686
FNUS75 KBOI 241246
FWSBOI

Spot Forecast for Knife Fire...USFS
National Weather Service Boise ID
646 AM MDT Mon Aug 24 2026

Forecast is based on forecast start time of 0800 MDT on August 24.
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.

...ISOLATED SHOWERS TONIGHT...
...SOUTHWEST FLOW ALOFT WILL BRING WARMER TEMPERATURES...

.DISCUSSION...
An upper level ridge will expand over the area today and bring a
shortwave over the area this afternoon and evening. Isolated showers
expected this evening with gusty outflow winds possible from the
showers. Southwest winds expected during the afternoon, with northeast
drainage winds overnights outside of the gusty outflow winds from
showers. Isolated thunderstorms possible on Tuesday afternoon, but will
generally be east of the fire.

.REST OF TODAY...

Sky/weather.........Mostly sunny.
Max temperature.....68 to 73.
Min humidity........21 to 26 percent.
CWR.................0 percent.
Wind - 20 foot......Southwest around 8 mph. Gusts up to 16 mph in
                    the afternoon.
Mixing height.......8500 ft AGL.
Transport winds.....Southwest around 20 mph.
Ventilation Index...1700 excellent.

.TONIGHT...

Sky/weather.........Mostly cloudy. Isolated showers overnight.
Min temperature.....50 to 55.
Max humidity........46 to 51 percent.
CWR.................0 percent.
Wind - 20 foot......Southwest 3 to 7 mph. Gusts up to 16 mph
                    overnight. Showers may produce gusty and erratic
                    outflow winds. Becoming NE 3 to 5 mph after
                    midnight after showers move through.
Mixing height.......100 ft AGL.
Transport winds.....Southeast around 10 mph.
Ventilation Index...10 poor.

.TUESDAY...

Sky/weather.........Mostly sunny.
Max temperature.....69 to 74.
Min humidity........27 to 32 percent.
CWR.................0 percent.
Wind - 20 foot......Southwest 6 to 10 mph. Gusts up to 16 mph in
                    the afternoon.
Mixing height.......11000 ft AGL.
Transport winds.....Southwest around 15 mph.
Ventilation Index...1650 excellent.

$$
Forecaster...Anderson
Requested by...Knife Fire IC
Type of request...WILDFIRE
.TAG 2620352.0/BOI
.DELDT 08/24/26
.FormatterVersion 2.0.0
.EMAIL steven.becker2@usda.gov