662
FNUS76 KPDT 081852
FWSPDT
SPOT FORECAST FOR FORTH RTRL RX...BIA
NATIONAL WEATHER SERVICE PENDLETON OR
1152 AM PDT WED OCT 8 2025
FORECAST IS BASED ON IGNITION TIME OF 1200 PDT ON OCTOBER 08.
***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
LAST OBSERVATION BEFORE BURN TIME WAS 68 DEGREES WITH
A SSE WIND AROUND 5 MPH AND GUSTS AROUND 11 MPH AND
RELATIVE HUMIDITY AT 26%. LOOK FOR MINIMAL CHANGE IN
THESE CONDITIONS INTO THE EARLY AFTERNOON AS TEMPERATURES
WILL ONLY CLIMB A COUPLE OF MORE DEGREES.
REST OF TODAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.1 PERCENT.
MAX TEMPERATURE.....AROUND 70.
MIN HUMIDITY........20-25 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 7 MPH IN THE AFTERNOON
BECOMING LIGHT.
RIDGETOP WIND.......
MIXING HEIGHT.......6400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 16 MPH BECOMING SOUTH AROUND 6
MPH LATE IN THE AFTERNOON.
VENTILATION INDEX...EXCELLENT (780).
TIME (PDT) NOON 2 PM 4 PM 6 PM 8 PM 10 PM
CHC OF LTNG (%).0 0 0 0 0 0
TEMP............65 66 65 59 52 48
RH..............27 26 29 35 47 54
20 FT WIND......S 6 SW 6 SW 6 N 4 S 4 S 4
20 FT WIND GUST.13 13 13 10 6 6
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.1 PERCENT.
MIN TEMPERATURE.....44-47.
MAX HUMIDITY........50-55 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHEAST 5 TO 7 MPH LATE
IN THE EVENING.
RIDGETOP WIND.......11-15 MPH
MIXING HEIGHT.......1300 FT AGL EARLY IN THE EVENING.
TRANSPORT WINDS.....SOUTHEAST 6 TO 13 MPH.
VENTILATION INDEX...POOR (50) DECREASING TO POOR (30) OVERNIGHT.
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.1 PERCENT.
MAX TEMPERATURE.....66-69.
MIN HUMIDITY........25-30 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 5 TO 7 MPH SHIFTING TO THE
NORTHEAST LATE IN THE AFTERNOON, THEN BECOMING
LIGHT LATE IN THE AFTERNOON.
RIDGETOP WIND.......10-13 MPH
MIXING HEIGHT.......4000 FT AGL EARLY IN THE MORNING.
TRANSPORT WINDS.....SOUTH 8 TO 13 MPH SHIFTING TO THE NORTHEAST
LATE IN THE AFTERNOON.
VENTILATION INDEX...POOR (40) INCREASING TO FAIR (350) IN THE
AFTERNOON.
FORECASTER...RUSSELL
REQUESTED BY...JOSEPH WINCKLER
TYPE OF REQUEST...PRESCRIBED
.TAG 2523182.0/PDT
.DELDT 10/08/25
.FORMATTERVERSION 2.0.0
.EMAIL JOSEPH.WINCKLER@BIA.GOV
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