561
FNUS76 KPDT 041508
FWSPDT
SPOT FORECAST FOR MELOY RX...WA DNR
NATIONAL WEATHER SERVICE PENDLETON OR
808 AM PDT SUN OCT 4 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 PDT 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
HIGH PRESSURE WILL REMAIN OVER THE BURN AREA TODAY
WITH DIURNALLY/TERRAIN DRIVEN WINDS LESS THAN 10 MPH. TOMORROW,
A WEAK SYSTEM PASSING TO THE NORTH WILL RESULT IN NORTHWEST TO
NORTH WINDS BETWEEN 5 TO 10 MPH, WITH A FEW GUSTS TO AROUND 17 MPH
IN THE AFTERNOON. AFTERNOON RHS WILL BE IN THE LOW 30S TODAY AND
IN THE LOW 20S TOMORROW. OVERNIGHT RECOVERY WILL BE GOOD. MID LEVEL
INVERSION WILL LIMIT MIXING HEIGHTS TO BELOW 3KFT AGL TODAY, WITH
LOW LEVEL INVERSION EXPECTED TO DEVELOP AROUND 7PM THIS EVENING, THEN
LIFT AROUND 10AM TOMORROW MORNING.
REST OF TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....AROUND 80.
MIN HUMIDITY........30-35 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 3 TO 6 MPH SHIFTING TO THE
SOUTHEAST 5 TO 8 MPH AROUND 11AM.
RIDGETOP WIND.......NORTHWEST WINDS 4 TO 7 MPH SHIFTING TO THE
SOUTHEAST 6 TO 12 MPH.
MIXING HEIGHT.......2700 FT AGL.
TRANSPORT WINDS.....LIGHT WINDS BECOMING SOUTH 5 TO 7 MPH LATE IN
THE MORNING.
VENTILATION INDEX...LOW (30) INCREASING TO LOW (130) IN THE
AFTERNOON.
TIME (PDT) 9 AM 11 AM 1 PM 3 PM 5 PM 7 PM
CHC OF LTNG (%).0 0 0 0 0 0
TEMP............51 64 73 76 75 70
RH..............62 44 36 34 36 48
20 FT WIND......NW 3 SE 5 SE 6 SE 7 SE 7 S 4
20 FT WIND GUST.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....51-54.
MAX HUMIDITY........58-63 PERCENT.
WIND (20 FT)........SOUTH WINDS 4 TO 7 MPH SHIFTING TO THE
NORTHWEST AFTER 8PM.
RIDGETOP WIND.......SOUTHEAST WINDS 5 TO 10 MPH SHIFTING TO THE
NORTHWEST 5 TO 8 MPH AROUND 9PM.
MIXING HEIGHT.......1000 FT AGL EARLY IN THE EVENING THEN 500 FT
AGL LATE IN THE EVENING.
TRANSPORT WINDS.....SOUTH AROUND 5 MPH SHIFTING TO THE WEST 6 TO 13
MPH EARLY IN THE EVENING.
VENTILATION INDEX...LOW (30) INCREASING TO LOW (40) OVERNIGHT.
MONDAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT) THEN BECOMING
MOSTLY CLOUDY (70-80 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....AROUND 80.
MIN HUMIDITY........21-26 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 8 MPH SHIFTING TO THE NORTH
AROUND 12PM.
RIDGETOP WIND.......NORTHWEST WINDS 5 TO 11 MPH SHIFTING TO THE NORTH
AROUND 12PM.
MIXING HEIGHT.......3800 FT AGL.
TRANSPORT WINDS.....NORTHWEST 8 TO 13 MPH.
VENTILATION INDEX...LOW (60) INCREASING TO MODERATE (230) IN THE
AFTERNOON.
FORECASTER...LAWHORN
REQUESTED BY...CARSON ZEPP
TYPE OF REQUEST...PRESCRIBED
.TAG 2623036.0/PDT
.DELDT 10/04/26
.FORMATTERVERSION 2.0.0
.EMAIL CARSON.ZEPP@DNR.WA.GOV
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