632
FNUS76 KOTX 300035
FWSOTX

Spot Forecast for Martin...USFS
National Weather Service Spokane WA
535 PM PDT Fri Aug 29 2025

Forecast is based on forecast start time of 0500 PDT on August 30.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

A deep low pressure system churning off the WA Coast through Monday
will keep the region under southerly flow aloft with passing mid and
clouds.  Weak impulses coming through will bring a 10-20% chance
for showers or thunderstorms Sunday into Monday with low probabilities
for wetting rains.  Winds at the fire will be light shifting from
upslope during the day to down drainage at night.  Small changes in
temps and RH Friday into Saturday then a subtle warming trend Sunday
into Monday.  A strong ridge of high pressure will build in Tuesday
through Thursday with very warm temperatures and dry conditions. Highs will
be in the 80s with afternoon humidity around 25%.  Expect poor relative humidity
recoveries within the thermal belts on the midslopes.

Extended outlook for Sep 5-8th:  There is a 60% chance for the ridge
to begin breaking down around the 5-6th of September.  This will lead to
increasing risk for westerly winds across the fire area along with a
deepening marine layer and higher humidity values into the Martin Fire
with time. The breakdown will also bring increasing chances for showers
and thunderstorms but details remain far from certain at this time.

.TONIGHT...

Sky/weather.........Partly cloudy.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....49.
Max humidity........59 percent.
Wind (20 ft)........Downslope 2 to 5 mph.
Mixing height.......Near surface.
Transport winds.....West to southwest around 6 mph.

.SATURDAY...

Sky/weather.........Sunny with increasing high clouds late day.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....71.
Min humidity........33 percent.
Wind (20 ft)........Upslope to southwest 3 to 6 mph in
                    the afternoon.
Mixing height.......5000 ft AGL in the afternoon.
Transport winds.....West 5 to 10 mph.

.SATURDAY NIGHT...

Sky/weather.........Partly cloudy.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....54.
Max humidity........52 percent.
Wind (20 ft)........West winds around 8 mph in the evening
                    becoming downslope 1 to 4 mph.
Mixing height.......3000 ft AGL falling to 0 ft AGL.
Transport winds.....Northwest around 6 mph shifting to the east
                    around 5 mph overnight.

.SUNDAY...

Sky/weather.........Sunny becoming partly cloudy.  10% chance for afternoon
                    showers or thunderstorms.
CWR.................5 percent.
Chance of lightning.5-10 percent.
Max temperature.....75.
Min humidity........35 percent.
Wind (20 ft)........Southeast 5 to 10 mph.
Mixing height.......8500 ft AGL in the afternoon.
Transport winds.....Southeast 10 to 15 mph.



$$
Forecaster...SB
Requested by...Mary Giddings
Type of request...WILDFIRE
.TAG 2520902.2/OTX
.DELDT 08/29/25
.FormatterVersion 2.0.0
.EMAIL Mary.giddings@usda.gov