181
FNUS76 KPDT 110956
FWSPDT

Spot Forecast for Galena 40c/41...USDA Forest Service
National Weather Service Pendleton OR
256 AM PDT Mon May 11 2026

Forecast is based on ignition time of 0800 PDT on May 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 transport wind
   multiplied by the mixing height in 100`s of ft.
   Categories are a generalized indicator only:
   low (< 200), moderate (200-500), high (500-700),
   and very high (> 700).                           ***

If you have questions or concerns with this forecast, please
contact our office at (541) 276-8134.

.DISCUSSION...

A light, under 5 mph westerly surface wind will pickup by 1300
to 6 to 10 mph with ridgetop winds up in the 11 to 15 mph range.
Winds will go light again (under 5 mph) by 2000 as afternoon
relative humidity around 15 percent recovers to 50 to 55
percent overnight.

.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....80-83.
Min humidity........13-18 percent.
Wind (20 ft)........Light winds becoming northwest 5 to 8 mph late
                    in the morning.
Ridgetop wind.......
Mixing height.......5700 ft AGL.
Transport winds.....West 6 to 9 mph.
Ventilation Index...Low (70) increasing to moderate (370) in the
                    afternoon.

TIME (PDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............48  56  64  69  73  77  78  80  80  79  77  74
RH..............55  39  31  25  23  20  18  17  18  19  22  30
20 FT wind dir..W   W   W   W   W   NW  NW  NW  NW  NW  NW  W
20 FT wind spd..3   4   4   5   5   6   7   7   7   7   6   5
20 FT wind gust.4   5   5   6   7   10  10  10  10  11  10  7

.TONIGHT...

Sky/weather.........Mostly clear (20-30 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....Around 50.
Max humidity........51-56 percent.
Wind (20 ft)........Northwest winds 5 to 7 mph early in the evening
                    becoming light, then becoming east around 5
                    overnight.
Ridgetop wind.......Northwest 10 to 15 mph in the evening becoming
                    around 5 mph out of the east overnight.
Mixing height.......3600 ft AGL early in the evening.
Transport winds.....West around 7 mph shifting to the northeast 5
                    to 8 mph early in the evening, then shifting to
                    the east 8 to 9 mph overnight.
Ventilation Index...Low (50) and decreasing overnight.

.TUESDAY...

Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Max temperature.....90-93.
Min humidity........9-14 percent.
Wind (20 ft)........Southeast winds 5 to 10 mph with gusts to
                    around 17 mph shifting to the south with gusts
                    to around 18 mph late in the afternoon.
Ridgetop wind.......Southeast winds 9 to 15 mph with gusts to
                    around 24 mph shifting to the south with gusts
                    to around 30 mph late in the afternoon.
Mixing height.......11900 ft AGL.
Transport winds.....East 9 to 10 mph shifting to the south 16 to 18
                    mph late in the morning.
Ventilation Index...Low (90) increasing to very high (1050) in the
                    afternoon.

$$
Forecaster...Russell
Requested by...Brandon Borden
Type of request...PRESCRIBED
.TAG 2613180.2/PDT
.DELDT 05/11/26
.FormatterVersion 2.0.0
.EMAIL Brandon.Borden@usda.gov