Lightning strikes and brief, heavy downpours spread across Southern California overnight, with the risk of showers and potential flooding continuing through the day Thursday. “A lot of this is just energy being pushed in from a tropical storm.

On Wednesday, just before 2:15 p.m., NWS added a Marine Weather Statement for people on boats or recreating out on the waters from San Mateo Point down to the U.S.-Mexico border.

In the Bay Area, scattered showers could pop up after 11 a.m. Thursday, but the most likely chance of sustained rain will be in the South Bay and Central Coast this afternoon. Rainfall totals are not expected to reach the levels experienced in Southern California.

Residents across Southern California should prepare for a mix of showers, isolated thunderstorms and strong winds through Friday, Sept. 18.

The extreme weather could lead to new fires, flash floods, and strong rip currents, the National Weather Service warns.

The peak of the tropical storm is expected Thursday, a system that could bring thunderstorms — and even possibly small tornados

A thunderstorm outbreak associated with the remains of Tropical Storm Mario will likely hit California later this week.