702
FNUS76 KPDT 150250
FWSPDT

Spot Forecast for Highland Fire...COFMS / OSFM
National Weather Service Pendleton OR
750 PM PDT Mon Jul 14 2025

Forecast is based on forecast start time of 0600 PDT on July 15.
***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...NOTE:Forecast lat/long moved to 44.2227N, -120.8093W
Breezy northwest to north winds will continue Tuesday, becoming light
Tuesday night then increasing from the north up to 12 mph Wednesday.
The afternoon RHs will be in the low 20s tomorrow, and mid teens
Wednesday. Overnight will be good. Developing low level inversion
will trap smoke near the surface after midnight into Tuesday
and Wednesday mornings. Temperatures will increase again starting
Wednesday.

.TUESDAY...

Sky/weather.........Sunny (0-10 percent). Haze late in the morning.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....81-84.
Min humidity........21-26 percent.
Wind (20 ft)........Northwest winds 5 to 10 mph shifting to the
                    north 10 to 17 mph after 11AM.
Ridgetop wind.......North winds 7 to 12 mph increasing to 12 to
20 mph after 11AM.
Mixing height.......5400 ft AGL early in the morning.
Transport winds.....North 5 to 13 mph increasing to 15 to 18 mph
                    late in the afternoon.
Ventilation Index...Poor (60) increasing to good (620) in the
                    afternoon.

TIME (PDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............50     59     67     74     79     81
RH..............63     52     40     32     28     26
20 ft wind......NW 6   NW 8   NW 8   N 13   N 14   N 16
20 ft wind gust.7      11     11     18     19     19

.TUESDAY NIGHT...

Sky/weather.........Clear (0-10 percent). Haze in the evening.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....49-52.
Max humidity........65-70 percent.
Wind (20 ft)........North winds 10 to 17 mph shifting to the
                    northeast 5 to 8 mph around 11PM, then
                    becoming drainage after 1AM.
Ridgetop wind.......North winds 11 to 18 mph shifting to the
northeast 5 to 10 mph around 11PM, then
shifting to the east around 5 mph around 5AM.
Mixing height.......1400 ft AGL in the evening.
Transport winds.....Northeast 9 to 17 mph decreasing to around 5
                    mph overnight, then shifting to the east early
                    in the morning.
Ventilation Index...Fair (440) decreasing to poor (30) overnight.

.WEDNESDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 90.
Min humidity........13-18 percent.
Wind (20 ft)........Drainage winds becoming north 5 to 12 mph around
12PM.
Ridgetop wind.......East winds around 5 mph becoming northwest winds
5 to 12 mph around 12PM.
Mixing height.......5900 ft AGL early in the morning.
Transport winds.....East around 5 mph early in the morning becoming
                    light, then becoming west 5 to 8 mph late in
                    the morning shifting to the northwest around 12
                    mph.
Ventilation Index...Poor (30) increasing to poor (200) in the
                    afternoon.

$$
Forecaster...Lawhorn
Requested by...Fred Patterson
Type of request...WILDFIRE
.TAG 2518024.0/PDT
.DELDT 07/14/25
.FormatterVersion 2.0.0
.EMAIL fppatterson@live.com