181
FNUS76 KPDT 150411
FWSPDT

Spot Forecast for Bench Fire...OR-WSA
National Weather Service Pendleton OR
911 PM PDT Fri Aug 14 2026

Forecast is based on forecast start time of 0700 PDT on August 15.
***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 weather pattern that supports showers and thunderstorms
is ongoing across the Pacific Northwest. Following a very low (10
percent) chance of nocturnal and early morning showers and thunderstorms,
there is a slight chance (20 percent) of showers and thunderstorms
Saturday afternoon for the burn site. Winds are expected to be diurnally
driven, strongest in the late afternoon and early evening. Any showers
and thunderstorms that develop will be capable of producing gusty,
erratic outflow winds.

.SATURDAY...

Sky/weather.........Mostly cloudy (65-75 percent) early morning,
                    becoming mostly sunny (5-25 percent) late
                    morning, then becoming partly cloudy
                    (30-50 percent) in the afternoon. Patchy smoke.
                    Very low (10 percent) chance of showers and
                    thunderstorms early morning, then slight chance
                    (20 percent) of showers and thunderstorms in
                    the afternoon.
CWR.................10 percent.
Chance of lightning.20 percent.
Max temperature.....83-86.
Min humidity........33-38 percent.
Wind (20 ft)........Light winds early morning, becoming northeast
                    5-9 mph late morning and early afternoon, then
                    shifting to the northwest 8-12 mph with gusts
                    of 15-20 mph late afternoon. Gusty and erratic
                    winds expected near thunderstorms.
Ridgetop wind.......Light winds early morning, becoming northeast
                    6-10 mph late morning and early afternoon, then
                    shifting to the northwest 8-12 mph with gusts
                    of 15-25 mph late afternoon. Gusty and erratic
                    winds expected near thunderstorms.
Mixing height.......Increasing to 6000-6500 ft AGL by afternoon.
Transport winds.....Light winds becoming west 9 to 12 mph.
Ventilation Index...Low (40-50) increasing to moderate (270-340) in
                    the afternoon.

TIME (PDT)      7 AM   9 AM   11 AM  1 PM   3 PM   5 PM
Chc of ltng (%).0      0      10     10     20     10
Temp............59     64     73     80     83     81
RH..............71     63     49     39     36     42
20 ft wind......VRB 4  NNE 7  NE 7   NE 8   NNW 8  NW 10
20 ft wind gust.              12     12     15     18

.SATURDAY NIGHT...

Sky/weather.........Partly cloudy (30-40 percent) then becoming
                    mostly cloudy (70-90 percent).
CWR.................0 percent.
Chance of lightning.5 percent.
Min temperature.....56-59.
Max humidity........69-75 percent.
Wind (20 ft)........Northwest winds 8-12 mph with gusts of 15-20 mph
                    early evening, becoming northeast 4-8 mph late
                    evening, then becoming variable 1-3 mph overnight.
Ridgetop wind.......Northwest winds 8-12 mph with gusts of 15-25 mph
                    early evening, becoming northeast 4-8 mph late
                    evening, then becoming variable 1-3 mph overnight.
Mixing height.......Decreasing to 300-700 ft AGL overnight.
Transport winds.....Northwest 10 to 12 mph in the evening becoming
                    light.
Ventilation Index...Moderate (240-260) decreasing to low (30)
                    overnight.

$$
Forecaster...Plunkett
Requested by...Gary Sampson
Type of request...WILDFIRE
.TAG 2619733.0/PDT
.DELDT 08/14/26
.FormatterVersion 2.0.0
.EMAIL micah.david@ctwsbnr.org,gary.sampson@ctwsbnr.org