881
FNUS76 KPDT 040241
FWSPDT

Spot Forecast for Labor Mountain...USFS
National Weather Service Pendleton OR
741 PM PDT Wed Sep 3 2025

Forecast is based on forecast start time of 0600 PDT on September 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 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.

...RED FLAG WARNING IN EFFECT UNTIL 9 PM PDT THURSDAY...
...HEAT ADVISORY IN EFFECT UNTIL 8 PM PDT THURSDAY...

.DISCUSSION...Hot, dry and unstable conditions will persist over the
fire area through tomorrow night. Daytime min RHs will be below 25%
with overnight recoveries below 50% with recoveries even lower along
the thermal belts. Winds will be mostly light below 10 mph and varying
from the southeast each day after the inversion lifts. The inversion
is expected to lift each between 1030-1100 and unstable conditions will
quickly follow.

.THURSDAY...

Sky/weather.........Sunny (20-30 percent). Areas of smoke.
CWR.................0 percent.
Chance of lightning.2 percent.
Max temperature.....86-89.
Min humidity........19-24 percent.
Wind (20 ft)........Upslope/up-valley winds becoming southeast around
                    5 mph around 2 PM.
Ridgetop wind.......Upslope/up-valley winds then southeast 5 to 7 mph
                    around 2 PM.
Mixing height.......9400 ft AGL.
Transport winds.....Southeast around 5 mph.
Ventilation Index...Poor (40) increasing to fair (310) in the
                    afternoon.

.THURSDAY NIGHT...

Sky/weather.........Partly cloudy (20-30 percent). Areas of smoke.
CWR.................0 percent.
Chance of lightning.5 percent.
Min temperature.....66-69.
Max humidity........41-46 percent.
Wind (20 ft)........Downslope/down-valley winds overnight.
Ridgetop wind.......Downslope/down-valley winds overnight.
Mixing height.......700 ft AGL.
Transport winds.....Northeast around 9 mph.
Ventilation Index...Poor (110) decreasing to poor (60) overnight.

.FRIDAY...

Sky/weather.........Sunny (5-15 percent). Areas of smoke in the
                    morning.
CWR.................0 percent.
Chance of lightning.2 percent.
Max temperature.....82-85.
Min humidity........24-29 percent.
Wind (20 ft)........Upslope/up-valley winds becoming southeast around 5
                    mph around 11 AM.
Ridgetop wind.......Upslope/up-valley winds becoming southeast around 7
                    mph around 11 AM.
Mixing height.......8800 ft AGL.
Transport winds.....East around 7 mph.
Ventilation Index...Poor (70) increasing to fair (310) in the
                    afternoon.

$$
Forecaster...Bennese
Requested by...Aana Kulaas
Type of request...WILDFIRE
.TAG 2521295.0/PDT
.DELDT 09/03/25
.FormatterVersion 2.0.0
.EMAIL nicholas.wigle@usda.gov,aana_kulaas@firenet.gov