503
FNUS76 KPDT 030017
FWSPDT

Spot Forecast for Klickitat Canyon Rx...Washington DNR
National Weather Service Pendleton OR
417 PM PST Mon Nov 2 2026

Forecast is based on ignition time of 1600 PST on November 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 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...Winds will be light and terrain/diurnally driven
tonight and tomorrow as high pressure moves out of the area and
a weak upper system passes to the south. RH recovery tonight will
be good, with afternoon RHs in the upper 50s tomorrow. Low level
inversion will develop shortly after sunset this evening and
tomorrow evening. Low level inversion is expected to lift around
10AM, but mid level inversion will keep mixing heights below
2kft AGL, limiting ventilation potential to low tomorrow.

.REST OF TODAY...

Sky/weather.........Cloudy (85-95 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 60.
Min humidity........41-46 percent.
Wind (20 ft)........Light winds.
Ridgetop wind.......Light winds.
Mixing height.......600 ft AGL.
Transport winds.....Light winds.
Ventilation Index...Low (30).

TIME (PST)      4 PM   6 PM   8 PM   10 PM  MIDNGT 2 AM
Chc of ltng (%).0      0      0      0      0      0
Temp............53     46     43     40     40     40
RH..............64     76     80     84     79     79
20 ft wind......SE 3   SE 3   W 3    N 4    N 5    N 4
20 ft wind gust.

.TONIGHT...

Sky/weather.........Cloudy (85-95 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....Around 40.
Max humidity........73-78 percent.
Wind (20 ft)........Light winds becoming north 4 to 7 mph around
10PM, then becoming light winds again around
4AM.
Ridgetop wind.......Light winds becoming north winds 5 to 8 mph
around 10PM.
Mixing height.......600 ft AGL early in the evening.
Transport winds.....Light winds becoming northeast 5 to 6 mph.
Ventilation Index...Low (30).

.TUESDAY...

Sky/weather.........Cloudy (90-100 percent) then becoming partly
                    sunny (45-55 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....56-59.
Min humidity........57-62 percent.
Wind (20 ft)........Light winds becoming southeast winds 4 to 7 mph
after 11AM.
Ridgetop wind.......North winds 4 to 7 mph shifting to the south
around 9AM.
Mixing height.......1900 ft AGL in the morning and early afternoon.
Transport winds.....Northeast 5 to 6 mph early in the morning
                    becoming light, then becoming east around 5 mph
                    early in the afternoon becoming light.
Ventilation Index...Low (30-60).

$$
Forecaster...Lawhorn
Requested by...Adam Lieberg
Type of request...PRESCRIBED
.TAG 2625101.0/PDT
.DELDT 11/02/26
.FormatterVersion 2.0.0
.EMAIL alieberg@columbialandtrust.org