963
FNUS75 KBOI 101441
FWSBOI

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

Forecast is based on ignition time of 0800 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 CHANCE OF SHOWERS SATURDAY...

.DISCUSSION...
A low pressure system off the Pacific Northwest coast will bring
gusty southerly winds to burn site today. Ridgetops will see gusty
southwest winds, with winds channeling south to north through
mountain valleys. Showers will develop late this afternoon ahead of
a cold front, and a thunderstorm is possible near the burn site. The
best chance for showers will be between 5PM and 11PM today. 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, but accumulating
snow will be above 8500 feet. Accumulation of 1 to 3 is expected
Saturday night into Sunday with snow levels dropping to around
5000 feet.

.REST OF TODAY...

Sky/weather.........Mostly sunny in the morning then partly cloudy
                    with a 20 percent chance of rain showers and
                    a slight chance of thunderstorms. Gusty and
                    erratic winds are possible from showers and
                    thunderstorms.
Max temperature.....64 to 69.
Min humidity........34 to 39 percent.
CWR.................10 percent.
Wind - 20 foot......South 9 to 15 mph with gusts to around 24 mph
                    in the afternoon.
Mixing height.......8000 ft AGL.
Transport winds.....South around 30 mph.
Ventilation Index...2400 excellent.

.TONIGHT...

Sky/weather.........Mostly cloudy. Rain showers likely and a slight
                    chance of thunderstorms in the evening, then
                    rain and snow showers likely overnight. Gusty and
                    erratic winds are possible from showers and
                    thunderstorms in the evening. Chance of
                    precipitation 70 percent. No snow accumulation.
Min temperature.....32 to 37.
Max humidity........89 to 98 percent.
CWR.................40 percent.
Wind - 20 foot......Southwest 10 to 16 mph. Gusts up to 24 mph in
                    the evening.
Mixing height.......600 ft AGL.
Transport winds.....Southwest around 10 mph.
Ventilation Index...60 poor.

.SATURDAY...

Sky/weather.........A chance of rain and snow showers in the
                    morning, then rain and snow showers, and a
                    slight chance of thunderstorms in the
                    afternoon. Chance of precipitation 80 percent.
                    Snow level 7500 feet. No snow accumulation.
Max temperature.....44 to 52.
Min humidity........51 to 56 percent.
CWR.................40 percent.
Wind - 20 foot......Southwest 3 to 9 mph. Gusts up to 14 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 2523297.0/BOI
.DELDT 10/10/25
.FormatterVersion 2.0.0
.EMAIL laurel.ingram@usda.gov