672
FNUS76 KPDT 080502
FWSPDT

Spot Forecast for CM RICE FIRE...WALLA WALLA COUNTY FIRE DISTRICT 4
National Weather Service Pendleton OR
1002 PM PDT Mon Jul 7 2025

Forecast is based on forecast start time of 2200 PDT on July 07.
***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 FROM 11 AM TO 9 PM PDT TUESDAY...
...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY...

.DISCUSSION...An upper-level ridge of high pressure will keep
hot, dry conditions in place through Tuesday. A weak front will
move through the area Tuesday night into Wednesday leading to
cooler temperatures, breezy southwest to west winds, and low
relative humidity on Wednesday.

.REST OF TONIGHT...

Sky/weather.........Mostly clear (0-10 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....62-65.
Max humidity........45-50 percent.
Wind (20 ft)........North winds 4-6 mph shifting to the
                    southeast 5-8 mph overnight, then
                    shifting to the south-southwest early in
                    the morning.
Ridgetop wind.......North winds 4-6 mph shifting to the
                    southeast 5-8 mph overnight, then
                    shifting to the south-southwest early in
                    the morning.
Mixing height.......Decreasing to 300-600 ft AGL overnight.
Transport winds.....Becoming southeast 5-8 mph overnight, then
                    shifting to the south 7-9 mph early morning.
Ventilation Index...Poor (30) overnight.

TIME (PDT)      10P 11P MID 1AM 2AM 3AM 4AM 5AM 6AM 7AM 8AM 9AM
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............78  75  72  69  67  66  65  63  63  68  75  80
RH..............31  33  38  41  42  44  47  48  49  48  42  37
20 FT wind dir..N   E   E   E   SE  SE  SE  S   S   S   SW  SW
20 FT wind spd..5   6   6   6   7   7   7   8   8   8   10  10
20 FT wind gust.                                        11  11

.TUESDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Max temperature.....100-103.
Min humidity........9-14 percent.
Wind (20 ft)........South-southwest winds 6-10 mph early morning,
                    becoming southwest to west winds 7-11 mph with
                    gusts up to 15 mph late morning and afternoon.
Ridgetop wind.......South-southwest winds 6-10 mph early morning,
                    becoming southwest to west winds 7-11 mph with
                    gusts up to 15 mph late morning and afternoon.
Mixing height.......Increasing to 5000-5500 ft AGL by late morning.
Transport winds.....Southwest 8-12 mph.
Ventilation Index...Poor (100) increasing to fair (430) in the
                    afternoon.

.TUESDAY NIGHT...

Sky/weather.........Partly cloudy (15-35 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Min temperature.....63-66.
Max humidity........60-65 percent.
Wind (20 ft)........Southwest winds 6-10 mph with gusts up to 15 mph.
Ridgetop wind.......Southwest winds 6-10 mph with gusts up to 15 mph.
Mixing height.......Decreasing to 400-600 ft AGL overnight.
Transport winds.....West to southwest 8-12 mph.
Ventilation Index...Fair (260) decreasing to poor (50) overnight.

$$
Forecaster...Plunkett
Requested by...BRANDON MCKINNEY
Type of request...WILDFIRE
.TAG 2517509.1/PDT
.DELDT 07/07/25
.FormatterVersion 2.0.0
.EMAIL imt@wwfire4.com,bmckinney@wwfire4.com