125
FNUS76 KPDT 252115
FWSPDT

Spot Forecast for Colwash...SE Washington Type 3 Team
National Weather Service Pendleton OR
215 PM PDT Tue Aug 25 2026

Forecast is based on forecast start time of 0700 PDT on August 26.
***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...Light winds will persist into the late morning,
then increase briefly from the east before a shift to the west
with breezy conditions developing in the afternoon. Winds will
gradually decrease through the late evening tomorrow, then increase
again from the west Thursday afternoon. Afternoon RHs will be in
the low 20s tomorrow and Thursday, with good overnight recovery.


.WEDNESDAY...

Sky/weather.........Mostly sunny (25-35 percent). Patchy smoke.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....95-98.
Min humidity........21-26 percent.
Wind (20 ft)........Light variable winds becoming east 4 to 7 mph
around 11AM, then shifting to the west
8 to 15 mph with gusts up to 23 mph after
2PM.
Mixing height.......8500 ft AGL early in the morning.
Transport winds.....West 5 to 6 mph increasing to around 16 mph.
Ventilation Index...Low (30-40) increasing to moderate to high
                    (440-540) in the afternoon.

TIME (PDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............62  66  71  77  81  84  88  92  93  94  94  91
RH..............68  59  49  44  39  35  31  27  24  24  25  26
20 FT wind dir..NW  NW  N   N   E   E   E   NW  W   W   W   W
20 FT wind spd..4   3   2   3   4   5   7   6   8   10  12  13
20 FT wind gust.                                    15  21  21

.WEDNESDAY NIGHT...

Sky/weather.........Partly cloudy (35-45 percent) then becoming
                    mostly cloudy (55-65 percent) then becoming
                    partly cloudy (30-40 percent). Patchy smoke in
                    the evening and overnight.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....56-62.
Max humidity........59-77 percent.
Wind (20 ft)........West winds 10 to 15 mph with gusts to around
26 mph decreasing to 5 to 10 mph around 10PM,
then becoming light variable winds after 12AM.
Mixing height.......500 ft AGL.
Transport winds.....West 7 to 16 mph.
Ventilation Index...Moderate (390-410) decreasing to low (30-40)
                    overnight.

.THURSDAY...

Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 90.
Min humidity........22-27 percent.
Wind (20 ft)........Light variable winds becoming west 5 to 10 mph
after 10AM, then increasing to 8 to 14 mph with
gusts to around 22 mph around 1PM.
Mixing height.......7200 ft AGL early in the morning.
Transport winds.....West 6 to 15 mph increasing to around 17 mph
                    late in the afternoon.
Ventilation Index...Low (40-50) increasing to high (530-580) in the
                    afternoon.

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...
Mostly clear. Lows in the lower 50s. Highs in the mid 80s. Light
winds.
.SATURDAY...
Mostly clear. Lows around 50. Highs in the lower 80s. Light
winds.
.SUNDAY...
Mostly clear. Lows in the upper 40s. Highs in the lower 80s.
Light winds.

$$
Forecaster...Lawhorn
Requested by...David Winter
Type of request...WILDFIRE
.TAG 2620521.0/PDT
.DELDT 08/25/26
.FormatterVersion 2.0.0
.EMAIL david_winter@firenet.gov