294
FNUS76 KPDT 270755
FWSPDT

Spot Forecast for White Swan...Yakima County EM
National Weather Service Pendleton OR
1255 AM PDT Mon Jul 27 2026

Forecast is based on forecast start time of 0100 PDT on July 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...Dry weather is expected through Monday night.

MIN RH values will be 20 to 25 percent, with good recoveries
overnight.

Winds will generally be out of the west and southwest and will
increase during the day today and tonight.

.REST OF TONIGHT...

Sky/weather.........Mostly clear (5-15 percent). Patchy smoke.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....60-63.
Max humidity........60-65 percent.
Wind (20 ft)........West winds 5 to 8 mph.
Ridgetop wind.......West winds 5 to 10 mph.
Mixing height.......500 ft AGL.
Transport winds.....West 6 to 9 mph.
Ventilation Index...Low (30).

TIME (PDT)      1AM 2AM 3AM 4AM 5AM 6AM 7AM 8AM 9AM 10A 11A 12P
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............67  66  63  62  61  60  64  67  71  77  80  82
RH..............50  54  58  61  64  65  58  51  45  39  34  30
20 FT wind dir..W   SW  W   W   W   W   W   N   NE  E   SE  S
20 FT wind spd..8   7   7   7   7   7   6   5   5   5   5   7
20 FT wind gust.                                    6   7   10

.TODAY...

Sky/weather.........Sunny (0-10 percent). Patchy smoke early in the
                    morning. Patchy smoke late in the morning, then
                    areas of smoke late in the afternoon.
CWR.................0 percent.
Chance of lightning.1 percent.
Max temperature.....90-93.
Min humidity........20-25 percent.
Wind (20 ft)........West winds 5 to 8 mph shifting to the north
                    around 5 mph early in the morning, then
                    shifting to the northeast 5 to 7 mph late in
                    the morning shifting to the south 5 to 8 mph
                    late in the morning shifting to the southwest 10
                    to 17 mph.
Ridgetop wind.......West winds 5 to 10 mph, shifting to the southwest in
                    the afternoon and increasing to 10 to 15 mph.
Mixing height.......7800 ft AGL early in the morning.
Transport winds.....Southwest 5 to 10 mph increasing to around 16
                    mph late in the afternoon.
Ventilation Index...Low (60) increasing to very high (780) in the
                    afternoon.

.TONIGHT...

Sky/weather.........Mostly clear (0-10 percent). Areas of smoke
                    early in the evening, then patchy smoke early
                    in the evening.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....Around 60.
Max humidity........63-68 percent.
Wind (20 ft)........Southwest winds 10 to 15 mph.
Ridgetop wind.......West wind around 10 to 15 mph.
Mixing height.......500 ft AGL in the evening and overnight then
                    500 ft AGL early in the morning.
Transport winds.....West 8 to 16 mph.
Ventilation Index...Moderate (420) decreasing to low (30)
                    overnight.

$$
Forecaster...Nierenberg
Requested by...Tony Miller
Type of request...WILDFIRE
.TAG 2618364.0/PDT
.DELDT 07/27/26
.FormatterVersion 2.0.0
.EMAIL Antone.miller@co.yakima.wa.us