290
FNUS76 KPDT 161356
FWSPDT

Spot Forecast for Bear Creek Unit 2 Rx Burn...Washington DNR
National Weather Service Pendleton OR
656 AM PDT Thu Oct 16 2025

Forecast is based on ignition time of 0700 PDT on October 16.
***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 cold front and upper weather system will bring
increasing southwest to west winds tomorrow, with mainly south
winds today and variable overnight. Light rain will be possible
over the burn area, though any rain amounts will be up to 0.03
inches at best. RHs this afternoon will be in the mid to upper 30s
both afternoons with excellent overnight recovery. Ventilation
across the burn area will be poor through tomorrow morning.

.REST OF TODAY...

Sky/weather.........Mostly sunny (25-35 percent). Widespread frost
                    early in the morning, then areas of frost early
                    in the morning.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....64-67.
Min humidity........32-37 percent.
Wind (20 ft)........Light drainage winds becoming south 5 to 7 mph
after 11AM.
Ridgetop wind.......West winds 4 to 8 mph.
Mixing height.......3200 ft AGL.
Transport winds.....North around 5 mph early in the morning
                    becoming light, then becoming west 5 to 9 mph
                    late in the morning.
Ventilation Index...Poor (30) increasing to poor (150) in the
                    afternoon.

TIME (PDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............31  30  36  45  50  56  60  61  64  62  61  57
RH..............80  80  73  60  50  45  38  37  37  38  41  48
20 FT wind dir..S   S   S   S   S   S   S   S   S   S   S   S
20 FT wind spd..4   4   4   4   5   5   5   5   5   5   6   6
20 FT wind gust.5   5   5   5   7   7   7   10  10  10  11  11

.TONIGHT...

Sky/weather.........Mostly cloudy (55-65 percent). Patchy frost
                    overnight. Slight chance of rain early in the
                    morning.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....34-37.
Max humidity........95-100 percent.
Wind (20 ft)........South winds 4 to 7 mph becoming variable winds
2 to 4 mph after 9PM.
Ridgetop wind.......West winds 4 to 7 mph.
Mixing height.......900 ft AGL.
Transport winds.....West 6 to 7 mph.
Ventilation Index...Poor (60).

.FRIDAY...

Sky/weather.........Partly sunny (50-60 percent) then becoming
                    sunny (5-15 percent). Slight chance of rain
                    early in the morning.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....61-64.
Min humidity........35-40 percent.
Wind (20 ft)........Variable winds 2 to 4 mph becoming southwest
winds 5 to 10 mph around 10AM, then shifting to
the west with gusts to around 21 mph after 4PM.
Ridgetop wind.......West winds 4 to 7 mph increasing to 9 to 15 mph
with gusts to around 24 mph after 3PM.
Mixing height.......3700 ft AGL.
Transport winds.....West 7 to 13 mph.
Ventilation Index...Poor (60) increasing to fair (340) in the
                    afternoon.

$$
Forecaster...Lawhorn
Requested by...Adam Lieberg
Type of request...PRESCRIBED
.TAG 2523630.0/PDT
.DELDT 10/15/25
.FormatterVersion 2.0.0
.EMAIL alieberg@columbialandtrust.org