320
FNUS76 KPDT 161902
FWSPDT

Spot Forecast for Chaparral...USFS
National Weather Service Pendleton OR
1202 PM PDT Thu Jul 16 2026

Forecast is based on forecast start time of 1200 PDT on July 16.
***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...Isolated to scattered showers and thunderstorms are ongoing
across the Blue Mountains. Through afternoon, there is a chance (50 percent)
of showers and chance (25 percent) of thunderstorms. Any showers and
thunderstorms that develop will be capable of producing strong, erratic, and
gusty outflow winds up to 50 mph. There is a very low chance (10 percent) of
additional high-based showers overnight into Friday morning.

.REST OF TODAY...

Sky/weather.........Partly to mostly cloudy (35-75 percent). Chance
                    (50 percent) of showers and thunderstorms.
CWR.................20 percent.
Chance of lightning.25 percent.
Max temperature.....87-90.
Min humidity........27-32 percent.
Wind (20 ft)........Southeast winds 2-5 mph. Gusty and erratic
                    winds expected near thunderstorms.
Ridgetop wind.......Southeast winds 4-8 mph. Gusty and erratic
                    winds expected near thunderstorms.
Mixing height.......Increasing to 9000-9500 ft AGL by mid-afternoon.
Transport winds.....South 8-12 mph.
Ventilation Index...Increasing to very high (900).

.TONIGHT...

Sky/weather.........Mostly clear to partly cloudy (10-35 percent). Slight
                    chance (15 percent) of showers and thunderstorms
                    in the evening.
CWR.................5 percent in the evening.
Chance of lightning.15 percent.
Min temperature.....61-64.
Max humidity........60-65 percent.
Wind (20 ft)........North winds 2-5 mph in the evening becoming
                    variable 1-4 mph overnight. Gusty and erratic
                    winds expected near thunderstorms in the evening.
Ridgetop wind.......North winds 3-7 mph in the evening becoming
                    variable 2-5 mph overnight. Gusty and erratic
                    winds expected near thunderstorms in the evening.
Mixing height.......Decreasing to 300-600 ft AGL overnight.
Transport winds.....Northwest 6-8 mph in the evening, becoming variable
                    2-5 mph overnight.
Ventilation Index...Decreasing to low (30) overnight.

.FRIDAY...

Sky/weather.........Mostly sunny (0-15 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Max temperature.....81-84.
Min humidity........30-35 percent.
Wind (20 ft)........Variable winds 1-5 mph. Gusts up to 12 mph.
Ridgetop wind.......Variable winds 2-5 mph. Gusts up to 15 mph.
Mixing height.......Increasing to 5000-5500 ft AGL by mid-afternoon.
Transport winds.....Southeast to south 5-7 mph.
Ventilation Index...Increasing to moderate (300) in the afternoon.

$$
Forecaster...Plunkett
Requested by...IC Evridge
Type of request...WILDFIRE
.TAG 2617489.0/PDT
.DELDT 07/16/26
.FormatterVersion 2.0.0
.EMAIL orbmc@firenet.gov