####018004736#### 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