763 
FNUS76 KPDT 030028
FWSPDT

Spot Forecast for CATLIN...CWICC
National Weather Service Pendleton OR
528 PM PDT Tue Sep 2 2025

Forecast is based on forecast start time of 1700 PDT on September 02. 
***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.

...HEAT ADVISORY IN EFFECT UNTIL 8 PM PDT THURSDAY...

.DISCUSSION...Hot, dry weather with very low afternoon relative humidity
and poor overnight relative humidity recovery is expected through Thursday.
A slight chance of showers, and very low chance of thunder, is forecast Friday.

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent). Haze early in the 
                    evening. 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Min temperature.....69-72. 
Max humidity........28-33 percent. 
Wind (20 ft)........South-southeast winds 3-6 mph with gusts of 10-12 mph,
                    shifting to the northwest 4-8 mph with gusts of 10-12 mph
                    7-9 PM PDT. 
Ridgetop wind.......South-southeast winds 4-7 mph with gusts of 10-12 mph,
                    shifting to the northwest 6-10 mph with gusts of 10-15 mph
                    7-9 PM PDT. 
Mixing height.......3800 ft AGL early in the evening, becoming near surface
                    overnight. 
Transport winds.....South 4-7 mph shifting to the northwest 8-12 mph 7-9 PM PDT 
Ventilation Index...Poor (60) decreasing to poor (30) overnight. 

.WEDNESDAY...

Sky/weather.........Mostly sunny (20-30 percent). Haze. 
CWR.................0 percent. 
Chance of lightning.2 percent. 
Max temperature.....95-98. 
Min humidity........9-14 percent. 
Wind (20 ft)........Northwest winds 4-8 mph early morning, becoming upslope
                    then upvalley 3-6 mph with gusts up to 10 mph by 8-10 AM
                    PDT. 
Ridgetop wind.......Northwest winds 6-10 mph early morning, becoming upslope
                    then upvalley 4-7 mph with gusts up to 12 mph by 8-10 AM
                    PDT. 
Mixing height.......Increasing to 11000-11500 ft AGL by early afternoon. 
Transport winds.....Northwest 8-12 mph early morning, shifting to the east to 
                    northeast 4-6 mph late morning, then shifting to the northwest
                    5-8 mph 7-9 PM PDT. 
Ventilation Index...Poor (50) increasing to fair (370) in the 
                    afternoon. 

$$
Forecaster...Plunkett
Requested by...CWICC
Type of request...WILDFIRE
.TAG 2521157.0/PDT
.DELDT 09/02/25
.FormatterVersion 2.0.0
.EMAIL wacwc@firenet.gov,edson.amezcua@dnr.wa.gov