557  
FNUS76 KPDT 211557  
FWSPDT  
 
SPOT FORECAST FOR BIRD TRACK 634...USFS  
NATIONAL WEATHER SERVICE PENDLETON OR  
857 AM PDT THU OCT 21 2021  
 
FORECAST IS BASED ON IGNITION TIME OF 0900 PDT ON OCTOBER 21.  
***THUNDERSTORMS IMPLY GUSTY AND ERRATIC WINDS***  
***WINDS ARE 20 FOOT 10-MINUTE AVERAGES***  
***CWR-CHANCE OF WETTING RAIN 0.10 OR GREATER***  
 
IF YOU HAVE QUESTIONS OR CONCERNS WITH THIS FORECAST, PLEASE  
CONTACT OUR OFFICE AT (541) 276-8134.  
   
DISCUSSION
 
HIGH PRESSURE OVER THE REGION TODAY IS MOVING EAST  
AND WILL ALLOW A COLD FRONT TO MOVE INTO THE AREA EARLY FRIDAY.  
WILL SEE CONTINUED SOUTHERLY WINDS THROUGH EARLY FRIDAY AND THEN  
SWITCH TO WEST POST FRONTAL PASSAGE. THE CHANCE OF RAIN WILL  
INCREASE LATE TONIGHT THROUGH EARLY FRIDAY WITH A HIGH  
LIKELIHOOD OF WETTING RAIN FRIDAY WITH PRECIPITATION AMOUNTS OF  
HALF AND INCH OF MORE.  
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY SUNNY (30-50 PERCENT).  
CWR.................0 PERCENT.  
MAX TEMPERATURE.....AROUND 70.  
MIN HUMIDITY........28-33 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 5 TO 8 MPH.  
RIDGETOP WIND.......SOUTH 6 TO 12 MPH.  
MIXING HEIGHT.......5000 FT AGL LATE IN THE MORNING.  
TRANSPORT WINDS.....SOUTH AROUND 15 MPH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). CHANCE OF RAIN  
AFTER MIDNIGHT.  
CWR.................5 PERCENT.  
MIN TEMPERATURE.....43-46.  
MAX HUMIDITY........85-90 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 5 TO 8 MPH.  
RIDGETOP WIND.......SOUTH 6 TO 12 MPH.  
MIXING HEIGHT.......5000 FT AGL EARLY IN THE EVENING THEN 500 FT  
AGL OVERNIGHT.  
TRANSPORT WINDS.....SOUTHEAST AROUND 10 MPH.  
   
FRIDAY
 
 
SKY/WEATHER.........CLOUDY (95-100 PERCENT). RAIN.  
CWR.................90 PERCENT.  
MAX TEMPERATURE.....53-56.  
MIN HUMIDITY........60-69 PERCENT.  
WIND (20 FT)........SOUTH WINDS 5 TO 8 MPH SWITCHING TO WEST IN  
THE AFTERNOON.  
RIDGETOP WIND.......SOUTH 6 TO 12 MPH SWITCHING TO WEST IN THE  
AFTERNOON.  
MIXING HEIGHT.......2000 FT AGL.  
TRANSPORT WINDS.....WEST AROUND 10 MPH.  
 

 
FORECASTER...SOLOMON  
REQUESTED BY...MIKE JOHNSON  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2119882.0/PDT  
.DELDT 10/21/21  
.FORMATTERVERSION 2.0.0  
.EMAIL MICHAEL.V.JOHNSON@USDA.GOV  
 
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