Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
807 AM PDT Wed Sep 3 2025
CAZ285-ORZ617-623>625-040400-
/O.CON.KMFR.FW.W.0024.000000T0000Z-250904T0400Z/
Modoc County Except for the Surprise Valley-
Umpqua National Forest-Southern Oregon Cascades-
Klamath Basin and the Fremont-Winema National Forest-
South Central Oregon Desert including the BLM Land in Eastern
Lake and Western Harney Counties-
807 AM PDT Wed Sep 3 2025
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING
FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 285,
617, 623, 624, AND 625...
* AFFECTED AREA...In California, Fire weather zone 285. In
Oregon, Fire weather zones 617, 623, 624 and 625.
* THUNDERSTORMS...Scattered thunderstorms with abundant
lightningpossible. Storms may produce little or no rain, and
lightning strikes outside of precipitation cores are
possible, and may cause many new fire starts. Thunderstorms
are expected to continue overnight and through Wednesday
afternoon along and east of the Cascades.
* OUTFLOW WINDS...Gusts of 35 to 50 mph could travel outward up
to 25 miles from thunderstorm cores.
* ADDITIONAL DETAILS...In addition to thunderstorm potential,
conditions on Tuesday will be hot, dry, breezy, and unstable,
adding to the heightened fire weather concerns for the day.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?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.
&&
$$
Visit us at www.weather.gov/Medford
URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
355 AM PDT Wed Sep 3 2025
WAZ658-659-032200-
/O.CON.KSEW.FW.W.0004.250903T1900Z-250904T0400Z/
West Slopes of the North Cascades Generally above 1500 Feet-
West Slopes of the Central Cascades Generally above 1500 Feet-
355 AM PDT Wed Sep 3 2025
...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM PDT
THIS EVENING FOR HOT, DRY AND UNSTABLE CONDITIONS FOR FIRE
WEATHER ZONES 658 AND 659...
* AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North
Cascades Generally above 1500 Feet and Fire Weather Zone 659
West Slopes of the Central Cascades Generally above 1500 Feet.
* RELATIVE HUMIDITY...As low as 25 percent.
* TEMPERATURES...Up to 90 degrees.
* STABILITY...Unstable conditions can be expected.
* IMPACTS...A dry and unstable air mass with warm temperatures
can contribute to active fire behavior. In western Washington,
significant growth on existing fires takes place under such
conditions. If a fire were to begin, air quality may diminish
in the surrounding area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either imminent or occurring now. Any fires that develop will
likely spread quickly. Outdoor burning is not recommended.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Portland OR
320 AM PDT Wed Sep 3 2025
ORZ689-690-040400-
/O.CON.KPQR.FW.W.0006.000000T0000Z-250904T0400Z/
Northern Willamette National Forest-
Southern Willamette National Forest-
320 AM PDT Wed Sep 3 2025
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING
FOR THUNDERSTORMS FOR FIRE WEATHER ZONES 689 AND 690...
* AFFECTED AREA...In Oregon, Fire Weather Zone 689 Northern
Willamette National Forest and Fire Weather Zone 690 Southern
Willamette National Forest.
* THUNDERSTORMS...A 15 to 25% chance of dry thunderstorms. Storms
may produce very little rainfall, increasing the risk fo new
fire starts from dry lightning.
* OUTFLOW WINDS...Instantaneous gusts as high as 40 mph. Gusts at
these speeds can be observed tens of miles away from the core of
the thunderstorm.
* DRY AND UNSTABLE...Unstable conditions with elevated mixing
heights may promote pyroconvective activity over ongoing fires.
* IMPACTS...Conditions will be favorable for rapid fire spread
which may threaten life and property. Thunderstorm outflow
winds may result in unanticipated erratic fire spread. High
instability may result in fire growth. Frequent lightning and
critically dry fuels may result in new fire starts.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of the
above conditions can contribute to extreme fire behavior.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Portland OR
320 AM PDT Wed Sep 3 2025
ORZ688-040400-
/O.CON.KPQR.FW.W.0006.250903T1900Z-250904T0400Z/
Mt. Hood National Forest Region-
320 AM PDT Wed Sep 3 2025
...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM PDT
THIS EVENING FOR THUNDERSTORMS FOR FIRE WEATHER ZONE 688...
* AFFECTED AREA...In Oregon, Fire Weather Zone 688 Mt. Hood
National Forest Region.
* THUNDERSTORMS...A 15 to 20% chance of dry thunderstorms. Storms
may produce very little rainfall, increasing the risk of new
fire starts from dry lightning.
* OUTFLOW WINDS...Instantaneous gusts as high as 40 mph. Gusts at
these speeds can be observed tens of miles away from the core of
the thunderstorm.
