900
FNUS76 KPDT 030449
FWSPDT

Spot Forecast for Labor Mountain...USFS
National Weather Service Pendleton OR
949 PM PDT Tue Sep 2 2025

Forecast is based on forecast start time of 0600 PDT on September 03.
***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.

...HEAT ADVISORY IN EFFECT UNTIL 8 PM PDT THURSDAY...

.DISCUSSION...Hot, dry weather will continue through Thursday.
Minimum RHs will be low with poor to moderate overnight RH recovery.
Winds will be diurnally and terrain-driven.

.WEDNESDAY...

Sky/weather.........Mostly sunny (10-25 percent). Haze.
CWR.................0 percent.
Chance of lightning.1 percent.
Max temperature.....89-92.
Min humidity........14-19 percent.
Wind (20 ft)........Upslope winds 2-5 mph.
Ridgetop wind.......Upslope winds 2-5 mph.
Mixing height.......Increasing to 10500-11000 ft AGL by afternoon.
Transport winds.....North 4-6 mph.
Ventilation Index...Poor (60) increasing to fair (290) in the
                    afternoon.

.WEDNESDAY NIGHT...

Sky/weather.........Partly cloudy (35-45 percent). Haze in the
                    evening.
CWR.................0 percent.
Chance of lightning.2 percent.
Min temperature.....70-73.
Max humidity........35-40 percent.
Wind (20 ft)........North to northeast winds 5-8 mph.
Ridgetop wind.......North to northeast winds 5-8 mph.
Mixing height.......Decreasing to 500-900 ft AGL overnight.
Transport winds.....Northeast 6-9 mph.
Ventilation Index...Fair (230) decreasing to poor (60) overnight.

.THURSDAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
Chance of lightning.2 percent.
Max temperature.....87-90.
Min humidity........19-24 percent.
Wind (20 ft)........Upslope winds 2-6 mph.
Ridgetop wind.......East winds 5-10 mph.
Mixing height.......Increasing to 10500-1100 ft AGL by afternoon.
Transport winds.....East to southeast 5-10 mph.
Ventilation Index...Poor (30) increasing to fair (460) in the
                    afternoon.

$$
Forecaster...Plunkett
Requested by...Nicholas Steel
Type of request...WILDFIRE
.TAG 2521175.0/PDT
.DELDT 09/02/25
.FormatterVersion 2.0.0
.EMAIL nicholas.steel@usda.gov