584
FNUS76 KPDT 200441
FWSPDT

Spot Forecast for North Fork Lmuma...USWFS
National Weather Service Pendleton OR
941 PM PDT Wed Aug 19 2026

Forecast is based on forecast start time of 2200 PDT on August 19.
***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 persist over the fire area through
the forecast period. Light and variable winds will become SW 5-7 mph
after 1600 with min humidity in the low teens. Afternoon winds will
from the W around 7 mph shifting N 5-9 mph after 1900 becoming light
overnight with recoveries in the low 40%. Light winds will start the
day Friday before shifting E 5-7 mph after 1100, then S after 1600.
Min humidity will be in the low teens.

.THURSDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....94-97.
Min humidity........12-17 percent.
Wind (20 ft)........Light winds becoming southwest 5 to 7 mph after
                    1600.
Ridgetop wind.......Variable winds 4 to 6 mph becoming southwest 7
                    to 9 mph after 1600.
Mixing height.......6900 ft AGL.
Transport winds.....North 7 to 9 mph in the morning becoming light,
                    then becoming west 6 to 7 mph late in the
                    afternoon.
Ventilation Index...Low (60) increasing to moderate (250) in the
                    afternoon.

.THURSDAY NIGHT...

Sky/weather.........Mostly clear (15-25 percent) then becoming
                    mostly cloudy (60-70 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....65-68.
Max humidity........40-45 percent.
Wind (20 ft)........West winds around 5 mph shifting to the north 5
                    to 9 mph after 1900, then becoming light
                    overnight.
Ridgetop wind.......West winds around 7 mph shifting to the north 7
                    to 11 mph after 1900, then becoming light
                    overnight.
Mixing height.......500 ft AGL.
Transport winds.....West around 6 mph shifting to the north 7 to 12
                    mph early in the evening.
Ventilation Index...Low (190) decreasing to low (40) overnight.

.FRIDAY...

Sky/weather.........Mostly cloudy (80-90 percent).
CWR.................0 percent.
Chance of lightning.2 percent.
Max temperature.....94-97.
Min humidity........13-18 percent.
Wind (20 ft)........Light winds becoming east 5 to 7 mph after 1100,
                    then shifting to the south around 5 mph after
                    1600.
Ridgetop wind.......Variable winds 4 to 6 mph becoming east 7 to 9
                    mph after 1100, then shifting to the south around
                    7 mph after 1600.
Mixing height.......7200 ft AGL.
Transport winds.....Northeast around 7 mph shifting to the south 6
                    to 8 mph late in the morning.
Ventilation Index...Low (40) increasing to moderate (330) in the
                    afternoon.

$$
Forecaster...Bennese
Requested by...Christian Meyer
Type of request...WILDFIRE
.TAG 2620066.0/PDT
.DELDT 08/19/26
.FormatterVersion 2.0.0
.EMAIL christian_meyer@fws.gov