900
FNUS75 KBOI 120716
FWSBOI

Spot Forecast for Lake Fire...USFS
National Weather Service Boise ID
116 AM MDT Wed Aug 12 2026

Forecast is based on forecast start time of 0600 MDT on August 12.
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.

...INCREASING SHOWER AND THUNDERSTORM CHANCES THURSDAY...

.DISCUSSION...
Cooler and breezy today. Monsoonal moisture will bring increasing
chances of showers and thunderstorms Thursday. Chances of showers
increase to 40% late thursday afternoon/early evening with a 20% chance
of thunderstorms. Storms will be capable of lightning and outflows
to around 30 mph. Precipitation chances will continue to increase
overnight Thursday into Friday, with a slight chance of
thunderstorms Thursday night.

.TODAY...

Sky/weather.........Sunny.
Max temperature.....70 to 75.
Min humidity........23 to 28 percent.
CWR.................0 percent.
Wind - 20 foot......Upslope around 4 mph in the morning. Becoming
                    west southwest 7 to 12 mph with gusts to around
                    20 mph in the afternoon.
Mixing height.......9000 ft AGL.
Transport winds.....Southwest around 15 mph.
Ventilation Index...1350 excellent.

.TONIGHT...

Sky/weather.........Partly cloudy.
Min temperature.....48 to 53.
Max humidity........63 to 68 percent.
CWR.................0 percent.
Wind - 20 foot......Northwest 3 to 9 mph with gusts to around 16 mph
                    in the evening. Becoming downslope around 3 mph
                    overnight.
Mixing height.......200 ft AGL.
Transport winds.....Northeast around 5 mph.
Ventilation Index...10 poor.

.THURSDAY...

Sky/weather.........Partly sunny with a chance of showers and
                    of thunderstorms. Some thunderstorms may
                    produce gusty winds in the afternoon. Chance of
                    precipitation 30 percent.
Max temperature.....65 to 70.
Min humidity........39 to 44 percent.
CWR.................10 percent.
Wind - 20 foot......Upslope around 4 mph in the morning. Becoming
                    northwest 5 to 10 mph with gusts up to 16 mph in
                    afternoon. Gusty and erratic winds expected near
                    thunderstorms in the afternoon.
Mixing height.......7000 ft AGL.
Transport winds.....West around 10 mph.
Ventilation Index...700 excellent.

$$
Forecaster...Francis
Requested by...IC
Type of request...WILDFIRE
.TAG 2619115.6/BOI
.DELDT 08/12/26
.FormatterVersion 2.0.0
.EMAIL idpac@firenet.gov