we identify weather conditions
that promote rapid spread of fire which may become life-
threatening. This does not mean there is a fire. These conditions
are either occurring now or will begin soon. It is important to
have multiple ways to receive information from authorities.
&&
$$
Visit us at www.weather.gov/Medford
URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
834 PM PDT Fri Aug 21 2026
ORZ624-221200-
/O.CAN.KMFR.FW.W.0017.000000T0000Z-260822T0400Z/
/O.CON.KMFR.FW.W.0018.260822T2100Z-260823T0400Z/
Klamath Basin and the Fremont-Winema National Forest-
834 PM PDT Fri Aug 21 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 9 PM PDT
SATURDAY FOR STRONG GUSTY WIND AND LOW RH FOR FIRE WEATHER ZONE
624...
* IMPACTS...Gusty winds combined with low RH could lead to the
rapid spread of any new or existing fires.
* AFFECTED AREA...In Oregon, Fire weather zone 624, including
the Wrights Spring Fire and the Fremont-Winema National
Forest.
* WIND...South to southwest 15 to 20 mph with gusts up to 30
mph.
* HUMIDITY...Minimum humidity around 12 to 18 percent.
* DETAILED URL...View the hazard area in detail at
https://weather.gov/wrh/hazards?wfo=mfr
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Follow all fire restrictions. You can find your county`s
emergency sign up form as well as links to fire restrictions at
weather.gov/medford/wildfire. One less spark, one less wildfire.
Be sure you`re signed up for your county`s emergency alert
system. Familiarize yourself with your emergency plan and make
sure you listen to emergency services. Visit ready.gov/plan for
more information.
A Red Flag Warning is issued when we identify weather conditions
that promote rapid spread of fire which may become life-
threatening. This does not mean there is a fire. These conditions
are either occurring now or will begin soon. It is important to
have multiple ways to receive information from authorities.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
834 PM PDT Fri Aug 21 2026
CAZ284-285-221200-
/O.CAN.KMFR.FW.W.0017.000000T0000Z-260822T0400Z/
/O.CON.KMFR.FW.W.0018.260822T2100Z-260823T0400Z/
Siskiyou County from the Cascade Mountains East and South to Mt
Shasta-Modoc County Except for the Surprise Valley-
834 PM PDT Fri Aug 21 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 9 PM PDT
SATURDAY FOR STRONG GUSTY WIND AND LOW RH FOR FIRE WEATHER ZONES
284 AND 285...
* IMPACTS...Gusty winds combined with low RH could lead to the
rapid spread of any new or existing fires.
* AFFECTED AREA...In California...Fire weather zones 284 and
285, including the Modoc National Forest.
* WIND...South to southwest 15 to 20 mph with gusts 25 to 30
mph.
* HUMIDITY...Minimum humidity 10 to 17 percent.
* DETAILED URL...View the hazard area in detail at
https://weather.gov/wrh/hazards?wfo=mfr
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Follow all fire restrictions. You can find your county`s
emergency sign up form as well as links to fire restrictions at
weather.gov/medford/wildfire. One less spark, one less wildfire.
Be sure you`re signed up for your county`s emergency alert
system. Familiarize yourself with your emergency plan and make
sure you listen to emergency services. Visit ready.gov/plan for
more information.
A Red Flag Warning is issued when we identify weather conditions
that promote rapid spread of fire which may become life-
threatening. This does not mean there is a fire. These conditions
are either occurring now or will begin soon. It is important to
have multiple ways to receive information from authorities.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Boise ID
520 PM MDT Fri Aug 21 2026
...GUSTY WINDS AND LOW RELATIVE HUMIDITIES ACROSS PORTIONS OF
SOUTHEAST OREGON DISTRICTS...
...SCATTERED THUNDERSTORMS WITH LIGHTNING EXPECTED ACROSS
PORTIONS OF SOUTHWEST IDAHO DISTRICTS...
Pre-frontal winds pick up on Saturday with afternoon wind gusts
up to 35 mph at the same time RHs are 10-15% across Oregon zones
670, 671 and 672. In addition, isolated thunderstorms are
possible over mountains early Saturday increasing in coverage
across portions of Southwest Idaho Saturday afternoon and
evening. Isolated thunderstorms possible across the Vale district
Saturday afternoon with frontal passage. Storms that do develop
will be fairly strong, capable of producing lightning, outflow
gusts up to 50 mph, and heavy rain.
ORZ670>672-222100-
/O.NEW.KBOI.FW.W.0019.260822T1800Z-260823T0300Z/
Burns BLM-Steens Mountain-Southern Grasslands-
420 PM PDT Fri Aug 21 2026
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM PDT SATURDAY FOR
WINDS AND LOW RELATIVE HUMIDITIES FOR BURNS BLM...STEENS MOUNTAIN
AND SOUTHERN GRASSLANDS...WHICH ARE FIRE WEATHER ZONES 670...
