856
FNUS76 KPDT 101129
FWSPDT

Spot Forecast for Lewis Burn...Oregon Department of Forestry
National Weather Service Pendleton OR
429 AM PDT Fri Oct 10 2025

Forecast is based on ignition time of 0600 PDT on October 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 weather system will gradually move through the
Pacific Northwest this weekend, making for intermittent rain
chances and locally breezy winds. Ahead of this system, winds will
primarily flow from the south, before becoming more westerly over
the weekend. Rain chances will be at their highest during the day
Saturday and Sunday. Winds are expected to be at their strongest
during the day Friday.

.TODAY...

Sky/weather.........Mostly cloudy (60-70 percent) then becoming
                    sunny (15-25 percent).
CWR.................0 percent.
Chance of lightning.5 percent.
Max temperature.....66-69.
Min humidity........26-31 percent.
Wind (20 ft)........South-Southwest winds 6 to 12 mph with gusts to
                    around 18 mph.
Ridgetop wind.......South-Southwest winds 10 to 18 mph.
Mixing height.......7100 ft AGL.
Transport winds.....South around 18 mph increasing to around 30 mph
                    late in the morning, then becoming southwest
                    around 18 mph late in the afternoon.
Ventilation Index...Poor (200) increasing to excellent (1050) in
                    the afternoon.

TIME (PDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............55     53     60     64     66     64
RH..............37     43     36     34     30     31
20 ft wind......S 8    SE 8   SE 8   S 10   S 11   S 11
20 ft wind gust.10     10     10     16     18     18

.TONIGHT...

Sky/weather.........Partly cloudy (40-50 percent) then becoming
                    mostly cloudy (65-75 percent). Chance of rain
                    showers (25-35 percent).
CWR.................0 percent increasing to 10 percent early in the
                    morning.
Chance of lightning.5 percent.
Min temperature.....39-42.
Max humidity........77-82 percent.
Wind (20 ft)........West winds 5 to 10 mph decreasing to 5 to 8 mph
                    late in the evening.
Ridgetop wind.......West winds 7 to 14 mph.
Mixing height.......900 ft AGL.
Transport winds.....West 9 to 16 mph decreasing to around 6 mph late
                    in the evening.
Ventilation Index...Poor (190) decreasing to poor (40) overnight.

.SATURDAY...

Sky/weather.........Partly sunny (65-75 percent). Chance of rain
                    showers throughout the day (60-70 percent).
CWR.................10 percent increasing to 21 percent late in the
                    morning.
Chance of lightning.5 percent.
Max temperature.....44-47.
Min humidity........59-64 percent.
Wind (20 ft)........West winds 6 to 12 mph.
Ridgetop wind.......West winds 7 to 14 mph.
Mixing height.......3800 ft AGL.
Transport winds.....Northwest 7 to 15 mph.
Ventilation Index...Poor (70) increasing to fair (260) in the
                    afternoon.

$$
Forecaster...Evans
Requested by...Amanda Rau
Type of request...PRESCRIBED
.TAG 2523281.0/PDT
.DELDT 10/10/25
.FormatterVersion 2.0.0
.EMAIL micah.schmidt@oregonstate.edu