695
FNUS75 KBOI 200820
FWSBOI

Spot Forecast for Fox...FS
National Weather Service Boise ID
220 AM MDT Thu Aug 20 2026

Forecast is based on forecast start time of 0800 MDT on August 20.
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 THROUGH FRIDAY...
...SLIGHT CHANCE FOR THUNDERSTORMS FRIDAY NIGHT AND SATURDAY...


.DISCUSSION...
High pressure will keep hot and dry weather in place through
Friday. Well above normal temperatures will accompany afternoon
humidity around 10% followed by poor overnight recovery. Winds
will cycle between the south-southwest during the day and north-
northwest overnight. Friday night will bring a 20% chance of high-
based showers and thunderstorms that could produce gusty winds
and little rain. Temperatures will run 5 to 10 degrees cooler on
Saturday with stronger southwest winds and a continued chance of
showers and thunderstorms. A cold front passage Saturday evening
will bring gusty northwest winds.

.TODAY...

Sky/weather.........Partly sunny.
Max temperature.....90 to 97.
Min humidity........7 to 14 percent.
CWR.................0 percent.
Wind - 20 foot......Northwest 3 to 7 mph in the morning shifting
                    to southwest 4 to 8 mph in the afternoon.
Mixing height.......7500 ft AGL.
Transport winds.....Southwest around 10 mph.
Ventilation Index...750 excellent.

.TONIGHT...

Sky/weather.........Cloudy.
Min temperature.....65 to 72.
Max humidity........23 to 30 percent.
CWR.................0 percent.
Wind - 20 foot......Southwest 4 to 8 mph in the evening shifting
                    to the northwest 3 to 7 mph with gusts up to
                    14 mph overnight.
Mixing height.......100 ft AGL.
Transport winds.....North around 5 mph.
Ventilation Index...5 poor.

.FRIDAY...

Sky/weather.........Mostly cloudy.
Max temperature.....93 to 100.
Min humidity........8 to 15 percent.
CWR.................0 percent.
Wind - 20 foot......North 3 to 7 mph in the morning shifting
                    to the south 4 to 8 mph in the afternoon.
Mixing height.......10000 ft AGL.
Transport winds.....South around 10 mph.
Ventilation Index...1000 excellent.

$$
Forecaster...Groenert
Requested by...Cody Collins
Type of request...WILDFIRE
.TAG 2619441.9/BOI
.DELDT 08/20/26
.FormatterVersion 2.0.0
.EMAIL danielsmith@blm.gov,cscollins@blm.gov