cold front

The cold front will have moved away from Los Angeles, but the cold core of the low-pressure system will still be around.

The thunderstorms will remain a slight risk because of a cold front that ushered in unstable air Monday.

Snow levels in local mountains will drop with the cold front to around 4,500 feet by Tuesday, according to the weather service.

In a traditional cold front that is pushed by the jet stream, forecasters can usually narrow the period of peak expected rainfall to between six and nine hours.

A cold front will also sink southwards, bringing heavy rain.