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Showers, thunderstorms through Saturday

September 30, 2010 |  9:58 am

Showers and thunderstorms could douse much of the Southland through Saturday, following a week that began with record-breaking heat, according to National Weather Service forecasts.

“We’re looking at moisture streaming in from the south to bring a slight chance of showers and thunderstorms through Saturday,” said Bill Hoffer, a spokesman for the weather agency. “Temperatures will cool through the weekend, but we’re looking for warming Monday through Wednesday as up-shore flows once again return.”

The Los Angeles County coastal region and areas including downtown Los Angeles, Malibu, Santa Monica, Beverly Hills, Hollywood and Long Beach are expected to be partly cloudy Thursday with a 20% chance of showers and thunderstorms, Hoffer said.

Temperatures will range from the mid-70s to low 80s at the beaches to around 90 degrees inland Thursday, dropping Friday to highs in the 70s at the beaches to the mid-80s inland, according to the weather service.

By Saturday, temperatures at the beaches are expected to further decline to highs in the upper 60s with inland temperatures in the upper 70s, Hoffer said. The cooling trend will shift slightly by Monday, and Tuesday will see inland highs surge to the upper 70s and upper 80s.

A high-surf advisory is in effect for the Los Angeles County coastal region with waves rising to between 2 and 4 feet, Hoffer said.

“The rip current potential is high,” Hoffer said. “Very strong currents and dangerous swimming conditions are expected.”

Waves off west-facing beaches could surge to 6 feet, according to weather service forecasts.

-- Ann M. Simmons