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US Open of Surfing evacuated as thunderstorms roll through SoCal

File: Schoolchildren race back to their bus after getting caught in heavy rain during a school excursion, as the strongest storm in six years slams Los Angeles on Feb. 17, 2017. More thunderstorms are forecast this week.
File: Schoolchildren race back to their bus after getting caught in heavy rain during a school excursion, as the strongest storm in six years slams Los Angeles on Feb. 17, 2017. More thunderstorms are forecast this week.
Mark Ralston/AFP/Getty Images

A surge of monsoonal moisture has brought showers, thunderstorms and lightning to parts of Southern California. A severe thunderstorm moved through Southern California on Tuesday afternoon, with 60 mph wind gusts and nickel-sized hail, according to the National Weather Service. Warnings were issued for Riverside and Orange counties.

The storm forced the closure of the U.S. Open of Surfing due to lightning strikes seen in the area, according to the Huntington Beach Police Department. The beach was evacuated, but later reopened.

The National Weather Service has posted flash flood watches Tuesday through Wednesday for the mountains of Los Angeles and Ventura counties as well as the high desert Antelope Valley. Recently burned areas are at a higher risk for flash flooding and debris flows.

The threat of thunderstorms will extend across the coastal waters through Thursday, and the weather service advises sailors to check forecasts before leaving harbors.

https://twitter.com/NWSLosAngeles/status/892238454280642560

This story has been updated.