148
FNUS75 KBOI 031224
FWSBOI

Spot Forecast for Lost Horse...USFS
National Weather Service Boise ID
524 AM MST Tue Nov 3 2026

Forecast is based on ignition time of 0900 MST on November 03.
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.

...DRY WITH POOR VENTILATION THIS WEEK...

.DISCUSSION...
High pressure will remain overhead today while a low pressure
system moves east into northern Nevada tonight. Winds will be out
of the east to southeast this morning with a slight breeze on
ridgelines, then decrease and switch to the west to southwest by
mid afternoon. The ridge will also suppress vertical mixing,
leading to poor ventilation. Clouds will move overhead through the
day ahead of the low pressure system, but showers should remain
to the south. High pressure will reestablish on Wednesday with
overall similar conditions to today. Cool temperatures will keep
afternoon humidities somewhat elevated with good to moderate
overnight recoveries. A weak system on Thursday will bring a 30%
chance of a rain/snow mix.

.TODAY...

Sky/weather.........Mostly cloudy.
Max temperature.....43 to 48.
Min humidity........40 to 45 percent.
CWR.................0 percent.
Wind - 20 foot......East to southeast 2 to 5 mph in the morning,
                    becoming west to southwest 2 to 4 mph in the
                    afternoon.
Mixing height.......2000 ft AGL.
Transport winds.....Southwest around 5 mph.
Ventilation Index...100 poor.

.TONIGHT...

Sky/weather.........Cloudy.
Min temperature.....29 to 34.
Max humidity........65 to 75 percent.
CWR.................0 percent.
Wind - 20 foot......North to northeast 2 to 5 mph.
Mixing height.......100 ft AGL.
Transport winds.....Northeast around 5 mph.
Ventilation Index...5 poor.

.WEDNESDAY...

Sky/weather.........Mostly cloudy in the morning, then clearing.
Max temperature.....43 to 48.
Min humidity........38 to 43 percent.
CWR.................0 percent.
Wind - 20 foot......North to northeast 2 to 5 mph in the morning,
                    becoming west to southwest 2 to 4 mph in the
                    afternoon.
Mixing height.......3000 ft AGL.
Transport winds.....Northwest around 5 mph.
Ventilation Index...150 poor.

$$
Forecaster...Tangen
Requested by...Wynkoop
Type of request...PRESCRIBED
.TAG 2624758.2/BOI
.DELDT 11/03/26
.FormatterVersion 2.0.0
.EMAIL matthew.haupt@usda.gov,lucarelli.julian@gmail.com,michael.wynkoop@usda.gov,steven.hlawatschek@usda.gov