956
FNUS76 KPDT 111454
FWSPDT

Spot Forecast for Minus 5 Rx Piles...Washington Department of Natural Resources
National Weather Service Pendleton OR
654 AM PST Thu Dec 11 2025

Forecast is based on forecast start time of 0804 PST on December 11.
***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... Excellent (95-100%) humidity recoveries this
morning due to an approaching cold front and persistent light rain
associated with a dissipating atmospheric river event. As a
result, rain chances will decrease through the day. The cold front
will bring breezy conditions this morning, slowly tapering off
through the evening hours as it retreats north. Rain amounts
today are expected to reach around a wetting rain (0.10").

.REST OF TODAY...

Sky/weather.........Mostly cloudy (75-85 percent). Rain likely
                    (55-70 percent) before 4 PM, then chance
                    (25-40 percent) after 4 PM.
CWR.................41 percent decreasing to 12 percent in the late
                    morning and afternoon.
Chance of lightning.0 percent.
Max temperature.....49-52.
Min humidity........93-98 percent.
Wind (20 ft)........West winds 15 to 20 mph with gusts to around 30
                    mph before 1400, decreasing to 6 to 12 mph with
                    gusts up to 20 mph after 1400.
Ridgetop wind.......West winds 17 to 22 mph with gusts to around 32
                    mph before 1400, decreasing to 7 to 13 mph with
                    with gusts up to 22 after 1400.
Mixing height.......300 ft AGL early in the afternoon.
Transport winds.....West 17 to 23 mph decreasing to around 13 mph
                    late in the afternoon.
Ventilation Index...Poor (30).

TIME (PST)      8 AM   10 AM  NOON   2 PM   4 PM   6 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............47     47     48     48     48     49
RH..............100    100    100    100    100    100
20 ft wind......W 19   W 19   W 17   W 15   W 11   W 11
20 ft wind gust.32     27     23     19     15     13

.TONIGHT...

Sky/weather.........Mostly cloudy (70-80 percent). Chance
                    (25-40 percent) of rain before 2200.
CWR.................3 percent.
Chance of lightning.0 percent.
Min temperature.....44-47.
Max humidity........95-100 percent.
Wind (20 ft)........West winds 6 to 12 mph.
Ridgetop wind.......West winds 7 to 13 mph.
Mixing height.......Near Surface.
Transport winds.....West 8 to 13 mph.
Ventilation Index...Poor (30).

.FRIDAY...

Sky/weather.........Mostly cloudy (70-80 percent) then becoming
                    mostly sunny (40-50 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....50-53.
Min humidity........87-92 percent.
Wind (20 ft)........West winds 4 to 8 mph with gusts up to 15
                    mph.
Ridgetop wind.......West winds 5 to 10 mph with gusts up to
                    17 mph.
Mixing height.......600 ft AGL early in the afternoon.
Transport winds.....West 8 to 12 mph.
Ventilation Index...Poor (30).

$$
Forecaster...Callihan
Requested by...Adam Chatman
Type of request...WILDFIRE
.TAG 2527033.3/PDT
.DELDT 12/11/25
.FormatterVersion 2.0.0
.EMAIL adam.chatman@dnr.wa.gov