A low pressure system from the north will bring colder temperatures and rain chances to southern CA as early as Saturday afternoon, lasting into Monday. Expecting the highest rain totals favoring Los Angeles County and the eastern San Gabriel mountains. There is also a risk of thunderstorms (10-20% chance), capable of producing small hail and isolated brief heavy downpours with rainfall rates up to 0.75 in/hr. There is a low chance for more serious impacts (debris flows for recent burn scars) if heavier showers/storms pass over these vulnerable areas.