787
FNUS76 KOTX 300303
FWSOTX

Spot Forecast for Grande Fire...NE WA IMT #1
National Weather Service Spokane WA
803 PM PDT Fri Aug 29 2025

Forecast is based on forecast start time of 2000 PDT on August 29.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Bands of showers and thunderstorms roughly 1 to 2 miles southwest of the
fire will slowly drift toward the fire area between 2000-2100.  With the loss
of heating, these storms are expected to weaken with time.  After 2100, expect
activity to dissipate with clearing skies overnight.  Tomorrow will be warmer
and drier.  Cumulus clouds will develop with morning heating with a small
threat for a light shower before 1300 then shower chances will decrease
in the afternoon.  Winds will be breezy from the southwest with gusts
around 18 mph.

.REST OF TONIGHT...

Sky/weather.........Mostly cloudy with showers and thunderstorms through
                    2100 becoming mostly clear around 0100.
CWR.................10 percent.
Chance of lightning.40 percent.
Min temperature.....61.
Max humidity........57 percent.
Wind (20 ft)........Gusty and erratic winds mainly from southwest 4 to 9 mph
                    gusts to 18 mph through 2100 becoming variable then downslope
                    2 to 4 mph.
Mixing height.......Falling near surface by 2200.
Transport winds.....Southwest around 8 mph early in the evening becoming
                    southwest around 3 mph.

.SATURDAY...

Sky/weather.........Mostly sunny in the morning becoming partly cloudy
                    with cumulus buildups.  A 10% chance for a shower
                    before 1400 decreasing 5% after 1400.
CWR.................5 percent.
Chance of lightning.5 percent.
Max temperature.....80.
Min humidity........18 percent.
Wind (20 ft)........Light downslope winds 2 to 4 mph becoming southwest
                    6 to 10 mph gusts to 18 mph after 1300.
Mixing height.......7500 ft AGL in the afternoon.
Transport winds.....Light winds becoming southwest around 13 mph in
                    the afternoon.

.SATURDAY NIGHT...

Sky/weather.........Partly cloudy.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....64.
Max humidity........38 percent.
Wind (20 ft)........Southwest winds around 9 mph shifting to the
                    northeast 2 to 5 mph overnight.
Mixing height.......6500 ft AGL falling to 0 ft AGL.
Transport winds.....Southwest around 7 mph shifting to the east around
                    6 mph overnight.

$$
Forecaster...SB
Requested by...Jessica Walston
Type of request...WILDFIRE
.TAG 2520874.3/OTX
.DELDT 08/29/25
.FormatterVersion 2.0.0
.EMAIL jessica.walston@dnr.wa.gov