101
FNUS76 KPDT 161726
FWSPDT

Spot Forecast for Highland...USFS
National Weather Service Pendleton OR
1026 AM PDT Wed Jul 16 2025

Forecast is based on forecast start time of 0600 PDT on July 17.
***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...Hot, dry, and periodically breezy conditions are
forecast through the remainder of the week. Winds will be diurnally
driven, strongest from the northwest in the afternoon and evening hours.
Confidence is increasing that winds and RHs will be near Red Flag
criteria both Thursday and Friday afternoon/evening. Overnight RH
recovery is expected to be moderate.

.THURSDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....91-94.
Min humidity........10-15 percent.
Wind (20 ft)........Drainage winds 2-6 mph early morning, becoming
                    southwest to west winds 3-6 mph mid-morning, then
                    becoming northwest 7-12 mph with gusts of 15-20
                    mph late morning and afternoon.
Ridgetop wind.......South winds 2-6 mph early morning, southwest to
                    west winds 4-7 mph mid-morning, then becoming
                    northwest 8-13 mph with gusts of 17-22 mph late
                    morning and afternoon.
Mixing height.......Increasing to 7500-8000 ft AGL by afternoon.
Transport winds.....South to southwest 4-8 mph through mid-morning,
                    becoming west-northwest 12-18 mph late morning
                    and afternoon.
Ventilation Index...Poor (30) increasing to good (660) 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............57  62  67  72  76  80  83  86  88  91  92  91
RH..............53  48  41  35  30  27  24  20  16  13  12  15
20 FT wind dir..SE  SE  S   SW  SW  NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..4   4   4   6   5   7   7   7   12  12  12  15
20 FT wind gust.                9   12  12  12  17  17  17  20

.THURSDAY NIGHT...

Sky/weather.........Mostly clear (0-10 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....54-57.
Max humidity........49-54 percent.
Wind (20 ft)........Northwest winds 9-14 mph with gusts of 15-20
                    mph in the evening, becoming drainage 1-4 mph
                    overnight.
Ridgetop wind.......Northwest winds 11-16 mph with gusts of 17-22
                    mph in the evening, becoming variable 2-5 mph
                    overnight.
Mixing height.......Decreasing to 300-600 ft AGL overnight.
Transport winds.....Northwest 12-18 mph in the evening, becoming
                    variable 3-6 mph overnight.
Ventilation Index...Excellent (720) decreasing to poor (30)
                    overnight.

.FRIDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....89-92.
Min humidity........10-15 percent.
Wind (20 ft)........Drainage winds 1-4 mph early morning, becoming
                    becoming northwest 5-10 mph mid- to late morning,
                    increasing to 9-14 mph with gusts of 15-20 mph in
                    the afternoon.
Ridgetop wind.......South winds 2-5 mph early morning, becoming
                    becoming northwest 5-10 mph mid- to late morning,
                    increasing to 10-15 mph with gusts of 17-22 mph in
                    the afternoon.
Mixing height.......Increasing to 8000-8500 ft AGL by afternoon.
Transport winds.....Southwest 4-8 mph early morning, becoming west
                    8-12 mph late morning, then northwest 15-20 mph in
                    the afternoon.
Ventilation Index...Poor (30) increasing to excellent (730) in the
                    afternoon.

$$
Forecaster...Plunkett
Requested by...Kathy Reed
Type of request...WILDFIRE
.TAG 2518121.0/PDT
.DELDT 07/16/25
.FormatterVersion 2.0.0
.EMAIL katherine.reed@usda.gov