Photo: OnSceneTV

A storm headed for the Southland Friday is expected to drench parts of Los Angeles County with a slight possibility of mudslides and heavy traffic before clearing out early Saturday afternoon, forecasters said.

The storm is expected to reach the county not long after midnight and linger for about 12 hours, producing between a half-inch and an inch of rain, National Weather Service Meteorologist Andrew Rorke said.

No serious flooding, debris flows or mudslides are expected as a result of this system. But they are not totally inconceivable.

The Woolsey fire zone in Ventura and Los Angeles counties will be the area of greatest concern, Rorke said, and the threat will increase in case of thunderstorms.

Then beginning Sunday, storms will slide in “one after the other” through Thursday, possibly producing 2 to 4 inches of rain, Rorke said, indicating three weather systems may be involved.

“We’re expecting 12 to 18 hours of dangerously heavy rain,” he said.

But with various models in conflict, it’s not possible to say when or where that dangerous period will take place, Rorke said.

Along the coast, a high surf advisory will be in effect from 2 a.m. Saturday to noon Sunday in Los Angeles and Orange counties. Breaking waves of 7 to 10 feet are expected to occur, most likely on exposed west-facing beaches.

Los Angeles County officials are cautioning residents of recent burn areas such as the Woolsey, Creek and La Tuna fires to monitor local news outlets, avoid driving through moving or ponded water and report storm-related emergencies to (800) 675-HELP (4357).

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