180
FNUS76 KPDT 230148
FWSPDT

Spot Forecast for BARSTOW RD FIRE...WALLA WALLA COUNTY FIRE DIST 4
National Weather Service Pendleton OR
648 PM PDT Sun Jun 22 2025

Forecast is based on forecast start time of 1900 PDT on June 22.
***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...A weak system is passing over the fire area this
evening, providing breezy winds overnight and a slight uptick in
cloud cover. High pressure will be sliding down the coast as skies
clear and winds subside late in the afternoon. Humidities will be
on a downward trend through Wednesday morning as afternoon
humidities are expected to dip into the teens Tuesday.

.REST OF TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent).
Min temperature.....50-53.
Max humidity........72-77 percent.
Wind (20 ft)........Southwest winds 6 to 12 mph shifting to the
                    south 7 to 14 mph with gusts up to 20 mph after
                    9 PM, peaking after 11 PM.
Mixing height.......500 ft AGL in the evening then 700 ft AGL early
                    in the morning.
Transport winds.....Southwest 10 to 12 mph shifting to the south
                    late in the evening.
Ventilation Index...Fair (330) decreasing to poor (30) overnight.

TIME (PDT)      7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM 6AM
Temp............72  69  63  60  58  55  54  53  52  51  50  51
RH..............39  44  51  57  59  64  65  67  70  75  77  77
20 FT wind dir..SW  S   S   S   S   S   S   S   S   S   S   S
20 FT wind spd..9   9   9   12  12  11  10  10  11  12  12  12
20 FT wind gust.13  12  13  14  15  13  13  13  14  16  18  18

.MONDAY...

Sky/weather.........Sunny (5-15 percent).
Max temperature.....81-84.
Min humidity........20-25 percent.
Wind (20 ft)........Southwest winds 7 to 14 mph with gusts up
                    to 20 mph becoming 4 to 8 mph after 4 PM.
Mixing height.......7200 ft AGL.
Transport winds.....Southwest 7 to 13 mph.
Ventilation Index...Poor (170) increasing to good (600) in the
                    afternoon.

$$
Forecaster...Callihan
Requested by...BRANDON MCKINNEY
Type of request...WILDFIRE
.TAG 2516424.0/PDT
.DELDT 06/22/25
.FormatterVersion 2.0.0
.EMAIL imt@wwfire4.com,bmckinney@wwfire4.com