145   
WWUS86 KSEW 220920  
RFWSEW  
  
URGENT - FIRE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE SEATTLE WA  
220 AM PDT FRI AUG 22 2025  
  
WAZ658-659-230000-  
/O.CON.KSEW.FW.A.0002.250823T1800Z-250825T0300Z/  
WEST SLOPES OF THE NORTH CASCADES GENERALLY ABOVE 1500 FEET-  
WEST SLOPES OF THE CENTRAL CASCADES GENERALLY ABOVE 1500 FEET-  
220 AM PDT FRI AUG 22 2025  
  
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY MORNING  
THROUGH SUNDAY 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 15 PERCENT.  
  
* TEMPERATURES...UP TO 90 TO 100.   
  
* 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 FIRE WEATHER WATCH MEANS THAT THERE IS A POTENTIAL FOR CRITICAL  
FIRE WEATHER CONDITIONS TO DEVELOP. MONITOR THE FORECASTS FOR  
POSSIBLE RED FLAG WARNINGS.  
  
  
  
  
  
WAZ661-230000-  
/O.CON.KSEW.FW.A.0002.250823T1800Z-250824T0400Z/  
EAST PORTION OF THE OLYMPIC MOUNTAINS-  
220 AM PDT FRI AUG 22 2025  
  
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY MORNING  
THROUGH SATURDAY EVENING FOR HOT, DRY AND UNSTABLE CONDITIONS FOR  
FIRE WEATHER ZONE 661...  
  
* AFFECTED AREA...FIRE WEATHER ZONE 661 EAST PORTION OF THE   
  OLYMPIC MOUNTAINS.  
  
* RELATIVE HUMIDITY...AS LOW AS 20-25 PERCENT.  
  
* TEMPERATURES...UP TO 90.  
  
* 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 FIRE WEATHER WATCH MEANS THAT THERE IS A POTENTIAL FOR CRITICAL  
FIRE WEATHER CONDITIONS TO DEVELOP. MONITOR THE FORECASTS FOR  
POSSIBLE RED FLAG WARNINGS.  
  
  
  
  
 
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