721
FNUS76 KPDT 010033
FWSPDT

Spot Forecast for Walter Springs RX...USFS
National Weather Service Pendleton OR
533 PM PDT Thu Apr 30 2026

Forecast is based on ignition time of 1800 PDT on April 30.
***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...

South winds under 10 mph will turn to out of the easterly direction in
the mid to late morning. Afternoon relative humidity is anticipated to
fall as low as 30%. A slight chance for showers on Friday will also bring
a very low chance (about 5%) for a thunderstorm. Friday Night`s recovery
into Saturday morning should bring RH`s back to around 65%.

.FRIDAY...

Sky/weather.........Partly sunny (55-65 percent).
CWR.................0 percent.
Chance of lightning.9 percent.
Max temperature.....62-65.
Min humidity........31-36 percent.
Wind (20 ft)........South winds 5 to 7 mph shifting to the
                    southeast 5 to 8 mph late in the morning.
Ridgetop wind.......South winds 6 to 9 mph shifting to the
east 5 to 10 mph around 10AM.
Mixing height.......5400 ft AGL early in the morning.
Transport winds.....South 6 to 13 mph.
Ventilation Index...Low (30) increasing to moderate (470) in the
                    afternoon.

.FRIDAY NIGHT...

Sky/weather.........Mostly cloudy (65-75 percent).
CWR.................0 percent.
Chance of lightning.9 percent.
Min temperature.....Around 50.
Max humidity........61-66 percent.
Wind (20 ft)........South winds 5 to 7 mph shifting to the
                    northwest 5 to 8 mph early in the evening.
Ridgetop wind.......south winds 6 to 8 mph shifting to the
                    northwest 5 to 8 mph early in the evening.
Mixing height.......4500 ft AGL early in the evening.
Transport winds.....South around 8 mph shifting to the northwest 5
                    to 6 mph early in the evening, then shifting to
                    the north 6 to 7 mph overnight.
Ventilation Index...Low (60) decreasing to (30) overnight.

.SATURDAY...

Sky/weather.........Partly sunny (55-65 percent).
CWR.................0 percent.
Chance of lightning.10 percent.
Max temperature.....65-68.
Min humidity........31-36 percent.
Wind (20 ft)........Northwest winds 5 to 8 mph shifting to the east
                    late in the morning.
Ridgetop wind.......Northwest winds 5 to 10 mph shifting to the east
                    late in the morning.
Mixing height.......6700 ft AGL late in the morning.
Transport winds.....Northeast around 7 mph shifting to the east 10
                    to 13 mph late in the morning.
Ventilation Index...Low (30) increasing to high (530) in the
                    afternoon.

$$
Forecaster...Russell
Requested by...Jason Buda
Type of request...PRESCRIBED
.TAG 2612340.0/PDT
.DELDT 04/30/26
.FormatterVersion 2.0.0
.EMAIL kenton.bass@usda.gov,jason.buda@usda.gov