288
FNUS76 KPDT 101540
FWSPDT

Spot Forecast for Minus 5 Rx Piles...Washington Department of Natural Resources
National Weather Service Pendleton OR
740 AM PST Wed Dec 10 2025

Forecast is based on forecast start time of 0804 PST on December 10.
***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...A prolonged rain event will continue today with rain
showers expected to impact the burn area this morning and afternoon.
Meanwhile, strong winds from a low level jet will impact the burn
area through tomorrow morning, with gusts around or just above 35 mph.
Rain will become light with more infrequent showers Thursday as the
bulk of the rain lifts north of the area. Winds will decrease,
but will remain between 10-15mph Thursday afternoon. Winds will become
less than 10mph overnight Thursday, with lighter winds and dry conditions
persisting into Saturday. Ventilation will remain poor due to near
surface mixing heights around the burn area through Thursday.


.REST OF TODAY...

Sky/weather.........Mostly cloudy (80-90 percent). Chance of rain.
CWR.................54 percent decreasing to 18 percent in the late
                    morning and afternoon.
Chance of lightning.0 percent.
Max temperature.....50-53.
Min humidity........89-94 percent.
Wind (20 ft)........Breezy. West winds 17 to 23 mph with gusts to
                    around 36 mph.
Mixing height.......500 ft AGL in the late morning and early
                    afternoon.
Transport winds.....West 21 to 27 mph.
Ventilation Index...Poor (30-110).

TIME (PST)      8 AM   10 AM  NOON   2 PM   4 PM   6 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............48     48     49     50     49     49
RH..............97     99     100    98     98     94
20 ft wind......W 23   W 22   W 22   W 22   W 21   W 19
20 ft wind gust.36     31     31     30     30     30

.TONIGHT...

Sky/weather.........Cloudy (85-95 percent). Chance of rain early in
                    the evening, then rain likely in the evening
                    and overnight. Chance of rain after 3 am.
CWR.................16 percent increasing to 40 percent in the late
                    evening and overnight.
Chance of lightning.0 percent.
Min temperature.....46-49.
Max humidity........95-100 percent.
Wind (20 ft)........Breezy. West winds 17 to 25 mph with gusts to
                    around 35 mph.
Mixing height.......Near Surface.
Transport winds.....West 20 to 27 mph.
Ventilation Index...Poor (30).

.THURSDAY...

Sky/weather.........Mostly cloudy (75-85 percent). Chance of rain.
CWR.................32 percent decreasing to 10 percent in the late
                    morning and afternoon.
Chance of lightning.0 percent.
Max temperature.....Around 50.
Min humidity........94-99 percent.
Wind (20 ft)........Breezy. West winds 17 to 22 mph with gusts to
                    around 32 mph decreasing to 8 to 14 mph after
11AM.
Mixing height.......Near Surface increasing to 300 ft AGL in the
afternoon.
Transport winds.....West 16 to 25 mph decreasing to around 13 mph
                    late in the afternoon.
Ventilation Index...Poor (30-50).

$$
Forecaster...Lawhorn
Requested by...Adam Chatman
Type of request...WILDFIRE
.TAG 2527033.2/PDT
.DELDT 12/10/25
.FormatterVersion 2.0.0
.EMAIL adam.chatman@dnr.wa.gov