Across Northern and Central CA:
A significant weather system is expected to impact northern and central California early this week, with ongoing showers already today. The system’s main effects will be felt from Sunday through Wednesday of next week. This system will not only bring significant precipitation but also poses the risk of strong to severe thunderstorms, scattered and embedded, especially on Monday. Additionally, significant snowfall is expected in the mountains, with several feet of snow anticipated. Check overall forecast’s for further specific details on the forecast.
Overall Forecast:
In the atmosphere over northern and central California, an approaching powerful closed low-pressure system is expected to impact the region, bringing very significant moisture and various weather types. At the same time, at the surface, a deepening low-pressure system with a cold front is approaching from the west. Ahead of that front, warm air advection will combine with instability and elevated shear. Additionally, with the low-level jet stream over the region creating spin, scattered thunderstorms are expected on Monday. Some areas may experience severe storms capable of producing isolated tornadoes, waterspouts, and damaging winds. Additionally, significant precipitation is expected to fall for multiple days, with flooding anticipated in low-lying areas, streets, and other flood-prone regions. Flooding will also be likely elsewhere given the rate of rainfall. Strong winds will also be another risk with wind gusts expected to be around 30-45mph locally gusting over 50mph on Sunday evening through Sunday night and into Monday morning. Above 6,000 feet, 1-2 feet of snow is expected, with 2-5 feet of snow above 7,000 feet, especially from Sunday evening through Wednesday morning before tapering off as the system exits. For more updates on the hourly forecast and further details on the timing, check below.