375
WWUS86 KPQR 011010
RFWPQR

URGENT - FIRE WEATHER MESSAGE
National Weather Service Portland OR
310 AM PDT Mon Sep 1 2025

ORZ689-690-020200-
/O.CON.KPQR.FW.A.0003.250902T2100Z-250903T0300Z/
Northern Willamette National Forest-
Southern Willamette National Forest-
310 AM PDT Mon Sep 1 2025

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON
THROUGH TUESDAY EVENING 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 15 to 25% chance of thunderstorms.

* 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.

* 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 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