536  
FNUS76 KPDT 021420  
FWSPDT  
 
SPOT FORECAST FOR SLOUGH 1 WEST...USFWS  
NATIONAL WEATHER SERVICE PENDLETON OR  
620 AM PST MON MAR 2 2026  
 
FORECAST IS BASED ON IGNITION TIME OF 0700 PST ON MARCH 02.  
***THUNDERSTORMS IMPLY GUSTY AND ERRATIC WINDS***  
***WINDS ARE 20 FOOT 10-MINUTE AVERAGES***  
***CWR-CHANCE OF WETTING RAIN 0.10 OR GREATER***  
***VENTILATION INDEX IS DERIVED FROM THE  
TRANSPORT WIND MULTIPLIED BY THE MIXING  
HEIGHT IN 100'S OF FEET. INDEX CATEGORIES  
ARE A GENERALIZED INDICATOR ONLY.***  
 
IF YOU HAVE QUESTIONS OR CONCERNS WITH THIS FORECAST, PLEASE  
CONTACT OUR OFFICE AT (541) 276-8134.  
   
DISCUSSION  
CONDITIONS WILL REMAIN DRY AT THE BURN SITE THROUGH  
TUESDAY AFTERNOON, WITH INCREASING CHANCES FOR RAIN TUESDAY NIGHT.  
WINDS WILL REMAIN LIGHT TODAY, AND WILL INCREASE OUT OF THE SOUTHWEST  
TUESDAY AS A FRONTAL SYSTEM APPROACHES THE BURN SITE. VENTILATION  
WILL GENERALLY REMAIN POOR WITH FAIRLY LOW MIXING HEIGHTS.  
   
REST OF TODAY  
 
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).  
CWR.................0 PERCENT.  
CHANCE OF LIGHTNING.0 PERCENT.  
MAX TEMPERATURE.....60-63.  
MIN HUMIDITY........40-45 PERCENT.  
WIND (20 FT)........SOUTH WINDS 5 TO 8 MPH.  
MIXING HEIGHT.......2800 FT AGL.  
TRANSPORT WINDS.....LIGHT WINDS BECOMING SOUTHWEST 5 TO 6 MPH IN  
THE LATE MORNING AND AFTERNOON.  
VENTILATION INDEX...POOR (30-110) INCREASING TO POOR (60-110) IN  
THE AFTERNOON.  
 
TIME (PST) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM  
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............37 40 45 49 52 54 57 58 59 60 58 55  
RH..............84 79 71 61 56 53 48 46 46 45 50 58  
20 FT WIND DIR..S S S SW SW SW S S S S S S  
20 FT WIND SPD..5 5 5 6 6 6 7 7 7 7 7 7  
20 FT WIND GUST.6 6 6  
   
TONIGHT  
 
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (50-60 PERCENT).  
CWR.................0 PERCENT.  
CHANCE OF LIGHTNING.0 PERCENT.  
MIN TEMPERATURE.....40-43.  
MAX HUMIDITY........80-85 PERCENT.  
WIND (20 FT)........SOUTH TO SOUTHEAST WINDS 5 TO 8 MPH WITH GUSTS  
TO 13 MPH.  
MIXING HEIGHT.......500 FT AGL.  
TRANSPORT WINDS.....SOUTH 6 TO 10 MPH.  
VENTILATION INDEX...POOR (50-60).  
   
TUESDAY  
 
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT).  
CWR.................0 PERCENT.  
CHANCE OF LIGHTNING.1 PERCENT.  
MAX TEMPERATURE.....63-66.  
MIN HUMIDITY........48-53 PERCENT.  
WIND (20 FT)........SOUTH WINDS 5 TO 8 MPH SHIFTING TO THE WEST TO  
SOUTHWEST 6 TO 12 MPH IN THE AFTERNOON WITH GUSTS  
TO 20 MPH.  
MIXING HEIGHT.......2700 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 9 TO 15 MPH SHIFTING TO THE WEST  
AROUND 15 MPH LATE IN THE AFTERNOON.  
VENTILATION INDEX...POOR TO FAIR (50-240) INCREASING TO FAIR  
(200-240) IN THE AFTERNOON.  
 
 
FORECASTER...NWS SEATTLE  
REQUESTED BY...THOMAS BOGGS  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2604101.3/PDT  
.DELDT 03/02/26  
.FORMATTERVERSION 2.0.0  
.EMAIL THOMAS_BOGGS@FWS.GOV  
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