408
FNUS76 KPDT 171645
FWSPDT

Spot Forecast for Whaluke Slope RX...USFWS
National Weather Service Pendleton OR
845 AM PST Mon Nov 17 2025

Forecast is based on ignition time of 0600 PST on November 18.
***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 the
   transport wind multiplied by the mixing
   height in 100`s of feet. Index categories
   are a generalized indicator only.***

If you have questions or concerns with this forecast, please
contact our office at (541) 276-8134.

.DISCUSSION...An area of high pressure will move across the coast
of the PacNW, bringing dry conditions coupled with light winds
through the period. Winds will shift from a west nature to a more
northern direction Wednesday but will remain weak at less than 10
mph for the vast majority of the period. Min RH`s will hover around
the 50s to 60s, with `Excellent` overnight recoveries.

.TUESDAY...

Sky/weather.........Mostly sunny (40-50 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....50-55.
Min humidity........50-55 percent.
Wind (20 ft)........West-southwest 5 to 10 mph.
Ridgetop wind.......
Mixing height.......2900 ft AGL in the late morning and afternoon.
Transport winds.....West 10 to 15 mph.
Ventilation Index...Fair (140).

TIME (PST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............41  40  42  44  47  49  50  51  50  49  48  46
RH..............84  83  82  76  68  62  56  54  55  59  63  67
20 FT wind dir..W   SW  SW  SW  W   W   W   W   W   W   W   W
20 FT wind spd..7   7   7   7   8   8   8   8   8   8   7   7
20 FT wind gust.                10  10  10  10  10  10

.TUESDAY NIGHT...

Sky/weather.........Mostly cloudy (40-60 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....34-39.
Max humidity........85-90 percent.
Wind (20 ft)........West winds 5 to 10 mph then shifting to the
                    Northwest at 4 to 8 mph by 1 AM
Ridgetop wind.......
Mixing height.......500 ft AGL early in the evening.
Transport winds.....West 8 to 13 mph in the evening becoming light.
Ventilation Index...Poor (50).

.WEDNESDAY...

Sky/weather.........Mostly sunny (30-40 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....47-52.
Min humidity........60-65 percent.
Wind (20 ft)........Light winds becoming Northeast 5 to 10 mph by
                    10 AM.
Ridgetop wind.......
Mixing height.......2300 ft AGL in the late morning and afternoon.
Transport winds.....Light winds becoming northeast 5 to 10 mph.
Ventilation Index...Poor (60)

$$
Forecaster...Day
Requested by...Thomas Boggs
Type of request...PRESCRIBED
.TAG 2526134.0/PDT
.DELDT 11/17/25
.FormatterVersion 2.0.0
.EMAIL thomas_boggs@fws.gov