232
WWUS86 KPQR 021055
RFWPQR

URGENT - FIRE WEATHER MESSAGE
National Weather Service Portland OR
355 AM PDT Tue Sep 2 2025

ORZ689-690-030000-
/O.EXT.KPQR.FW.W.0006.250902T2100Z-250904T0400Z/
Northern Willamette National Forest-
Southern Willamette National Forest-
355 AM PDT Tue Sep 2 2025

...RED FLAG WARNING NOW IN EFFECT FROM 2 PM THIS AFTERNOON TO
9 PM PDT WEDNESDAY FOR THUNDERSTORMS AND UNSTABLE CONDITIONS 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 20 to 30% chance of 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.

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.

&&

$$

ORZ688-WAZ634-635-030000-
/O.NEW.KPQR.FW.A.0004.250903T1900Z-250904T0400Z/
Mt. Hood National Forest Region-
Southern Gifford Pinchot National Forest-
Mt. Adams Ranger District of the Gifford-Pinchot National Forest-
355 AM PDT Tue Sep 2 2025

...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
WEDNESDAY EVENING FOR THUNDERSTORMS AND UNSTABLE CONDITIONS FOR
FIRE WEATHER ZONES 634, 635, AND 688...

The National Weather Service in Portland has issued a Fire
Weather Watch for thunderstorms, which is in effect from
Wednesday afternoon through Wednesday evening.

* AFFECTED AREA...In Oregon, Fire Weather Zone 688 Mt. Hood
  National Forest Region. 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.

* THUNDERSTORMS...A 10-25% chance of 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 Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$

For more information visit: https://www.weather.gov/portland