114
FNUS76 KPDT 290027
FWSPDT

Spot Forecast for Walter Springs RX...USFS
National Weather Service Pendleton OR
527 PM PDT Tue Apr 28 2026

Forecast is based on ignition time of 0600 PDT on April 29.
***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...

Northerly wind early in the morning will become established out
of the east in the afternoon, as relative humidity as low as 35
percent improves Wednesday Night to around 60 percent.


.WEDNESDAY...

Sky/weather.........Sunny (10-20 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....56-59.
Min humidity........36-41 percent.
Wind (20 ft)........Northwest winds 5 to 8 mph shifting to the
                    northeast early in the morning, then shifting
                    to the east late in the morning.
Ridgetop wind.......Northwest winds 8 to 11 mph shifting to the
                    northeast early in the morning, then shifting
                    to the east late in the morning.
Mixing height.......5100 ft AGL early in the morning.
Transport winds.....West around 7 mph shifting to the east 6 to 8
                    mph early in the morning.
Ventilation Index...Low (30) increasing to moderate (300) in the
                    afternoon.

TIME (PDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............35     40     48     53     55     56
RH..............84     69     54     47     43     41
20 ft wind......NW 8   NE 7   NE 7   E 7    E 7    E 7
20 ft wind gust.14     12     12     12     12     12

.WEDNESDAY NIGHT...

Sky/weather.........Mostly clear (5-15 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....41-44.
Max humidity........58-63 percent.
Wind (20 ft)........East winds 5 to 7 mph early in the evening
                    becoming light, then becoming west 5 to 7 mph
                    overnight.
Ridgetop wind.......East winds 8 to 11 mph early in the evening
                    becoming light, then becoming west 7 to 10 mph
                    overnight.
Mixing height.......4500 ft AGL early in the evening.
Transport winds.....East 7 to 8 mph shifting to the southeast
                    around 5 mph late in the evening, then becoming
                    light overnight becoming northeast around 5 mph
                    early in the morning.
Ventilation Index...Low (140) decreasing to low (30) overnight.

.THURSDAY...

Sky/weather.........Mostly sunny (30-40 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Max temperature.....60-63.
Min humidity........32-37 percent.
Wind (20 ft)........Northwest winds 5 to 7 mph shifting to the
                    southeast 5 to 8 mph late in the morning.
Ridgetop wind.......Northwest winds 7 to 9 mph shifting to the
                    southeast 6 to 9 mph late in the morning.
Mixing height.......5100 ft AGL late in the morning.
Transport winds.....Northeast around 5 mph shifting to the
                    southeast 5 to 7 mph early in the morning, then
                    shifting to the northeast around 7 mph late in
                    the afternoon.
Ventilation Index...Low (30) increasing to moderate (270) in the
                    afternoon.

$$
Forecaster...Russell
Requested by...Nicholas Steel
Type of request...PRESCRIBED
.TAG 2611886.0/PDT
.DELDT 04/28/26
.FormatterVersion 2.0.0
.EMAIL nicholas.steel@usda.gov