304
FNUS76 KPDT 040915
FWSPDT
SPOT FORECAST FOR MARSHALL DEVINE RX...BURNS INTERAGENCY COMMUNICATION CENTER
NATIONAL WEATHER SERVICE PENDLETON OR
215 AM PDT SUN OCT 4 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 MDT ON OCTOBER 04.
***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
LIGHT SOUTHWEST WINDS THIS MORNING WILL BECOME LIGHT SOUTHWEST
BY THE AFTERNOON WINDS WILL BECOME UNDER 3 MPH AND DOWN VALLEY
BY AROUND 2000. THIS AFTERNOON THE MINIMUM RELATIVE HUMIDITY
CAN BE AS LOW AS 12 PERCENT, AND THEN RECOVER OVERNIGHT TO
AROUND 40 PERCENT.
TODAY
SKY/WEATHER.........SUNNY (15-25 PERCENT) THEN BECOMING PARTLY
SUNNY (45-55 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 IN THE
LATE MORNING AND AFTERNOON, THEN BECOMING LIGHT
LATE IN THE AFTERNOON.
RIDGETOP WIND.......LIGHT WINDS BECOMING SOUTH 5 TO 7 MPH IN THE
LATE MORNING AND AFTERNOON, THEN BECOMING LIGHT
LATE IN THE AFTERNOON.
MIXING HEIGHT.......4500 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 6 TO 8 MPH SHIFTING TO THE SOUTHWEST
6 TO 12 MPH LATE IN THE MORNING.
VENTILATION INDEX...LOW (40) INCREASING TO MODERATE (290) 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............52 55 60 69 73 76 78 80 80 80 79 76
RH..............45 46 42 32 27 23 20 17 15 14 16 19
20 FT WIND DIR..SE SE S S S S S S S SW SW S
20 FT WIND SPD..4 4 4 5 6 6 6 6 6 5 4 3
20 FT WIND GUST.5 5 5 6 7 10 10 10 10 8 6 5
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING
MOSTLY CLOUDY (60-70 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....51-54.
MAX HUMIDITY........36-41 PERCENT.
WIND (20 FT)........LIGHT WINDS.
RIDGETOP WIND.......LIGHT WINDS.
MIXING HEIGHT.......1700 FT AGL EARLY IN THE EVENING THEN 500 FT
AGL LATE IN THE EVENING.
TRANSPORT WINDS.....SOUTHWEST AROUND 6 MPH SHIFTING TO THE
NORTHWEST 6 TO 8 MPH EARLY IN THE EVENING.
VENTILATION INDEX...LOW (30).
MONDAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....81-84.
MIN HUMIDITY........10-15 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING WEST 5 TO 8 MPH LATE IN
THE MORNING.
RIDGETOP WIND.......LIGHT WINDS BECOMING WEST 6 TO 10 MPH LATE IN
THE MORNING.
MIXING HEIGHT.......7600 FT AGL EARLY IN THE MORNING.
TRANSPORT WINDS.....NORTHWEST 7 TO 8 MPH SHIFTING TO THE WEST 12 TO
14 MPH LATE IN THE MORNING.
VENTILATION INDEX...LOW (40) INCREASING TO VERY HIGH (750) IN THE
AFTERNOON.
FORECASTER...RUSSELL
REQUESTED BY...R HOWES
TYPE OF REQUEST...PRESCRIBED
.TAG 2622992.1/PDT
.DELDT 10/04/26
.FORMATTERVERSION 2.0.0
.EMAIL DONHAM@PATRICKFIRE.COM,KEVIN.PERCY@USDA.GOV,ORBIC@FIRENET.GOV
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