853
FNUS76 KSTO 032119
FWSSTO

Spot Forecast for Ishi Crew Preparedness Exercise...CAL FIRE
National Weather Service Sacramento CA
219 PM PDT Fri May 3 2024

Forecast is based on forecast start time of 0000 PDT on May 04.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

A potent, late season storm system is set to impact northern California
this weekend. Widespread wetting rain, isolated thunderstorms, moderate
to heavy mountain snow, and gusty south-southwesterly winds are all
expected on Saturday. Heaviest precipitation is anticipated Saturday
morning and afternoon near the forecast area. This storm system is
expected to be rather progressive, with precipitation chances tapering
off through the morning, to near zero in the afternoon.

.REST OF TONIGHT...

Sky/weather.........Increasing clouds. Rain showers overnight.
Chance of pcpn......80 percent.
Min temperature.....37-42.
Max humidity........94-99 percent.
Surface winds (mph).Windy. South winds 10 to 15 mph with gusts to
                    25 mph at forecast start time, increasing to 25 to
                    30 mph with gusts up to 45 mph.
Wind (20 ft)........
 Valley/lwr slopes..Windy. South winds 20 to 30 mph with gusts up to
                    45 mph.
 RIDGE/UPPER SLOPE..
Mixing height.......Near 500 ft AGL at forecast start time, rising
                    to near 1000 ft AGL overnight.
Transport winds.....South around 24 mph.
Pcpn amount.........Up to 0.30 inches.
Snowfall amount.....0.0 inches.
Snow level..........7000-8000 feet.

.SATURDAY...

Sky/weather.........Cloudy. Rain showers in the morning, then rain
                    showers likely and slight chance of
                    thunderstorms in the afternoon.
Chance of pcpn......100 percent.
Max temperature.....46-51.
Min humidity........74-79 percent.
Surface winds (mph).Windy. South winds 25 to 30 mph with gusts up to
                    45 mph in the morning, becoming southwest 10 to 15
                    mph with gusts to 25 mph in the afternoon.
Wind (20 ft)........
 Valley/lwr slopes..Windy. South winds 25 to 30 mph with gusts to
                    around 45 mph becoming southwest 10 to 15 mph in
                    the afternoon. Gusty and erratic winds expected
                    near thunderstorms in the afternoon.
 RIDGE/UPPER SLOPE..
Mixing height.......Near 1000 ft AGL in the morning, rising to near
                    3500 ft AGL in the afternoon.
Transport winds.....Southwest around 17 mph.
Pcpn amount.........Up to 1.75 inches.
Snowfall amount.....0.0 inches.
Snow level..........6000-7000 feet in the morning, lowering to near
                    4000 feet in the afternoon.

.SATURDAY NIGHT...

Sky/weather.........Mostly cloudy. Rain showers likely and slight
                    chance of thunderstorms in the evening, then
                    slight chance of rain showers and snow showers
                    overnight.
Chance of pcpn......70 percent.
Min temperature.....30-35.
Max humidity........88-93 percent.
Surface winds (mph).South-southwest winds 5 to 10 mph.
Wind (20 ft)........
 Valley/lwr slopes..South-southwest winds 5 to 10 mph. Gusty and
                    erratic winds expected near thunderstorms in
                    the evening.
 RIDGE/UPPER SLOPE..
Mixing height.......Near 2000 ft AGL in the early evening, falling
                    to near 600 ft AGL overnight.
Transport winds.....Southwest around 7 mph.
Pcpn amount.........Up to 0.20 inches.
Snowfall amount.....Up to 0.5 inches.
Snow level..........Near 4000 feet in the early evening, lowering to
                    2500-3000 feet overnight.

.SUNDAY...

Sky/weather.........Mostly sunny.
Chance of pcpn......10 percent.
Max temperature.....47-52.
Min humidity........49-54 percent.
Surface winds (mph).Southwest winds up to 8 mph.
Wind (20 ft)........
 Valley/lwr slopes..Southwest winds up to 8 mph.
 RIDGE/UPPER SLOPE..
Mixing height.......Near 600 ft AGL in the morning, rising to near
                    4900 ft AGL in the afternoon.
Transport winds.....West around 7 mph.
Pcpn amount.........0.00 inches.
Snowfall amount.....0.0 inches.
Snow level..........2500-3000 feet in the morning, rising to near
                    4500 feet in the afternoon.

$$
Forecaster...NR
Requested by...Tony Welch
Type of request...OTHER
.TAG 2413109.0/STO
.DELDT 05/03/24
.FormatterVersion 2.0.0
.EMAIL tony.welch@fire.ca.gov