671 AND 672...
The National Weather Service in Boise has issued a Red Flag
Warning for winds and low relative humidities, which is in effect
from 11 AM to 8 PM PDT Saturday.
* AFFECTED AREA...In Oregon, Fire Weather Zones 670 Burns BLM,
671 Steens Mountain and 672 Southern Grasslands.
* TIMING...From 11 AM to 8 PM PDT Saturday.
* WINDS...Southwest 15 to 25 mph with gusts up to 35 mph.
* RELATIVE HUMIDITY...10 to 15 percent.
* TEMPERATURES...86 to 94 degrees.
* THUNDERSTORMS...Isolated coverage with lightning across 671 and
672.
* IMPACTS...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will occur shortly.
&&
$$
W
URGENT - FIRE WEATHER MESSAGE
National Weather Service 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 Pocatello ID
1241 PM MDT Fri Aug 21 2026
...CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED ON SATURDAY DUE
TO SCATTERED THUNDERSTORM ACTIVITY ACROSS MUCH OF EASTERN
IDAHO...
IDZ410-422-425-427-475-476-221200-
/O.NEW.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-
1241 PM MDT Fri Aug 21 2026
...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT SATURDAY FOR
SCATTERED THUNDERSTORMS FOR FIRE WEATHER ZONES 410, 422, 425,
427, 475, AND 476...
The National Weather Service in Pocatello has issued a Red Flag
Warning for scattered thunderstorms, which is in effect from noon
to 9 PM MDT Saturday.
* 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 Reno NV
737 AM PDT Fri Aug 21 2026
CAZ270-278-NVZ458-221445-
/O.UPG.KREV.FW.A.0008.260822T1800Z-260823T0600Z/
/O.NEW.KREV.FW.W.0009.260822T1800Z-260823T0600Z/
Surprise Valley California-Eastern Lassen County-
Northern Washoe County-
737 AM PDT Fri Aug 21 2026
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM PDT SATURDAY
FOR GUSTY WINDS AND LOW HUMIDITY FOR NORTHEASTERN CALIFORNIA AND
FAR NORTHEASTERN NEVADA...
The National Weather Service in Reno has issued a Red Flag
Warning for gusty winds and low humidity, which is in effect from
11 AM to 11 PM PDT Saturday. The Fire Weather Watch is no longer
in effect.
* CHANGES...Upgraded the Fire Weather Watch to a Red Flag Warning.
* Affected Area...Fire Weather Zone 270 Surprise Valley
California, Fire Weather Zone 278 Eastern Lassen County, Fire
Weather Zone 458 Northern Washoe County.
* Winds...Southwest 15 to 25 mph with gusts up to 40 mph.
* Humidity...As low as 12 percent.
* Duration...3 to 6 hours.
* Impacts...The combination of gusty winds and low humidity can
cause fire to rapidly grow in size and intensity before first
responders can contain them.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Avoid outdoor activities that can cause a spark near dry
vegetation, such as yard work, target shooting, or campfires.
Follow local fire restrictions. Check weather.gov/reno for
updates and livingwithfire.info for preparedness tips.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Reno NV
737 AM PDT Fri Aug 21 2026
NVZ420-221445-
/O.NEW.KREV.FW.W.0009.260822T1800Z-260823T0600Z/
Northern Sierra Front including Carson City, Douglas, Storey,
Southern Washoe, Western Lyon, and Far Southern Lassen Counties-
737 AM PDT Fri Aug 21 2026
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM PDT SATURDAY
FOR GUSTY WINDS AND LOW HUMIDITY FOR THE NORTHERN SIERRA FRONT...
The National Weather Service in Reno has issued a Red Flag Warning
for gusty winds and low humidity, which is in effect from 11 AM
to 11 PM PDT Saturday.
* Affected Area...Fire Weather Zone 420 Northern Sierra Front
including Carson City, Douglas, Storey, Southern Washoe,
Western Lyon, and Far Southern Lassen Counties.
* Winds...Southwest 15 to 25 mph with gusts up to 40 mph.
* Humidity...As low as 18 percent.
* Duration...3 to 6 hours.
* Impacts...The combination of gusty winds and low humidity can
cause fire to rapidly grow in size and intensity before first
responders can contain them.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Avoid outdoor activities that can cause a spark near dry
vegetation, such as yard work, target shooting, or campfires.
Follow local fire restrictions. Check weather.gov/reno for
updates and livingwithfire.info for preparedness tips.
&&
$$
http://weather.gov/reno
