357
FNUS75 KBOI 161047 CCA
FWSBOI

Spot Forecast for Railroad Rx...CORRECTED
National Weather Service Boise ID
447 AM MDT Sat May 16 2026

Forecast is based on ignition time of 0600 MDT on May 16.
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.

...COOL AND WET WITH VALLEY SNOW BY SUNDAY AM...
...ISOLATED PM THUNDERSTORMS...

.DISCUSSION...
A cold front will bring much cooler temperatures, breezy ridgetop
winds, and scattered showers/stray thunderstorms throughout the
day today. Sheltered locations in the valley will continue to
see light east winds. Cold temperatures overnight will lower snow
levels to 4000-5000 feet MSL with up to an inch of snow down to
4000 feet by Sunday morning. Afternoon stray thunderstorms (10%
chance) could bring gusty outflow winds up to 40, lightning, and
brief heavy rain.

.TODAY...

Sky/weather.........Mostly cloudy. A chance of showers in the
                    morning, then slight chance of thunderstorms in
                    the afternoon. Chance of precipitation 60 percent.
Max temperature.....44 to 48.
Min humidity........47 to 55 percent.
CWR.................40 percent.
Wind - 20 foot......East 3 to 6 mph with gusts to around 12 mph. Gusty
 and erratic winds expected near thunderstorms
in the afternoon.
Mixing height.......6000 ft AGL.
Transport winds.....West around 15 mph.
Ventilation Index...900 excellent.

.TONIGHT...

Sky/weather.........Mostly cloudy with a 40 percent chance of snow
                    showers. Snow accumulation up to 2 inches.
Min temperature.....29 to 34.
Max humidity........89 to 94 percent.
CWR.................20 percent.
Wind - 20 foot......Northwest 4 to 8 mph. Gusts up to 12 mph in
                    the evening.
Mixing height.......500 ft AGL.
Transport winds.....Northwest around 10 mph.
Ventilation Index...50 poor.

.SUNDAY...

Sky/weather.........Partly cloudy. A chance of showers and a slight chance
of thunderstorms in the afternoon. Chance of
precipitation 30 percent.
Max temperature.....44 to 49.
Min humidity........50 to 58 percent.
CWR.................10 percent.
Wind - 20 foot......Northeast 5 to 11 mph. Gusts up to 20 mph in the
                    afternoon. Gusty and erratic winds expected
                    near thunderstorms in the afternoon.
Mixing height.......4500 ft AGL.
Transport winds.....North around 15 mph.
Ventilation Index...675 good.

$$
Forecaster...Adams
Requested by...Liz Winters
Type of request...PRESCRIBED
.TAG 2613781.0/BOI
.DELDT 05/16/26
.FormatterVersion 2.0.0
.EMAIL elizabeth.winters@usda.gov