662
FNUS76 KPDT 081852
FWSPDT

Spot Forecast for Forth RTRL RX...BIA
National Weather Service Pendleton OR
1152 AM PDT Wed Oct 8 2025

Forecast is based on ignition time of 1200 PDT on October 08.
***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...

Last observation before burn time was 68 degrees with
a sse wind around 5 mph and gusts around 11 mph and
relative humidity at 26%. Look for minimal change in
these conditions into the early afternoon as temperatures
will only climb a couple of more degrees.



.REST OF TODAY...

Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Max temperature.....Around 70.
Min humidity........20-25 percent.
Wind (20 ft)........Southwest winds 5 to 7 mph in the afternoon
                    becoming light.
Ridgetop wind.......
Mixing height.......6400 ft AGL.
Transport winds.....Southwest around 16 mph becoming south around 6
                    mph late in the afternoon.
Ventilation Index...Excellent (780).

TIME (PDT)      NOON   2 PM   4 PM   6 PM   8 PM   10 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............65     66     65     59     52     48
RH..............27     26     29     35     47     54
20 ft wind......S 6    SW 6   SW 6   N 4    S 4    S 4
20 ft wind gust.13     13     13     10     6      6

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Min temperature.....44-47.
Max humidity........50-55 percent.
Wind (20 ft)........Light winds becoming southeast 5 to 7 mph late
                    in the evening.
Ridgetop wind.......11-15 mph
Mixing height.......1300 ft AGL early in the evening.
Transport winds.....Southeast 6 to 13 mph.
Ventilation Index...Poor (50) decreasing to poor (30) overnight.

.THURSDAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Max temperature.....66-69.
Min humidity........25-30 percent.
Wind (20 ft)........Southeast winds 5 to 7 mph shifting to the
                    northeast late in the afternoon, then becoming
                    light late in the afternoon.
Ridgetop wind.......10-13 mph
Mixing height.......4000 ft AGL early in the morning.
Transport winds.....South 8 to 13 mph shifting to the northeast
                    late in the afternoon.
Ventilation Index...Poor (40) increasing to fair (350) in the
                    afternoon.

$$
Forecaster...Russell
Requested by...Joseph Winckler
Type of request...PRESCRIBED
.TAG 2523182.0/PDT
.DELDT 10/08/25
.FormatterVersion 2.0.0
.EMAIL joseph.winckler@bia.gov