695
FNUS76 KPDT 202249
FWSPDT

Spot Forecast for Highway 24 Tumbleweeds...USFWS
National Weather Service Pendleton OR
249 PM PST Tue Jan 20 2026

Forecast is based on ignition time of 0600 PST on January 21.
***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...Low stratus is forecast to blanket the site through
the forecast period (Thursday), with small diurnal variations in
temperature and humidity. Generally light winds of 5 mph or less,
predominantly from the north to northwest, with some periods of
more variable winds anticipated.

.WEDNESDAY...

Sky/weather.........Overcast (95-100 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....34-37.
Min humidity........65-70 percent.
Wind (20 ft)........North winds 3-5 mph becoming west 2-5 mph in the
                    late morning and early afternoon.
Mixing height.......Increasing to 1200-1700 ft AGL by late morning.
Transport winds.....North 2-5 mph.
Ventilation Index...Poor (30-70).

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............26  25  26  28  30  31  33  34  34  35  34  32
RH..............87  88  88  84  80  79  72  72  69  68  71  76
20 FT wind dir..N   N   N   N   W   W   W   W   W   W   W   W
20 FT wind spd..4   4   4   4   5   5   5   5   5   5   4   4
20 FT wind gust.

.WEDNESDAY NIGHT...

Sky/weather.........Overcast (95-100 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....25-28.
Max humidity........85-90 percent.
Wind (20 ft)........North to northwest 2-6 mph.
Mixing height.......Decreasing to 400-600 ft AGL overnight.
Transport winds.....North-northwest winds 2-5 mph.
Ventilation Index...Poor (10-30).

.THURSDAY...

Sky/weather.........Overcast (95-100 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....35-38.
Min humidity........65-70 percent.
Wind (20 ft)........North to northwest 2-5 mph.
Mixing height.......Increasing to 1400-1800 ft AGL by late morning.
Transport winds.....North 2-5 mph.
Ventilation Index...Poor (30-90).

$$
Forecaster...Plunkett
Requested by...Thomas Boggs
Type of request...PRESCRIBED
.TAG 2528436.4/PDT
.DELDT 01/20/26
.FormatterVersion 2.0.0
.EMAIL thomas_boggs@fws.gov