481
FNUS76 KPDT 260103
FWSPDT

Spot Forecast for Shingle Fire...ODF
National Weather Service Pendleton OR
603 PM PDT Sat Jul 25 2026

Forecast is based on forecast start time of 0600 PDT on July 26.
***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...Morning inversion breaks between 0800-0900 with the
thermal belt around 5500 feet. Slightly cooler (-2) but drier
(-1%) day today. Winds increase through the afternoon due to a
gradient developing along the Cascades, peaking between 1600-2100
each day.

.SUNDAY...

Sky/weather.........Sunny (0-10 percent). Smoke.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....77-85.
Min humidity........14-19 percent.
Wind (20 ft)........Light winds becoming south 2 to 6 mph after
                    0800, then shifting to the southwest 5
                    to 10 mph with gusts up to 20 mph after noon.
                    Winds peak between 1600-2000.
Ridgetop wind.......Light winds becoming south 3 to 7 mph after
                    0800, then shifting to the southwest 6 to 12
                    mph with gusts up to 23 mph after noon. Winds
                    peak between 1600-2000.
Mixing height.......8500 ft AGL early in the morning.
Transport winds.....Light winds becoming southwest 8 to 17 mph
                    early in the morning, then shifting to the
                    northwest late in the afternoon.
Ventilation Index...Low (50-100) increasing to very high (960-1050)
                    in the afternoon.

TIME (PDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............51  55  59  62  68  72  75  77  79  80  80  80
RH..............64  56  49  42  36  30  25  23  20  18  18  18
20 FT wind dir..SW  S   S   SE  S   S   SW  SW  SW  W   NW  NW
20 FT wind spd..1   1   2   2   3   3   5   6   6   7   8   10
20 FT wind gust.4   4   5   5   7   7   8   9   10  14  15  19

.SUNDAY NIGHT...

Sky/weather.........Mostly clear (5-15 percent). Smoke.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....48-53.
Max humidity........63-69 percent.
Wind (20 ft)........Northwest winds 5 to 10 mph with gusts up
                    to 20 mph in the evening becoming light
                    after midnight.
Ridgetop wind.......Northwest winds 6 to 12 mph with gusts up
                    to 23 mph in the evening becoming light
                    after midnight.
Mixing height.......1400 ft AGL in the evening.
Transport winds.....Northwest 6 to 15 mph.
Ventilation Index...Moderate (430-460) decreasing to low (30-40)
                    overnight.

.MONDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....76-84.
Min humidity........17-22 percent.
Wind (20 ft)........Light downslope/downvalley winds becoming west
                    2 to 6 mph after noon, then northwest 5 to 10
                    mph with gusts up to 18 mph after 1600. Winds
                    peak between 1800-2100.
Ridgetop wind.......Light winds becoming west 2 to 6 mph after
                    noon, then northwest 6 to 12 mph with gusts up
                    to 20 mph after 1600. Winds peak between
                    1800-2100.
Mixing height.......9000 ft AGL early in the morning.
Transport winds.....West around 6 mph early in the morning becoming
                    light, then becoming southwest 9 to 13 mph late
                    in the morning.
Ventilation Index...Low (30-40) increasing to high to very high
                    (650-750) in the afternoon.

$$
Forecaster...Callihan
Requested by...Dave Isackson
Type of request...WILDFIRE
.TAG 2618138.2/PDT
.DELDT 07/25/26
.FormatterVersion 2.0.0
.EMAIL david_isackson@firenet.gov