307
FNUS76 KPDT 110031
FWSPDT

Spot Forecast for Johnson Road...WA DNR
National Weather Service Pendleton OR
531 PM PDT Sat Oct 10 2026

Forecast is based on ignition time of 0700 PDT on October 11.
***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 air with min RH`s dropping down to the mid-30`s
percent range, with excellent overnight recoveries expected. Winds
will be light in general, but could infrequent 15 to 20 mph gusts
through the day on Sunday. Otherwise, winds will decrease heading
into the overnight hours and into Monday.

.SUNDAY...

Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....59-64.
Min humidity........35-40 percent.
Wind (20 ft)........Northeast winds 7 to 12 mph.
Ridgetop wind.......Northeast winds 10 to 20 mph.
Mixing height.......6500 ft AGL.
Transport winds.....Northeast 10 to 20 mph.
Ventilation Index...Low (130) increasing to very high (790) in the
                    afternoon.

TIME (PDT)      7 AM   9 AM   11 AM  1 PM   3 PM   5 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............43     47     49     56     58     56
RH..............73     65     63     47     40     41
20 ft wind......N 8    NE 8   NE 8   NE 10  NE 10  NE 8
20 ft wind gust.13     11     13     13     14     13

.SUNDAY NIGHT...

Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....35-40.
Max humidity........65-70 percent.
Wind (20 ft)........Northeast winds 5 to 10 mph shifting to the
                    north by 2 am.
Ridgetop wind.......Northeast winds 7 to 12 mph shifting to the
                    north by 2 am.
Mixing height.......3000 ft AGL early in the evening.
Transport winds.....Northeast 7 to 12 mph shifting to the north 5
                    to 10 mph overnight.
Ventilation Index...Low (140) decreasing to low (30) overnight.

.COLUMBUS DAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....61-64.
Min humidity........34-39 percent.
Wind (20 ft)........North winds 5 to 10 mph shifting to the south 3
                    to 8 mph by 11 am.
Ridgetop wind.......North winds 7 to 12 mph shifting to the south 5
                    to 10 mph by 11 am.
Mixing height.......4500 ft AGL late in the morning.
Transport winds.....North 5 to 10 mph shifting to the southeast 5 to
                    10 mph late in the morning.
Ventilation Index...Low (30) increasing to low (160) in the
                    afternoon.

$$
Forecaster...Day
Requested by...Carolyn Kelly
Type of request...PRESCRIBED
.TAG 2623279.0/PDT
.DELDT 10/10/26
.FormatterVersion 2.0.0
.EMAIL carolyn.kelly@dnr.wa.gov