704
FNUS75 KBOI 220136
FWSBOI

Spot Forecast for Boise Basin Experimental forest Rx...Boise NF
National Weather Service Boise ID
736 PM MDT Tue May 21 2024

Forecast is based on ignition time of 1900 MDT on May 21.
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.

...RAIN BEGINNING OVERNIGHT TONIGHT...
...SHOWERS AND ISOLATED TO WIDELY SCATTERED THUNDERSTORMS WEDNESDAY...

.DISCUSSION...
A strong system will move in tonight, with steady rain beginning
overnight. Steady rain will become showers on Wednesday, with
thunderstorms possible after 9 AM MDT. Rainfall totals of 0.35 to
0.65 inches are expected. Breezy northwest winds will develop
Wednesday afternoon, with gusts to 15 mph on ridgelines. Colder
air will move in Wednesday night, allowing snow levels to drop to
around 4500 feet. However, precipitation will be tapering off and
any snow accumulation should be less than 1 inch. The system will
move east on Thursday with showers ending.

.REST OF TONIGHT...

Sky/weather.........Cloudy this evening, then rain beginning after
                    0300L. Chance of rain near 100 percent.
Min temperature.....37 to 42.
Max humidity........93 to 100 percent.
CWR /0.10 inch/.....60 percent.
LAL.................1.
Wind - 20 foot......South winds up to 3 mph.
Mixing height.......500 ft AGL.
Transport winds.....South around 5 mph.
Haines Index........2 very low.
Ventilation index...25 poor.

.WEDNESDAY...

Sky/weather.........Rain showers on and off through the day, and a
                    slight chance of thunderstorms. Chance of
                    precipitation near 100 percent.
Max temperature.....47 to 52.
Min humidity........46 to 51 percent.
CWR /0.10 inch/.....80 percent.
LAL.................2 in the morning, increasing to 3 in the
                    afternoon.
Wind - 20 foot......Southwest winds 2 to 4 mph in the morning,
                    becoming northwest 4 to 7 mph with gusts up to 12
                    mph in the afternoon.
Mixing height.......6000 ft AGL.
Transport winds.....West around 15 mph.
Haines Index........2 very low.
Ventilation index...900 excellent.

.WEDNESDAY NIGHT...

Sky/weather.........Mostly cloudy with a chance of rain and snow
                    showers. Chance of precipitation 40 percent. Snow
                    level 4500 feet. Snow accumulation less than
                    1 inch.
Min temperature.....27 to 32.
Max humidity........95 to 100 percent.
CWR /0.10 inch/.....20 percent.
LAL.................1.
Wind - 20 foot......Northwest winds 3 to 6 mph with gusts to around
                    10 mph in the evening, becoming less than 3 mph
                    overnight.
Mixing height.......700 ft AGL.
Transport winds.....Northwest around 5 mph.
Haines Index........3 very low.
Ventilation index...35 poor.

.THURSDAY...

Sky/weather.........Partly sunny. A slight chance of rain and snow
                    showers in the morning. Chance of precipitation
                    20 percent.
Max temperature.....56 to 61.
Min humidity........41 to 46 percent.
CWR /0.10 inch/.....10 percent.
LAL.................1.
Wind - 20 foot......Northwest winds 2 to 5 mph.
Mixing height.......5500 ft AGL.
Transport winds.....Northwest around 5 mph.
Haines Index........2 very low.
Ventilation index...275 fair.

$$
Forecaster...Tangen
Requested by...Steven Traverso
Type of request...PRESCRIBED
.TAG 2414871.0/BOI
.DELDT 05/21/24
.FormatterVersion 2.0.0
.EMAIL Robert.Dlouhy@usda.gov