027
FNUS76 KPDT 011804
FWSPDT

Spot Forecast for Potato Hill 8/1...Yakama
National Weather Service Pendleton OR
1104 AM PDT Fri Aug 1 2025

Forecast is based on forecast start time of 0900 PDT on August 01.
***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...Aside from a low (10%) chance of showers and
thunderstorms today, mostly quiet conditions are forecast through
Saturday with higher relative humidity.

.REST OF TODAY...

Sky/weather.........Mostly cloudy (65-75 percent) then becoming
                    mostly sunny (25-35 percent).
CWR.................1 percent.
Chance of lightning.10 percent.
Max temperature.....71-74.
Min humidity........45-50 percent.
Wind (20 ft)........West-northwest winds 5-9 mph with gusts up to
                    15 mph.
Ridgetop wind.......West-northwest winds 7-10 mph with gusts up to
                    15 mph.
Mixing height.......3400-3700 ft AGL.
Transport winds.....West 8-12 mph.
Ventilation Index...Poor (70) increasing to fair (240) in the
                    afternoon.

TIME (PDT)      9 AM   11 AM  1 PM   3 PM   5 PM   7 PM
Chc of ltng (%).10     10     10     10     10     10
Temp............58     65     69     71     70     66
RH..............66     58     51     49     50     60
20 ft wind......W 8    W 8    W 8    W 10   W 10   W 10
20 ft wind gust.12     15     15     15     15     15

.TONIGHT...

Sky/weather.........Mostly clear (15-25 percent).
CWR.................0 percent.
Chance of lightning.5 percent.
Min temperature.....47-50.
Max humidity........90-95 percent.
Wind (20 ft)........West winds 5-9 mph.
Ridgetop wind.......West winds 5-9 mph.
Mixing height.......Decreasing to 400-600 ft AGL.
Transport winds.....West 8-12 mph.
Ventilation Index...Poor (180) decreasing to poor (50) overnight.

.SATURDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................1 percent.
Chance of lightning.2 percent.
Max temperature.....69-72.
Min humidity........40-45 percent.
Wind (20 ft)........West winds 6-9 mph with gusts up to 15 mph,
                    strongest in the late afternoon.
Ridgetop wind.......West winds 7-10 mph with gusts up to 20 mph,
                    strongest in the late afternoon.
Mixing height.......Increasing to 4300-4700 ft AGL by afternoon.
Transport winds.....West 8-12 mph.
Ventilation Index...Poor (60) increasing to fair (280) in the
                    afternoon.

$$
Forecaster...Plunkett
Requested by...Dolores Moore
Type of request...WILDFIRE
.TAG 2519002.0/PDT
.DELDT 08/01/25
.FormatterVersion 2.0.0
.EMAIL dolores_moore@yakama.com