773
FNUS75 KBOI 182025
FWSBOI

Spot Forecast for Box...BLM
National Weather Service Boise ID
225 PM MDT Mon Aug 18 2025

Forecast is based on forecast start time of 0600 MDT on August 19.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office at (208)334-9060, if you have questions
or concerns with this forecast.

...HOT AND DRY WITH BREEZY AFTERNOON WINDS...

.DISCUSSION...
South to southwesterly winds may increase suddenly around noon on
Tuesday, reaching peak winds around 15 to 20 mph through until
around 2000 before easing. Nocturnal downslope winds are likely in
the local valleys, with wind directions most likely tending
westerly overnight. Winds are expected to shift north to
northwesterly around 1400 Wednesday and ease slightly.
Temperatures peaking on Tuesday then moderating into the mid week,
with poor overnight RH recoveries.

.TUESDAY...

Sky/weather.........Sunny.
Max temperature.....92 to 97.
Min humidity........11 to 16 percent.
CWR.................0 percent.
Wind - 20 foot......South to southwest 8 to 15 mph. Gusts up to 25 mph in the
                    afternoon.
Mixing height.......13500 ft AGL.
Transport winds.....South around 20 mph.
Ventilation Index...2700 excellent.

.TUESDAY NIGHT...

Sky/weather.........Mostly clear.
Min temperature.....60 to 65.
Max humidity........34 to 39 percent.
CWR.................0 percent.
Wind - 20 foot......West 8 to 13 mph. Gusts up to 23 mph in the
                    earlier evening.
Mixing height.......200 ft AGL.
Transport winds.....West around 5 mph.
Ventilation Index...10 poor.

.WEDNESDAY...

Sky/weather.........Sunny.
Max temperature.....88 to 93.
Min humidity........16 to 21 percent.
CWR.................0 percent.
Wind - 20 foot......Northwest 4 to 8 mph. Gusts up to 20 mph in the
                    afternoon.
Mixing height.......10000 ft AGL.
Transport winds.....West around 10 mph.
Ventilation Index...1000 excellent.

$$
Forecaster...Zhou
Requested by...Idaho Team 1
Type of request...WILDFIRE
.TAG 2520155.0/BOI
.DELDT 08/19/25
.FormatterVersion 2.0.0
.EMAIL 2025.box.plans@firenet.gov