824
FNUS76 KPDT 150126
FWSPDT

Spot Forecast for Chaparral Fire...USFS
National Weather Service Pendleton OR
626 PM PDT Tue Jul 14 2026

Forecast is based on forecast start time of 1800 PDT on July 14.
***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...An inversion will set up overnight around 5000` and
break around 0700. A warmer (+5) and drier (-14%) day Wednesday
with a slight potential for showers late. Inversion builds between
2100-2200 at around 6000`. A slight chance of showers and
thunderstorms, peaking between 1600-1900. Light northeast winds
Wednesday, becoming more from the south on Thursday.

.WEDNESDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Chance of lightning.2 percent.
Max temperature.....80-84.
Min humidity........18-23 percent.
Wind (20 ft)........Light north winds becoming northeast 3 to 7
                    mph after noon.
Ridgetop wind.......Light north winds becoming east 4 to 8 mph
                    after noon.
Mixing height.......8500 ft AGL.
Transport winds.....Northeast around 7 mph.
Ventilation Index...Low (70) increasing to moderate (490) in the
                    afternoon.

.WEDNESDAY NIGHT...

Sky/weather.........Mostly clear (20-30 percent). 15-20 percent
                    chance of showers after 2300.
CWR.................2 percent.
Chance of lightning.2 percent.
Min temperature.....64-67.
Max humidity........50-54 percent.
Wind (20 ft)........Northeast winds around 5 mph becoming light
                    after 1900.
Ridgetop wind.......East winds 4 to 8 becoming light after 1900.
Mixing height.......500 ft AGL in the evening and overnight then
                    500 ft AGL early in the morning.
Transport winds.....Northeast around 10 mph.
Ventilation Index...Moderate (280) decreasing to low (40)
                    overnight.

.THURSDAY...

Sky/weather.........Sunny (15-25 percent). 15-20 percent chance
                    of showers in the afternoon.
CWR.................0 percent.
Chance of lightning.14 percent.
Max temperature.....81-85.
Min humidity........22-27 percent.
Wind (20 ft)........Light winds becoming south 3 to 7 mph in
                    the afternoon.
Ridgetop wind.......Light winds becoming south 4 to 8 mph in the
                    afternoon.
Mixing height.......4200 ft AGL increasing to 10700 ft AGL late in
                    the afternoon.
Transport winds.....Southeast around 11 mph.
Ventilation Index...Low (40) increasing to very high (740) in the
                    afternoon.

$$
Forecaster...Callihan
Requested by...IC Evridge
Type of request...WILDFIRE
.TAG 2617385.0/PDT
.DELDT 07/14/26
.FormatterVersion 2.0.0
.EMAIL orbmc@firenet.gov