828
FNUS76 KPDT 201857
FWSPDT
SPOT FORECAST FOR SUN COUNTRY...SE WA TYPE 3 IMT - TEAM 3
NATIONAL WEATHER SERVICE PENDLETON OR
1157 AM PDT WED AUG 20 2025
FORECAST IS BASED ON FORECAST START TIME OF 0800 PDT ON AUGUST 21.
***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
WARMING, DRYING TOMORROW THROUGH THE WEEKEND. HOT
AND DRY WITH FAIR-POOR OVERNIGHT RECOVERY STARTING THURSDAY NIGHT
WITH WORST RECOVERY EXPECTED FRIDAY-SUNDAY. TERRAIN-DRIVEN WINDS
EARLY MORNING THURSDAY AND THURSDAY NIGHT, HOWEVER, EAST WIND
REGIME FORECAST TO TAKE HOLD AS AN UPPER-LEVEL RIDGE BUILDS LATE
THURSDAY THROUGH THE WEEKEND OVERHEAD. EAST WINDS WITH GUSTS AS
HIGH AS 10-15 MPH FRIDAY AND SATURDAY AFTERNOON/EARLY EVENING.
THURSDAY
SKY/WEATHER.........SUNNY (0-10 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....83-85.
MIN HUMIDITY........18-22 PERCENT.
WIND (20 FT)........LIGHT DRAINAGE WINDS 2 TO 4 MPH BECOMING EAST 4
TO 6 MPH BY MID-LATE MORNING.
RIDGETOP WIND.......NORTHWEST AROUND 5 MPH BECOMING SOUTHEAST BY LATE
MORNING.
MIXING HEIGHT.......6400 FT AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
VENTILATION INDEX...POOR (30) INCREASING TO FAIR (280) IN THE
AFTERNOON.
THURSDAY NIGHT
SKY/WEATHER.........CLEAR (0-10 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....54-57.
MAX HUMIDITY........41-46 PERCENT.
WIND (20 FT)........EAST WINDS AROUND 5 MPH IN THE EVENING
BECOMING LIGHT DRAINAGE WINDS 2 TO 4 MPH.
RIDGETOP WIND.......EAST WINDS AROUND 2 TO 5 MPH.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH.
VENTILATION INDEX...POOR (30) INCREASING TO POOR (50) OVERNIGHT.
FRIDAY
SKY/WEATHER.........SUNNY (0-5 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....AROUND 90.
MIN HUMIDITY........15-20 PERCENT.
WIND (20 FT)........EAST WINDS 5 TO 8 MPH.
RIDGETOP WIND.......EAST WINDS 5 TO 10 MPH.
MIXING HEIGHT.......6900 FT AGL.
TRANSPORT WINDS.....EAST AROUND 10 MPH.
VENTILATION INDEX...POOR (50) INCREASING TO GOOD (620) IN THE
AFTERNOON.
FORECASTER...TOWNSEND
REQUESTED BY...RYAN SCHARNHORST
TYPE OF REQUEST...WILDFIRE
.TAG 2520314.0/PDT
.DELDT 08/20/25
.FORMATTERVERSION 2.0.0
.EMAIL RYAN_SCHARNHORST@PULLMAN-WA.GOV
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