597
FNUS76 KPDT 181618
FWSPDT

Spot Forecast for Liberty...Washington State Department of Natural
National Weather Service Pendleton OR
818 AM PST Tue Nov 18 2025

Forecast is based on ignition time of 0900 PST on November 18.
***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...Dry and stable conditions will persist through the
forecast period. Winds will be W 5-8 mph today through 6 PM before
switching to the NW 5-7 mph and becoming briefly light before
switching to the NE overnight at 5-7 mph continuing through Wednesday.
Daytime RHs today will be in the low to mid 70% with excellent
(90-98%) and Wednesday in the upper 60% to low 70%. There is a less
than 30% probability of the area seeing patch fog/freezing fog
Wednesday  morning. Temperatures overnight will be at or below freezing.

.REST OF TODAY...

Sky/weather.........Partly sunny (60-70 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....43-46.
Min humidity........72-77 percent.
Wind (20 ft)........West winds 5 to 8 mph through 6 PM.
Ridgetop wind.......West winds 7 to 9 mph through 6 PM.
Mixing height.......1900 ft AGL in the late morning and early
                    afternoon.
Transport winds.....West 6 to 10 mph.
Ventilation Index...Poor (30-140).

TIME (PST)      10 AM  NOON   2 PM   4 PM   6 PM   8 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............37     41     43     42     39     35
RH..............91     80     77     81     90     95
20 ft wind......W 7    W 7    W 7    W 5    W 5    NW 5
20 ft wind gust.11     11     11     10     10     7

.TONIGHT...

Sky/weather.........Mostly cloudy (50-60 percent) then becoming
                    mostly clear (10-20 percent). Patchy fog in the
                    evening. Patchy freezing fog overnight.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....29-32.
Max humidity........91-96 percent.
Wind (20 ft)........West winds around 5 mph shifting to the
                    northwest 5 to 7 mph after 6 PM, then
                    becoming light after 8 PM then becoming
                    northeast 5 to 7 mph overnight.
Ridgetop wind.......West winds around 6 mph shifting to the
                    northwest 6 to 8 mph after 6 PM, then
                    becoming light after 8 PM then becoming
                    northeast 6 to 8 mph overnight.
Mixing height.......100 ft AGL overnight into the late morning.
Transport winds.....West around 6 mph early in the evening becoming
                    light, then becoming northeast 5 to 6 mph in
                    the late evening and overnight.
Ventilation Index...Poor (30).

.WEDNESDAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....44-47.
Min humidity........68-73 percent.
Wind (20 ft)........East winds 5 to 8 mph.
Ridgetop wind.......East winds 6 to 9 mph.
Mixing height.......2300 ft AGL in the late morning and afternoon.
Transport winds.....East 6 to 14 mph.
Ventilation Index...Poor (30-160) increasing to poor (40-160) in
                    the afternoon.

$$
Forecaster...Bennese
Requested by...Pedro Pantoja Wright
Type of request...PRESCRIBED
.TAG 2526293.0/PDT
.DELDT 11/18/25
.FormatterVersion 2.0.0
.EMAIL pedro.wright@dnr.wa.gov