440
FNUS76 KPDT 030941
FWSPDT
SPOT FORECAST FOR MARSHALL DEVINE RX...BURNS INTERAGENCY COMMUNICATION CENTER
NATIONAL WEATHER SERVICE PENDLETON OR
241 AM PDT SAT OCT 3 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 MDT ON OCTOBER 03.
***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
THE WIND WILL BE LIGHT OUT OF THE SOUTHEAST (UNDER 10 MPH). AFTERNOON
MIN RELATIVE HUMIDITY NEAR 15% BEGINS A RECOVERY THIS EVENING THAT
SHOULD REACH ABOUT 45% OVERNIGHT. THERE IS NO RISK FOR DRY THUNDER.
TODAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....AROUND 80.
MIN HUMIDITY........13-18 PERCENT.
WIND (20 FT)........LIGHT WINDS EARLY IN THE MORNING BECOMING
SOUTHEAST 5 TO 8 MPH, THEN SHIFTING TO THE
SOUTH LATE IN THE AFTERNOON BECOMING LIGHT.
RIDGETOP WIND.......LIGHT WINDS EARLY IN THE MORNING BECOMING
SOUTHEAST 5 TO 8 MPH, THEN SHIFTING TO THE
SOUTH LATE IN THE AFTERNOON BECOMING LIGHT.
MIXING HEIGHT.......4500 FT AGL.
TRANSPORT WINDS.....EAST AROUND 8 MPH SHIFTING TO THE SOUTH 6 TO 10
MPH LATE IN THE MORNING.
VENTILATION INDEX...LOW (50) INCREASING TO MODERATE (320) IN THE
AFTERNOON.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............46 50 55 63 68 70 73 75 76 77 75 73
RH..............52 52 47 37 31 28 24 22 20 18 18 22
20 FT WIND DIR..E E SE SE SE SE SE S S S S SE
20 FT WIND SPD..4 5 5 5 6 7 7 7 6 6 4 3
20 FT WIND GUST.5 6 6 7 10 11 11 11 11 10 8 6
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....46-49.
MAX HUMIDITY........43-48 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING EAST 5 TO 7 MPH EARLY IN
THE EVENING, THEN BECOMING LIGHT OVERNIGHT.
RIDGETOP WIND.......LIGHT WINDS BECOMING EAST 5 TO 7 MPH EARLY IN
THE EVENING, THEN BECOMING LIGHT OVERNIGHT.
MIXING HEIGHT.......2000 FT AGL EARLY IN THE EVENING THEN 500 FT
AGL LATE IN THE EVENING.
TRANSPORT WINDS.....EAST 6 TO 10 MPH.
VENTILATION INDEX...LOW (80) DECREASING TO LOW (40) OVERNIGHT.
SUNDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT) THEN BECOMING PARTLY
SUNNY (60-70 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....81-84.
MIN HUMIDITY........11-16 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH 5 TO 7 MPH LATE IN
THE MORNING, THEN BECOMING LIGHT LATE IN THE
AFTERNOON.
RIDGETOP WIND.......LIGHT WINDS BECOMING SOUTH 5 TO 7 MPH LATE IN
THE MORNING, THEN BECOMING LIGHT LATE IN THE
AFTERNOON.
MIXING HEIGHT.......5100 FT AGL EARLY IN THE MORNING.
TRANSPORT WINDS.....SOUTHEAST AROUND 7 MPH SHIFTING TO THE
SOUTHWEST 8 TO 13 MPH LATE IN THE MORNING.
VENTILATION INDEX...LOW (30) INCREASING TO MODERATE (370) IN THE
AFTERNOON.
FORECASTER...RUSSELL
REQUESTED BY...R HOWES
TYPE OF REQUEST...PRESCRIBED
.TAG 2622992.0/PDT
.DELDT 10/03/26
.FORMATTERVERSION 2.0.0
.EMAIL ORBIC@FIRENET.GOV,KEVIN.PERCY@USDA.GOV,DONHAM@PATRICKFIRE.COM
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