738
FNUS76 KPDT 272333
FWSPDT

Spot Forecast for Orchard Fire...OSFM
National Weather Service Pendleton OR
433 PM PDT Sun Sep 27 2026

Forecast is based on forecast start time of 1700 PDT on September 27.
***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...

Southeast winds turning southwest early This Evening, with wind
speeds up to around 12 mph on the ridge tops though 7 pm.
Around 30 percent relative humidity is expected to recover to around
65 percent overnight.


.REST OF TODAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....66-69.
Min humidity........29-34 percent.
Wind (20 ft)........East winds 5 to 6 mph turning southwest by 8 or 9 pm.
Ridgetop wind.......East winds 6 to 10 mph turning southwest by 8 or 9 pm.
Mixing height.......2300 ft AGL.
Transport winds.....East around 7 mph.
Ventilation Index...Low (60).

TIME (PDT)      5PM 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............65  61  57  55  51  49  48  46  45  43  42  41
RH..............35  39  42  44  44  45  48  51  53  54  56  57
20 FT wind dir..E   E   SE  S   SW  SW  SW  W   W   W   W   W
20 FT wind spd..6   5   4   3   3   3   3   3   3   3   3   4
20 FT wind gust.12  10  7   5   5   3   3   3   3   3   3   4

.TONIGHT...

Sky/weather.........Mostly clear (0-10 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....39-42.
Max humidity........61-66 percent.
Wind (20 ft)........East winds around 5-10 mph early in the evening
                    becoming light southwest.
Ridgetop wind.......East winds around 7-12 mph early in the evening
                    becoming light southwest.
Mixing height.......2300 ft AGL early in the evening.
Transport winds.....East around 7 mph shifting to the southwest 5
                    to 6 mph early in the evening, then shifting to
                    the west overnight.
Ventilation Index...Low (60) decreasing to low (30) overnight.

.MONDAY...

Sky/weather.........Sunny (15-25 percent) then becoming partly
                    sunny (50-60 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....71-74.
Min humidity........32-37 percent.
Wind (20 ft)........Light winds becoming northwest 5 to 13 mph in
                    the afternoon, then shifting to the west 6 to
                    11 mph late in the afternoon.
Ridgetop wind.......Light winds becoming northwest 7 to 15 mph in
                    the afternoon, then shifting to the west 8 to
                    12 mph late in the afternoon.
Mixing height.......3700 ft AGL early in the morning.
Transport winds.....West 5 to 8 mph increasing to 16 to 18 mph late
                    in the afternoon.
Ventilation Index...Low (30) increasing to moderate (340) in the
                    afternoon.

$$
Forecaster...Russell
Requested by...Michial Renault
Type of request...WILDFIRE
.TAG 2622630.0/PDT
.DELDT 09/27/26
.FormatterVersion 2.0.0
.EMAIL michial.renault@osfm.oregon.gov