402
FNUS76 KPDT 011759
FWSPDT

Spot Forecast for Mill Canyon RX...WA DNR
National Weather Service Pendleton OR
959 AM PST Mon Dec 1 2025

Forecast is based on ignition time of 1000 PST on December 01.
***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...High pressure today will make for light winds and
poor ventilation, before a frontal system arrives overnight
tonight and introduces better ventilation winds for the daytime
hours Tuesday. This system is not anticipated to bring any
impactful precipitation for the site, however light rain and snow
may fall at times, with the best chances being during the
overnight hours. Winds will generally flow out of the west and
northwest.

.TODAY...

Sky/weather.........Mostly cloudy (60-70 percent). Slight chance of
                    snow in the morning (15-20 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 40.
Min humidity........56-61 percent.
Wind (20 ft)........West-Northwest winds 5 to 8 mph.
Ridgetop wind.......West-Northwest winds 5 to 10 mph.
Mixing height.......Near-surface.
Transport winds.....West-Northwest 8 to 12 mph.
Ventilation Index...Poor (30).

TIME (PST)      10 AM  NOON   2 PM   4 PM   6 PM   8 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............33     35     36     34     32     31
RH..............62     66     71     81     84     87
20 ft wind......W 4    W 4    W 4    W 4    W 4    W 5
20 ft wind gust.6      6      6      7      7      10

.TONIGHT...

Sky/weather.........Mostly cloudy (45-55 percent). Slight chance of
                    rain and snow in the evening and overnight
                    (20-30 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....29-32.
Max humidity........82-87 percent.
Wind (20 ft)........West-Northwest winds 5 to 8 mph.
Ridgetop wind.......West-Northwest winds 6 to 12 mph.
Mixing height.......Near-surface.
Transport winds.....West-Northwest 10 to 15 mph.
Ventilation Index...Poor (30).

.TUESDAY...

Sky/weather.........Partly cloudy (30-40 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 40.
Min humidity........69-74 percent.
Wind (20 ft)........Northwest winds 5 to 8 mph.
Ridgetop wind.......Northwest winds 10 to 15 mph.
Mixing height.......1600 ft AGL.
Transport winds.....Northwest 12 to 20 mph.
Ventilation Index...Poor to fair (30-210).

$$
Forecaster...Evans
Requested by...Isabel Casillas
Type of request...PRESCRIBED
.TAG 2526755.0/PDT
.DELDT 12/01/25
.FormatterVersion 2.0.0
.EMAIL Isabel.Casillas@dnr.wa.gov