168
FNUS76 KPDT 271207
FWSPDT

Spot Forecast for Klickitat Canyon Rx Burn...Columbia Land Trust
National Weather Service Pendleton OR
507 AM PDT Tue Oct 27 2026

Forecast is based on ignition time of 0600 PDT on October 27.
***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...A series of upper weather systems moving through the
area will continue to bring rain shower chances to the burn area
through tomorrow. Winds are expected to increase from the west later
this morning, then shift to the southwest overnight. Winds will decrease
by tomorrow morning, but are expected to increase slightly again from
the west tomorrow. Today will see the best ventilation potential, with
low level inversion expected to develop around 7PM this evening.

.TODAY...

Sky/weather.........Mostly cloudy (70-80 percent) then becoming
                    mostly sunny (30-40 percent). Patchy fog in the
                    morning. Slight chance of rain showers in the
                    morning.
CWR.................2 percent.
Chance of lightning.4 percent.
Max temperature.....49-52.
Min humidity........78-83 percent.
Wind (20 ft)........Southwest winds 3 to 6 mph shifting to the west
7 to 12 mph with gusts to around 22 mph around
 11AM.
Ridgetop wind.......Southwest winds 4 to 7 mph shifting to the
west 10 to 15 mph with gusts to around 24 mph
around 11AM.
Mixing height.......3500 ft AGL.
Transport winds.....West 5 to 6 mph increasing to 15 to 20 mph late
                    in the morning.
Ventilation Index...Low (30) increasing to moderate (490) 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............36     35     38     44     48     47
RH..............100    100    100    100    82     80
20 ft wind......SW 4   S 3    SW 5   W 8    W 11   W 12
20 ft wind gust.                     14     20     22

.TONIGHT...

Sky/weather.........Mostly cloudy (50-80 percent). Rain showers likely
through the evening and overnight.
CWR.................0 percent increasing to 76 percent late in the
                    evening.
Chance of lightning.6 percent.
Min temperature.....33-36.
Max humidity........95-100 percent.
Wind (20 ft)........West winds 7 to 12 mph with gusts to around 22 mph
shifting to the southwest around 7PM.
Ridgetop wind.......West winds 10 to 15 mph with gusts to around 25 mph
shifting to the southwest around 7PM.
Mixing height.......500 ft AGL.
Transport winds.....Southwest 12 to 16 mph.
Ventilation Index...Low (170) decreasing to low (70) overnight.

.WEDNESDAY...

Sky/weather.........Mostly cloudy (75-85 percent). Rain showers
likely through the morning. Chance of rain showers
                    late in the afternoon.
CWR.................75 percent decreasing to 7 percent late in the
                    morning.
Chance of lightning.7 percent.
Max temperature.....44-47.
Min humidity........89-94 percent.
Wind (20 ft)........Southwest winds 5 to 10 mph shifting to the west
6 to 12 mph with gusts to around 22 mph around 10AM.
Ridgetop wind.......Southwest winds 6 to 12 mph with gusts to around
25 mph shifting to the west 8 to 14 mph with gusts to
around 28 mph around 10AM.
Mixing height.......2100 ft AGL.
Transport winds.....Southwest 9 to 12 mph.
Ventilation Index...Low (130) increasing to low (200) in the
                    afternoon.

$$
Forecaster...Lawhorn
Requested by...Adam Lieberg
Type of request...PRESCRIBED
.TAG 2624154.5/PDT
.DELDT 10/27/26
.FormatterVersion 2.0.0
.EMAIL hgavrilov@columbialandtrust.org,alieberg@columbialandtrust.org,jkelly@columbialandtrust.org,mbisio@columbialandtrust.org