A low pressure system will sweep through S CA bringing rain, areas of gusty winds and mountain snow along with a chance for thunderstorms over the interior. Rain starts off light Sat morning, becoming showery in the afternoon. Heavier showers / thunderstorms will be capable of producing brief, heavy downpours, small hail, gusty winds and lightning. They could also produce snow or graupel down to 4000-3500 ft elevations.