841
FNUS76 KPDT 041404
FWSPDT

Spot Forecast for Heppner Pile Burning...USFS-Heppner Ranger District
National Weather Service Pendleton OR
604 AM PST Wed Nov 4 2026

Forecast is based on ignition time of 0700 PST on November 04.
***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...Dry conditions will prevail through the forecast
period. Light winds to start before becoming S after 1000 then
light again after 1300. Daytime humidity will be above 40% with
overnight recoveries above 80% and southwest winds 5-7 mph
overnight. Thursday will see humidity above 50% with SW winds
in the morning becoming light after 1400.

.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent) then becoming partly
                    sunny (50-60 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....51-54.
Min humidity........46-51 percent.
Wind (20 ft)........Light winds becoming south 5 to 7 mph late in
                    the morning, then becoming light in the
                    afternoon.
Mixing height.......2200 ft AGL in the late morning and afternoon.
Transport winds.....Southwest 5 to 6 mph.
Ventilation Index...Low (30-80).

TIME (PST)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............31  33  38  41  45  48  49  51  49  47  45  41
RH..............91  86  77  69  62  56  51  49  50  59  62  69
20 FT wind dir..W   SW  SW  S   S   S   SW  SW  N   N   N   N
20 FT wind spd..3   4   5   5   5   5   4   3   2   2   2   2
20 FT wind gust.5   6   6   7   7   7   7   6   5   4   4   4

.TONIGHT...

Sky/weather.........Cloudy (85-95 percent). Slight chance of rain
                    showers late in the evening. Chance of rain
                    showers overnight, then slight chance of rain
                    showers after 3 am.
CWR.................3 percent.
Chance of lightning.0 percent.
Min temperature.....Around 40.
Max humidity........84-89 percent.
Wind (20 ft)........Light winds becoming southwest 5 to 7 mph
                    overnight.
Mixing height.......600 ft AGL early in the evening then 500 ft AGL
                    in the late evening and overnight.
Transport winds.....West 6 to 9 mph.
Ventilation Index...Low (30-40) increasing to low (40-60)
                    overnight.

.THURSDAY...

Sky/weather.........Mostly cloudy (75-85 percent) then becoming
                    mostly sunny (20-30 percent). Slight chance of
                    rain showers early in the morning.
CWR.................1 percent.
Chance of lightning.0 percent.
Max temperature.....Around 50.
Min humidity........52-57 percent.
Wind (20 ft)........Southwest winds 5 to 7 mph in the morning and
                    early afternoon becoming light.
Mixing height.......3500 ft AGL.
Transport winds.....West 7 to 12 mph.
Ventilation Index...Low to moderate (60-310) decreasing to low to
                    moderate (30-310) in the afternoon.

$$
Forecaster...Bennese
Requested by...Shaun Mullins
Type of request...PRESCRIBED
.TAG 2624889.2/PDT
.DELDT 11/04/26
.FormatterVersion 2.0.0
.EMAIL shaun.mullins@usda.gov