219
FNUS75 KBOI 112246
FWSBOI

Spot Forecast for MM115 - HWY 20...USWFS GB UNIT 1
National Weather Service Boise ID
446 PM MDT Tue Aug 11 2026

Forecast is based on forecast start time of 1700 MDT on August 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.

...FIRE WEATHER WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH
LATE THURSDAY NIGHT...

.DISCUSSION...
Warm, dry, and smoky conditions will continue through Wednesday.
Mid- and high-level clouds will increase from the south tonight,
limiting overnight cooling and keeping humidity recovery poor
(only around 35%).  No rain from these clouds.  Clouds will
decrease Wednesday morning, becoming mostly sunny Wednesday
afternoon.  A surge of monsoon moisture from the south will
arrive Thursday, starting a cooler and wetter trend with a
20-30% chance of thunderstorms beginning Thursday afternoon.

Sky/weather.........Sunny.
Max temperature.....88 to 93.
Min humidity........9 to 14 percent.
CWR.................0 percent.
Wind - 20 foot......West around 7 mph with gusts to around 14 mph.
Mixing height.......9000 ft AGL.
Transport winds.....West around 15 mph.
Ventilation Index...1350 excellent.

.TONIGHT...

Sky/weather.........Becoming mostly cloudy.
Min temperature.....56 to 61.
Max humidity........29 to 34 percent.
CWR.................0 percent.
Wind - 20 foot......West 3 to 7 mph with gusts to around 14 mph in
                    the evening shifting to the northeast around 3
                    mph overnight.
Mixing height.......200 ft AGL.
Transport winds.....East around 5 mph.
Ventilation Index...10 poor.

.WEDNESDAY...

Sky/weather.........Decreasing clouds in the morning. Becoming mostly sunny.
Max temperature.....84 to 89.
Min humidity........13 to 18 percent.
CWR.................0 percent.
Wind - 20 foot......Southwest 3 to 8 mph. Gusts up to 16 mph in the
                    afternoon.
Mixing height.......10000 ft AGL.
Transport winds.....West around 15 mph.
Ventilation Index...1500 excellent.

$$
Forecaster...Colin
Requested by...Ian Turner
Type of request...WILDFIRE
.TAG 2619463.0/BOI
.DELDT 08/11/26
.FormatterVersion 2.0.0
.EMAIL iturner@blm.gov