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000
FNUS75 KBOI 250336
FWSBOI

Spot Forecast for Four Mile RX...USFS
National Weather Service Boise ID
936 PM MDT Wed Apr 24 2024

Forecast is based on ignition time of 0800 MDT on April 25.
If conditions become unrepresentative...contact the National Weather
Service.

...COOLER AND WETTER THURSDAY INTO FRIDAY...

.DISCUSSION...
A weak, dry cold front tonight will keep winds westerly on Thursday. Growing
cumulus clouds will develop into isolated showers around the spot Thursday afternoon.
Then, numerous rain/snow showers will arrive from the west around 0100 MDT Friday
morning with the next cold front. Higher ridges should see light snow accumulations with
snow levels lowering to 5500-6500 ft MSL Friday morning. Shower coverage will decrease
after 0600-0800 MDT, but isolated showers will continue around the spot through the
afternoon. Best chance for a lightning strike between 1500-1900 MDT Friday. Erratic
gusts up to 20-30 mph possible in exposed areas near storms.


.THURSDAY...

Sky/weather.........Partly sunny. A slight chance of rain and snow
                    showers in the afternoon. Chance of
                    precipitation 20 percent.
Max temperature.....44 to 54.
Min humidity........35 to 45 percent.
CWR /0.10 inch/.....10 percent.
LAL.................1.
Wind - eye level....West up 4 to 7 mph with gusts to around 12 mph on
                    ridges.
Mixing height.......5500 ft AGL.
Transport winds.....West around 10 mph.
Haines Index........2 very low.
Ventilation index...550 good.

.THURSDAY NIGHT...

Sky/weather.........A chance of rain and snow showers in the
                    evening, then rain and snow after
                    midnight. Chance of precipitation 90 percent.
                    Snow accumulation up to 1-3 inches total.
                    Snow level could dip as low as 5500 ft MSL overnight.
Min temperature.....31 to 37.
Max humidity........90 to 100 percent.
CWR /0.10 inch/.....50 percent.
LAL.................1.
Wind - eye level....Southwest 3 to 6 mph Thursday night, then
                    northeast 2 to 4 mph Friday morning.
Mixing height.......500 ft AGL.
Transport winds.....Southwest around 5 mph.
Haines Index........3 very low.
Ventilation index...25 poor.

.FRIDAY...

Sky/weather.........Rain and snow showers, mainly in the morning.
                    A slight chance of thunderstorms in the afternoon.
                    Chance of precipitation 90 percent. Snow accumulation
                    to 1-3 inches total.
Max temperature.....38 to 48.
Min humidity........55 to 65 percent.
CWR /0.10 inch/.....60 percent.
LAL.................1 in the morning, increasing to 2 in the
                    afternoon.
Wind - eye level....Northeast or variable 2 to 4 mph, becoming
                    northwest-west 3 to 6 mph in the afternoon. Ridge
                    top gusts to 11 mph.
Mixing height.......4000 ft AGL.
Transport winds.....Northwest around 5 mph.
Haines Index........2 very low.
Ventilation index...200 fair.

$$
Forecaster...Henry
Requested by...Laurel Ingram
Type of request...PRESCRIBED
.TAG 2411765.3/BOI
.DELDT 04/25/24
.FormatterVersion 2.0.0
.EMAIL zachary.freundlich@usda.gov,Laurel.ingram@usda.gov