386
FNUS76 KPDT 151647
FWSPDT

Spot Forecast for Highland Fire...COFMS / OSFM
National Weather Service Pendleton OR
947 AM PDT Tue Jul 15 2025

Forecast is based on forecast start time of 0600 PDT on July 16.
***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...Winds will back down on Wednesday after a breezy
Tuesday, however RH recoveries will steadily worsen as a warming
trend takes hold over the rest of the work week. A weak front is
expected to move through the region on Thursday, which will make
for another day of low RHs and breezy winds.

.WEDNESDAY...

Sky/weather.........Sunny (0-10 percent). Haze.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 90.
Min humidity........13-18 percent.
Wind (20 ft)........Light winds early, becoming Northwest
                    5 to 10 mph late in the morning.
Ridgetop wind.......Light winds early, becoming Northwest
                    6 to 12 mph by the afternoon.
Mixing height.......5100 ft AGL.
Transport winds.....Light winds becoming Northwest 8 to 12 mph late
                    in the afternoon.
Ventilation Index...Poor (30) increasing to poor (190) in the
                    afternoon.

TIME (PDT)      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............50  54  58  62  68  73  77  81  83  85  87  88
RH..............68  64  55  47  40  35  30  25  22  20  18  18
20 FT wind dir..SE  SE  SE  SE  SE  NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..3   3   3   3   3   5   5   5   8   8   8   11
20 FT wind gust.4   4   4   4   4   6   6   6   12  12  12  14

.WEDNESDAY NIGHT...

Sky/weather.........Mostly clear (0-10 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....55-58.
Max humidity........51-56 percent.
Wind (20 ft)........Northwest winds 5 to 10 mph early in the evening,
                    shifting to the Southwest around 5 mph overnight.
Ridgetop wind.......Northwest 6 to 12 mph, shifting more Southwest
                    overnight.
Mixing height.......1300 ft AGL early in the evening, then near-
                    surface overnight.
Transport winds.....West-Northwest 6 to 12 mph.
Ventilation Index...Fair (310-340) decreasing to poor (30)
                    overnight.

.THURSDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....90-93.
Min humidity........12-17 percent.
Wind (20 ft)........Southwest winds around 5 mph early, becoming
                    Northwest 7 to 14 mph by the afternoon.
Ridgetop wind.......Southwest winds 5 to 8 mph early, becoming
                    Northwest 10 to 20 mph by the afternoon.
Mixing height.......7500 ft AGL.
Transport winds.....West around 8 mph early in the morning,
                    shifting to the Northwest around 16 mph
                    by the afternoon.
Ventilation Index...Poor (30) increasing to good (580-590) in the
                    afternoon.

$$
Forecaster...Evans
Requested by...Fred Patterson
Type of request...WILDFIRE
.TAG 2518049.0/PDT
.DELDT 07/15/25
.FormatterVersion 2.0.0
.EMAIL fppatterson@live.com