146
FNUS76 KPDT 030621
FWSPDT

Spot Forecast for two lakes big...yakama agency fire management
National Weather Service Pendleton OR
1121 PM PDT Sat Aug 2 2025

Forecast is based on forecast start time of 0600 PDT on August 03.
***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...Mostly quiet weather expected over the next several
days, with scattered cloud cover and slightly below-average
temperatures expected with the passage of a weather system to the
south of the site. Winds will pick up slightly along exposed
ridgetops as this system passes through late Sunday into Monday,
but benign conditions are expected otherwise.

.SUNDAY...

Sky/weather.........Mostly cloudy (65-75 percent) then becoming
                    mostly sunny (35-45 percent). Haze.
Max temperature.....64-67.
Min humidity........39-44 percent.
Wind (20 ft)........Northwest around 5 mph early, becoming
                    West at 5 to 10 mph by the late morning.
Mixing height.......2500 ft AGL.
Transport winds.....West 7 to 14 mph.
Ventilation Index...Poor (40) increasing to poor (180) in the
                    afternoon.

TIME (PDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Temp............43  44  50  55  58  62  62  63  64  64  62  61
RH..............86  82  68  58  50  45  45  44  44  45  48  53
20 FT wind dir..NW  NW  NW  W   W   W   W   W   W   W   W   W
20 FT wind spd..7   7   7   7   7   8   8   8   8   8   8   10
20 FT wind gust.10  10  10  10  10  11  11  11  14  14  14  14

.SUNDAY NIGHT...

Sky/weather.........Partly cloudy (45-55 percent). Haze in the
                    evening.
Min temperature.....40-43.
Max humidity........90-95 percent.
Wind (20 ft)........Northwest winds 5 to 10 mph.
Mixing height.......Near-surface.
Transport winds.....West 12 to 20 mph.
Ventilation Index...Poor (110) decreasing to poor (50) overnight.

.MONDAY...

Sky/weather.........Mostly sunny (30-40 percent).
Max temperature.....Around 60.
Min humidity........58-63 percent.
Wind (20 ft)........Northwest around 5 mph early, becoming
                    West at 5 to 10 mph by the late morning.
Mixing height.......2200 ft AGL.
Transport winds.....West 10 to 18 mph.
Ventilation Index...Poor (60) increasing to poor (190) in the
                    afternoon.

$$
Forecaster...Evans
Requested by...gary peters
Type of request...WILDFIRE
.TAG 2519132.0/PDT
.DELDT 08/03/25
.FormatterVersion 2.0.0
.EMAIL gary_peters@yakama.com