189
FNUS75 KBOI 112317
FWSBOI

Spot Forecast for Buckhorn...South Idaho
National Weather Service Boise ID
517 PM MDT Fri Sep 11 2026

Forecast is based on forecast start time of 1800 MDT on September 11.
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.

...INCREASED WINDS SATURDAY FOLLOWED BY FRONTAL PASSAGE SUNDAY...
...MUCH COOLER WITH HIGHER HUMIDITY ON SUNDAY...

.DISCUSSION...
Warm and dry conditions with low RHs continue through Saturday.
Winds will steadily increasing from the southeast/southwest Saturday
afternoon through evening with ridge gusts around 25-30 MPH. A cold
frontal passage late Sunday morning will bring winds to westerly and
remain gusty through the early evening. Temperatures will drop about
20 degrees from Saturdays highs, increasing min RHs.

.TONIGHT...

Sky/weather.........Mostly clear.
Min temperature.....43 to 50.
Max humidity........42 to 48 percent.
CWR.................0 percent.
Wind - 20 foot......Shifting to the east/southeast 3 to 6 mph after
                    sunset.
Mixing height.......200 ft AGL.
Transport winds.....East around 10 mph.
Ventilation Index...20 poor.

.SATURDAY...

Sky/weather.........Mostly sunny in the morning then becoming
                    mostly cloudy in the afternoon.
Max temperature.....66 to 71.
Min humidity........18 to 25 percent.
CWR.................0 percent.
Wind - 20 foot......Southeasterly 4 to 8 mph in the morning. Shifting
                    to southwest 8 to 18 mph, with gusts to 25-30 mph
                    for exposed areas and ridge tops in the afternoon.
Mixing height.......7500 ft AGL.
Transport winds.....Southwest around 15 mph.
Ventilation Index...1125 excellent.

.SATURDAY NIGHT...

Sky/weather.........Cloudy.
Min temperature.....42 to 48.
Max humidity........64 to 71 percent.
CWR.................0 percent.
Wind - 20 foot......Southeast 11 to 18 mph with gusts to around 25-30
                    mph for exposed areas and ridge tops overnight.
Mixing height.......400 ft AGL.
Transport winds.....Southeast around 15 mph.
Ventilation Index...60 poor.

.SUNDAY...

Sky/weather.........Partly sunny in the morning, then clearing.
Max temperature.....48 to 54. Much cooler.
Min humidity........30 to 37 percent. Higher.
CWR.................0 percent.
Wind - 20 foot......Transitioning to southwest 4 to 10 mph in the morning,
                    Then, west 10 to 19 mph with gusts to around 25-35 mph
                    for exposed areas and ridges in the afternoon.
Mixing height.......5500 ft AGL.
Transport winds.....West around 15 mph.
Ventilation Index...825 excellent.

$$
Forecaster...Henry
Requested by...T. Mounce
Type of request...WILDFIRE
.TAG 2621688.0/BOI
.DELDT 09/11/26
.FormatterVersion 2.0.0
.EMAIL idscc@firenet.gov