A low pressure system heading straight towards Central California will bring heavy rain, snow, and the potential for thunderstorms to the north state today. Some areas may be susceptible to flooding due to the heavy precipitation. The heavy rain could also cause debris flows, and make roads slick. Snow levels started out around 5000 feet this morning, but may drop as low as 4000 feet in the Northern Sierra, which could complicate travel conditions in the higher elevations. Thunderstorms look very possible for the valley this afternoon, and could be accompanied by small hail, and gusty winds. Lighter showers will linger into the forecast on Saturday, and could even extend into Sunday for the Northern Sierra. The next wet system could arrive as early as Monday night, but will not bring as widespread, and substantial precipitation as what the current system is continuing to deliver. Please take extra caution on the roads today, and this weekend, as conditions look to be dicey for travelers.