* DRY AND UNSTABLE...Unstable conditions with elevated mixing
heights may promote pyroconvective activity over ongoing fires.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. Thunderstorm outflow
winds may result in unanticipated erratic fire spread. High
instability may result in fire growth. Frequent lightning and
critically dry fuels may result in new fire starts.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of the
above conditions can contribute to extreme fire behavior.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Portland OR
320 AM PDT Wed Sep 3 2025
WAZ634-635-040400-
/O.CON.KPQR.FW.W.0006.250903T1900Z-250904T0400Z/
Southern Gifford Pinchot National Forest-
Mt. Adams Ranger District of the Gifford-Pinchot National Forest-
320 AM PDT Wed Sep 3 2025
...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM PDT
THIS EVENING FOR DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER
ZONES 634 AND 635...
* AFFECTED AREA...In Washington, Fire Weather Zone 634 Southern
Gifford Pinchot National Forest and Fire Weather Zone 635 Mt.
Adams Ranger District of the Gifford Pinchot National Forest.
* DRY AND UNSTABLE...Unstable conditions with elevated mixing
heights may promote pyroconvective activity over ongoing fires.
Relative humidities as low as 20%. Temperatures up to 90 to 95
degrees.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. High instability may
result in fire growth.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of the
above conditions can contribute to extreme fire behavior.
&&
$$
For more information visit: https://www.weather.gov/portland
URGENT - FIRE WEATHER MESSAGE
National Weather Service Spokane WA
832 PM PDT Tue Sep 2 2025
WAZ699>702-040000-
/O.EXB.KOTX.FW.W.0016.250903T1900Z-250905T0400Z/
Okanogan Highlands and Kettle Mountains (Zone 699)-
Selkirk Mountains of Northeast Washington (Zone 700)-
Foothills of Northeast Washington (Zone 701)-
Colville Reservation (Zone 702)-
832 PM PDT Tue Sep 2 2025
...RED FLAG WARNING IN EFFECT FROM NOON WEDNESDAY TO 9 PM PDT
THURSDAY FOR HOT, DRY, UNSTABLE CONDITIONS FOR FIRE WEATHER ZONES
699, 700, 701, AND 702...
The National Weather Service in Spokane has issued a Red Flag
Warning for unstable thermal trough, which is in effect from noon
Wednesday to 9 PM PDT Thursday.
* Affected Area: Okanogan Highlands and Kettle Mountains (Zone
699), Selkirk Mountains of Northeast Washington (Zone 700),
Foothills of Northeast Washington (Zone 701) and Colville
Reservation (Zone 702).
* Winds: Terrain driven winds 2 to 5 mph becoming northwest to
north overnight 3 to 7 mph.
* Relative Humidities: Minimum 10 to 18 percent. Humidity
recoveries on midslopes within thermal belts of 25 to 35
percent.
* Temperatures: 97 to 103 valleys. 85 to 90 mountains.
* Impacts: Hot, dry, unstable conditions will lead to the
potential for rapid fire growth on new or existing fires.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now....or will shortly. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Spokane WA
832 PM PDT Tue Sep 2 2025
WAZ696-040000-
/O.CON.KOTX.FW.W.0016.000000T0000Z-250905T0400Z/
East Washington Central Cascades (Zone 696)-
832 PM PDT Tue Sep 2 2025
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THURSDAY FOR
UNSTABLE THERMAL TROUGH FOR FIRE WEATHER ZONE 696...
* Affected Area: East Washington Central Cascades (Zone 696).
* Winds: Terrain driven winds 3 to 6 mph becoming northwest 5 to
10 mph overnight.
* Relative Humidities: 12 to 19 percent. Humidity
recoveries on midslopes within thermal belts of 25 to 35 percent.
* Temperatures: 97 to 102 valleys. 85 to 90 mountains.
* Impacts: Hot, dry, unstable conditions will lead to the
potential for rapid fire growth on new or existing fires.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Pendleton OR
821 PM PDT Tue Sep 2 2025
...RED FLAG WARNING ISSUED FOR ABUNDANT LIGHTNING THROUGH
WEDNESDAY EVENING FOR THE SOUTHERN DESCHUTES NATIONAL FOREST...
ORZ705-040300-
/O.CON.KPDT.FW.W.0017.000000T0000Z-250904T0300Z/
Southern Deschutes National Forest-
821 PM PDT Tue Sep 2 2025
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY
FOR ABUNDANT LIGHTNING FOR FIRE WEATHER ZONE OR705...
* AFFECTED AREA...Fire Weather Zone 705 Southern Deschutes
National Forest.
* TIMING...Until 8 PM PDT Wednesday.
* IMPACTS...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
* THUNDERSTORMS...Isolated to scattered storms (confidence 25-
35%).
* OUTFLOW WINDS...Gusts as high as 40 mph.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.
&&
$$
