465
FNUS76 KPDT 210005
FWSPDT
SPOT FORECAST FOR HORSEFLY 605...USDA USFS
NATIONAL WEATHER SERVICE PENDLETON OR
505 PM PDT SUN SEP 20 2026
FORECAST IS BASED ON IGNITION TIME OF 1700 PDT ON SEPTEMBER 20.
***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 TRANSPORT WIND
MULTIPLIED BY THE MIXING HEIGHT IN 100'S OF FT.
CATEGORIES ARE A GENERALIZED INDICATOR ONLY:
LOW (< 200), MODERATE (200-500), HIGH (500-700),
AND VERY HIGH (> 700). ***
IF YOU HAVE QUESTIONS OR CONCERNS WITH THIS FORECAST, PLEASE
CONTACT OUR OFFICE AT (541) 276-8134.
DISCUSSION
DRY AND WARMING CONDITIONS WILL PERSIST OVER THE
FIRE THROUGH THE FORECAST PERIOD. RELATIVE HUMIDITY WILL BE IN
THE LOW TO MID 20% WITH LIGHT WINDS SHIFTING TO THE SOUTH 5 TO
7 AFTER 2200. OVERNIGHT RECOVERIES WILL BE IN THE MID TO UPPER
50% WITH SOUTH WINDS CONTINUING THROUGH 0800 MONDAY BEFORE
BECOMING LIGHT AGAIN. MONDAY WILL SEE RELATIVE HUMIDITY IN THE
LOW TO MID 20%.
REST OF TODAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....75-78.
MIN HUMIDITY........23-28 PERCENT.
WIND (20 FT)........LIGHT WINDS.
RIDGETOP WIND.......NORTH WINDS 5 TO 7 MPH.
MIXING HEIGHT.......2600 FT AGL.
TRANSPORT WINDS.....EAST AROUND 8 MPH.
VENTILATION INDEX...LOW (90).
TIME (PDT) 5PM 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............74 71 67 61 58 56 55 55 54 54 53 52
RH..............29 36 43 52 59 61 61 60 60 59 59 59
20 FT WIND DIR..NE N N N N S S S S S S S
20 FT WIND SPD..4 2 2 2 2 3 5 5 5 5 5 5
20 FT WIND GUST.7 4 4 6 6
TONIGHT
SKY/WEATHER.........CLEAR (0-10 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....51-54.
MAX HUMIDITY........56-61 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH 5 TO 7 MPH AFTER
2200.
RIDGETOP WIND.......NORTH WINDS 5 TO 7 MPH BECOMING SOUTH 7 TO 9
MPH AFTER 2200.
MIXING HEIGHT.......2600 FT AGL EARLY IN THE EVENING.
TRANSPORT WINDS.....EAST 7 TO 8 MPH SHIFTING TO THE SOUTH AROUND 8
MPH LATE IN THE EVENING.
VENTILATION INDEX...LOW (90) DECREASING TO LOW (30) OVERNIGHT.
MONDAY
SKY/WEATHER.........SUNNY (10-20 PERCENT) THEN BECOMING PARTLY
SUNNY (50-60 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....79-82.
MIN HUMIDITY........21-26 PERCENT.
WIND (20 FT)........SOUTH WINDS 5 TO 7 MPH THROUGH 0800 THEN
BECOMING LIGHT.
RIDGETOP WIND.......SOUTH WINDS 7 TO 9 MPH THROUGH 0800 BECOMING
VARIABLE 5 TO 7 MPH.
MIXING HEIGHT.......7700 FT AGL EARLY IN THE MORNING.
TRANSPORT WINDS.....SOUTH 6 TO 8 MPH SHIFTING TO THE NORTH AROUND 6
MPH LATE IN THE AFTERNOON.
VENTILATION INDEX...LOW (50) INCREASING TO MODERATE (360) IN THE
AFTERNOON.
FORECASTER...BENNESE
REQUESTED BY...WBARR
TYPE OF REQUEST...PRESCRIBED
.TAG 2622205.0/PDT
.DELDT 09/20/26
.FORMATTERVERSION 2.0.0
.EMAIL WILLIAM.BARR@USDA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page