Fire Weather Watch
...HOT, DRY, AND UNSTABLE CONDITIONS ALONG THE WASHINGTON
CASCADES TODAY...
...ISOLATED TO SCATTERED THUNDERSTORMS IN CENTRAL AND EASTERN
OREGON FRIDAY...
.Hot, dry, and unstable conditions will lead to the potential for
rapid fire growth on new and existing fires along the Washington
Cascades this afternoon and evening. Farther south, isolated to
scattered thunderstorms capable of producing abundant cloud-to-
ground lightning are forecast Friday for much of central and
eastern Oregon.
* AFFECTED AREA...Fire Weather Zones 696 John Day Valley, 697
Central Blue Mountains, 698 Southern Blue Mountains, 699
Western Forested Blue Mountains and 703 Warm Springs
Reservation.
* TIMING...From Friday afternoon through Friday evening.
* IMPACTS...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
* THUNDERSTORMS...Isolated to scattered thunderstorms capable of
producing abundant cloud-to-ground lightning and gusty outflow
winds.
* OUTFLOW WINDS...Gusts up to 50 mph.
From: Sep 05, 2025 02:34
Until: Sep 05, 2025 10:45
Red Flag Warning
* 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 20 percent.
* TEMPERATURES...Up to 85.
* 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.
From: Sep 04, 2025 05:44
Until: Sep 04, 2025 13:45
Heat Advisory
* WHAT...Afternoon high temperatures in the mid to upper 90s and
overnight low temperatures in the mid 60s to lower 70s expected.
* WHERE...Western and Central Columbia River Gorge and the Hood
River Valley.
* WHEN...Until 8 PM PDT Thursday.
* IMPACTS...Hot temperatures may cause heat illnesses.
From: Sep 03, 2025 21:30
Until: Sep 04, 2025 12:00
Red Flag Warning
* 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.
From: Sep 03, 2025 10:20
Until: Sep 04, 2025 04:00
Red Flag Warning
The National Weather Service in Portland has issued a Red Flag
Warning for thunderstorms, which is in effect from noon to 9 PM
PDT Wednesday. The Fire Weather Watch is no longer in effect.
* 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.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. High instability may
result in fire growth.
From: Sep 02, 2025 21:05
Until: Sep 03, 2025 12:00
Heat Advisory
* WHAT...Afternoon high temperatures in the mid to upper 90s and
overnight low temperatures in the mid 60s to lower 70s expected.
* WHERE...Western and Central Columbia River Gorge and the Hood
River Valley.
* WHEN...Until 9 PM PDT Wednesday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* ADDITIONAL DETAILS...Increasing high clouds may limit high
temperatures on Wednesday compared to Tuesday, however
probabilities for high temperatures above 90 degrees on Wednesday
are high, ranging from 75-95%.
From: Sep 02, 2025 20:11
Until: Sep 03, 2025 12:00
Red Flag Warning
* AFFECTED AREA...In Oregon, Fire Weather Zone 689 Northern
Willamette National Forest and Fire Weather Zone 690 Southern
Willamette National Forest.
* THUNDERSTORMS...A 20 to 30% 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 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.
From: Sep 02, 2025 21:05
Until: Sep 03, 2025 12:00
Red Flag Warning
The National Weather Service in Portland has issued a Red Flag
Warning for thunderstorms, which is in effect from noon to 9 PM
PDT Wednesday. The Fire Weather Watch is no longer in effect.
* 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.
From: Sep 02, 2025 21:05
Until: Sep 03, 2025 12:00
