179
FNUS76 KPDT 010121
FWSPDT

Spot Forecast for Wildcat...USFS
National Weather Service Pendleton OR
621 PM PDT Sun Aug 31 2025

Forecast is based on forecast start time of 0600 PDT on September 01.
***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...Areas of smoke will persist as winds remain light and
mostly variable up to 5 mph. Warm and dry conditions continue with normal
upslope/downslope cycles with no expected wetting rains. Temperatures
will warm up into the low 80s, with min RH dropping to the mid-30s.
Overnight recoveries will be good to excellent, with min RHs being
drier on Tuesday.


.LABOR DAY...

Sky/weather.........Mostly sunny (25-35 percent). Areas of smoke.
CWR.................0 percent.
Chance of lightning.3 percent.
Max temperature.....74-78.
Min humidity........34-39 percent.
Wind (20 ft)........Light morning downslope winds up to 5 mph shifting
                    to the Southwest up to 5 mph at around 2 PM, then
                    shifting to the west up to 5 mph at around 5 PM.
Ridgetop wind.......Light morning downslope winds at 4-8 mph shifting
                    to the Southwest at 4-8 mph at around 2 PM, then
                    shifting to the west at 4-8 mph at around 5 PM.
Mixing height.......5600 ft AGL early in the morning.
Transport winds.....Southeast around 8 mph.
Ventilation Index...Poor (30) increasing to fair (470) in the
                    afternoon.

.MONDAY NIGHT...

Sky/weather.........Partly cloudy (40-50 percent). Areas of smoke.
CWR.................0 percent.
Chance of lightning.2 percent.
Min temperature.....Around 57.
Max humidity........74-79 percent.
Wind (20 ft)........West winds around 5 mph, then shifting to the
                    southeast up to 5 mph around 9 PM.
Ridgetop wind.......West winds at 4-8 mph, then shifting to the
                    southeast at 4-8 mph at around 9 PM.
Mixing height.......1400 ft AGL early in the evening.
Transport winds.....Light winds.
Ventilation Index...Poor (30).

.TUESDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....80-83.
Min humidity........24-29 percent.
Wind (20 ft)........Light morning downslope winds becoming southeast
                    5-8 mph by 11 AM, then shifting to the
                    northwest at 4-7 mph at around 5 PM.
Ridgetop wind.......Light morning downslope winds becoming southeast
                    7-10 mph by 11 AM, then shifting to the
                    northwest at 6-9 mph at around 5 PM.
Mixing height.......9100 ft AGL late in the morning.
Transport winds.....South around 10 mph.
Ventilation Index...Poor (30) increasing to excellent (770) in the
                    afternoon.

$$
Forecaster...Day
Requested by...Aana Kulaas
Type of request...WILDFIRE
.TAG 2520977.2/PDT
.DELDT 08/31/25
.FormatterVersion 2.0.0
.EMAIL aana_kulaas@firenet.gov,joseph.landburg@usda.gov