158
FNUS76 KPDT 211206
FWSPDT

Spot Forecast for DMPRC...Yakima Training Center FD
National Weather Service Pendleton OR
506 AM PDT Fri Aug 21 2026

Forecast is based on forecast start time of 0700 PDT on August 21.
***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 transport wind
   multiplied by the mixing height in 100`s of ft.
   Categories are a generalized indicator only:
   low (< 200), moderate (200-500), high (500-700),
   and very high (> 700).                           ***

If you have questions or concerns with this forecast, please
contact our office at (541) 276-8134.

...HEAT ADVISORY IN EFFECT UNTIL 10 PM PDT THIS EVENING...
...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SATURDAY EVENING...

.DISCUSSION...

Light northeast winds Today under 10 mph with up to a 10% chance
for isolated showers Tonight. Critical relative humidity around  15%
This Afternoon will recover overnight to around 50%.

.REST OF TODAY...

Sky/weather.........Mostly cloudy (65-75 percent) then becoming
                    mostly sunny (45-55 percent) then becoming
                    cloudy (85-95 percent). Patchy smoke in the
                    morning.
Chance of pcpn......10 percent.
Chance of lightning.2 percent.
Max temperature.....91-94.
Min humidity........12-17 percent.
Surface winds (mph).Light winds becoming northeast 6 to 10 mph in
                    the late morning and early afternoon, then
                    shifting to the east late in the afternoon.
Mixing height.......5000 ft AGL.
Transport winds.....Northeast around 6 mph shifting to the east 6
                    to 8 mph late in the morning.

TIME (PDT)      7 AM   9 AM   11 AM  1 PM   3 PM   5 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............70     75     83     87     90     91
RH..............41     32     24     19     17     17
Surface wind....N 4    NE 6   NE 9   E 9    E 9    E 8
Surface wnd gst.6             10     12     10

.TONIGHT...

Sky/weather.........Mostly cloudy (75-85 percent). Areas of smoke
                    late in the evening.
Chance of pcpn......10 percent.
Chance of lightning.6 percent.
Min temperature.....70-73.
Max humidity........46-51 percent.
Surface winds (mph).North winds 6 to 9 mph early in the evening
                    becoming light, then becoming northwest 6 to 10
                    mph in the late evening and overnight.
Mixing height.......3000 ft AGL early in the evening then 500 ft
                    AGL late in the evening.
Transport winds.....Northeast around 6 mph shifting to the
                    northwest 8 to 12 mph early in the evening.

.SATURDAY...

Sky/weather.........Partly sunny (50-60 percent) then becoming
                    sunny (0-10 percent). Areas of smoke early in
                    the morning, then patchy smoke early in the
                    morning.
Chance of pcpn......10 percent.
Chance of lightning.7 percent.
Max temperature.....Around 90.
Min humidity........22-27 percent.
Surface winds (mph).West winds 6 to 26 mph.
Mixing height.......9700 ft AGL.
Transport winds.....Northwest around 8 mph shifting to the
                    southwest 8 to 16 mph late in the morning, then
                    increasing to west around 22 mph late in the
                    afternoon.

$$
Forecaster...Russell
Requested by...Josh Thompson
Type of request...OTHER
.TAG 2620151.0/PDT
.DELDT 08/21/26
.FormatterVersion 2.0.0
.EMAIL shayne.c.foster.civ@army.mil,joshua.a.thompson36.civ@army.mil