638
FNUS76 KPDT 080118
FWSPDT

Spot Forecast for Trapper...USFS
National Weather Service Pendleton OR
618 PM PDT Sun Jun 7 2026

Forecast is based on forecast start time of 1900 PDT on June 07.
***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 weak, transient ridge of high pressure moves
across the fire area this evening, ahead of another system that
will increase cloud cover tonight and again by late Monday
morning. Winds will increase mid-morning and stay breezy through
the afternoon as showers occur after 1700 and persist overnight.
Very high ventilation anticipated as instability will be present.
However, storm chances remain low due to late timing of system.

.REST OF TONIGHT...

Sky/weather.........Mostly clear (15-25 percent) then becoming
                    mostly cloudy (50-75 percent) after 2300.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....44-48.
Max humidity........44-49 percent.
Wind (20 ft)........West winds around 5 mph early in the evening
                    becoming light.
Ridgetop wind.......West winds 3 to 6 mph early in the evening
                    becoming light.
Mixing height.......500 ft AGL.
Transport winds.....Southwest 5 to 13 mph shifting to the south 5
                    to 7 mph late in the evening.
Ventilation Index...Moderate (210) decreasing to low (30)
                    overnight.

TIME (PDT)      7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM 6AM
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............60  58  53  50  48  46  46  46  45  45  45  44
RH..............27  33  35  37  39  41  42  43  44  45  46  46
20 FT wind dir..W   W   W   SW  SW  SW  S   SW  SE  S   SW  SW
20 FT wind spd..5   3   2   2   1   2   1   2   2   2   2   3
20 FT wind gust.7

.MONDAY...

Sky/weather.........Mostly cloudy (70-80 percent) then becoming
                    mostly sunny (30-40 percent) after 0700 then
                    becoming mostly cloudy (75-85 percent) after
                    noon. A 70-80 percent chance of rain showers
                    after 1700.
CWR.................0 percent increasing to 51 percent late in the
                    afternoon.
Chance of lightning.6 percent.
Max temperature.....66-71.
Min humidity........28-32 percent.
Wind (20 ft)........Light winds becoming south 5 to 10 mph by 0900
                    , becoming 6 to 12 mph with gusts up to 20 mph
                    after 1100 then shifting to the southwest after
                    1400. Winds peak between 1300-1600.
Ridgetop wind.......Light winds becoming south 6 to 12 mph by 0900
                    , becoming 7 to 14 mph with gusts up to 22 mph
                    after 1100 then shifting to the southwest after
                    1400. Winds peak between 1300-1600.
Mixing height.......6500 ft AGL.
Transport winds.....South 7 to 14 mph increasing to 15 to 21 mph
                    late in the morning.
Ventilation Index...Low (150) increasing to very high (1050) in the
                    afternoon.

.MONDAY NIGHT...

Sky/weather.........Cloudy (90-100 percent). 90-100 percent chance
                    of rain showers after 1100.
CWR.................51 percent increasing to 97 percent late in the
                    evening.
Chance of lightning.13 percent.
Min temperature.....50-55.
Max humidity........95-100 percent.
Wind (20 ft)........Southwest winds 6 to 12 mph with gusts up to 20
                    mph becoming 2 to 5 mph after 2000.
Ridgetop wind.......Southwest winds 7 to 14 mph with gusts up to 22
                    mph becoming 3 to 7 mph after 2000.
Mixing height.......500 ft AGL.
Transport winds.....Southwest 12 to 21 mph.
Ventilation Index...Moderate (220) decreasing to low (80)
                    overnight.

$$
Forecaster...Callihan
Requested by...Incident Commander
Type of request...WILDFIRE
.TAG 2615097.2/PDT
.DELDT 06/07/26
.FormatterVersion 2.0.0
.EMAIL orbmc@firenet.gov