230
FNUS75 KBOI 180853
FWSBOI

Spot Forecast for Fox...FS
National Weather Service Boise ID
253 AM MDT Tue Aug 18 2026

Forecast is based on forecast start time of 0800 MDT on August 18.
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.

...BREEZY WINDS TODAY...
...DRY WITH WARMING TEMPERATURES THROUGH FRIDAY...

.DISCUSSION...
Strengthening high pressure will keep dry conditions over the
fire through the remainder of the week. Temperatures will climb
above normal, approaching 100 degrees across lower elevations of
the fire Thursday and Friday. Afternoon humidity will drop below
15 percent across the burn area starting on Wednesday. Breezy
winds today will weaken heading into Wednesday.

.TODAY...

Sky/weather.........Mostly sunny.
Max temperature.....84 to 90.
Min humidity........13 to 20 percent.
CWR.................0 percent.
Wind - 20 foot......Northwest 3 to 6 mph in the morning, becoming
                    northwest 6 to 10 mph with gusts up to 16 mph
                    in the afternoon.
Mixing height.......10500 ft AGL.
Transport winds.....West around 10 mph.
Ventilation Index...1050 excellent.

.TONIGHT...

Sky/weather.........Mostly clear.
Min temperature.....59 to 64.
Max humidity........34 to 41 percent.
CWR.................0 percent.
Wind - 20 foot......Northwest 6 to 12 mph with gusts to around 18
                    mph in the evening, becoming northwest 3 to 6 mph
                    after midnight.
Mixing height.......100 ft AGL.
Transport winds.....Northwest around 10 mph.
Ventilation Index...10 poor.

.WEDNESDAY...

Sky/weather.........Mostly sunny.
Max temperature.....86 to 92.
Min humidity........10 to 16 percent.
CWR.................0 percent.
Wind - 20 foot......North 3 to 7 mph.
Mixing height.......9000 ft AGL.
Transport winds.....Southwest around 5 mph.
Ventilation Index...450 fair.

$$
Forecaster...Groenert
Requested by...Cody Collins
Type of request...WILDFIRE
.TAG 2619441.7/BOI
.DELDT 08/18/26
.FormatterVersion 2.0.0
.EMAIL danielsmith@blm.gov,cscollins@blm.gov