566
FNUS75 KBOI 101952
FWSBOI

Spot Forecast for Big Creek Piles...USFS
National Weather Service Boise ID
152 PM MDT Fri Oct 10 2025

Forecast is based on ignition time of 1400 MDT on October 10.
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.

...CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS THIS AFTERNOON...

...FRONTAL PASSAGE TONIGHT WITH CONTINUED CHANCE OF SHOWERS SATURDAY...

.DISCUSSION...
A low pressure system off the Pacific Northwest coast will keep
gusty southerly winds at the burn site through this evening.
Ridgetops will see gusty southwest winds, with winds channeling south
to north through mountain valleys. Showers and possible thunderstorms
will develop late this afternoon ahead of a cold front. The best
chance for showers will be between 5PM and 11PM today with the
thunderstorm threat ending by 8PM. Not expecting a wind shift with
the overnight frontal passage though showers and thunderstorms could
bring gusty and erratic winds through the evening. Snow levels will
drop to 7500 feet by Saturday afternoon, but accumulating snow will
remain above 8500 feet. Colder air arrives Saturday night, dropping
snow levels to around 5000 feet MSL. Accumulation of up to 3 is
expected Saturday night.

.REST OF TODAY...

Sky/weather.........Partly sunny with a 20 percent chance of
                    showers and thunderstorms. Gusty and erratic
                    winds are possible from showers and
                    thunderstorms.
Max temperature.....64 to 69.
Min humidity........37 to 42 percent.
CWR.................10 percent.
Wind - 20 foot......South 9 to 15 mph with gusts to around 24 mph.
Mixing height.......7000 ft AGL.
Transport winds.....South around 30 mph.
Ventilation Index...2100 excellent.

.TONIGHT...

Sky/weather.........Mostly cloudy. Rain showers likely and a
                    slight chance of thunderstorms in the evening,
                    then a chance of rain and snow showers
                    overnight. Chance of precipitation 60 percent.
                    Snow level dropping to 8000 feet MSL. No snow
                    accumulation.
Min temperature.....32 to 37.
Max humidity........86 to 91 percent.
CWR.................30 percent.
Wind - 20 foot......Southwest 5 to 11 mph with gusts to around 16
                    mph. Gusty and erratic winds expected near
                    thunderstorms.
Mixing height.......700 ft AGL.
Transport winds.....Southwest around 10 mph.
Ventilation Index...70 poor.

.SATURDAY...

Sky/weather.........Mostly cloudy. A chance of rain and snow
                    showers in the morning, then rain and snow
                    showers likely in the afternoon. Chance of
                    precipitation 70 percent. Snow level 7500 feet
                    MSL. Little or no snow accumulation.
Max temperature.....43 to 51.
Min humidity........58 to 63 percent.
CWR.................40 percent.
Wind - 20 foot......Southwest 5 to 10 mph with gusts to around 16
                    mph in the afternoon.
Mixing height.......5000 ft AGL.
Transport winds.....Southwest around 15 mph.
Ventilation Index...750 excellent.

$$
Forecaster...Groenert
Requested by...Laurel Ingram
Type of request...PRESCRIBED
.TAG 2523297.1/BOI
.DELDT 10/10/25
.FormatterVersion 2.0.0
.EMAIL laurel.ingram@usda.gov