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Waves of 8-12 feet, thunderstorms and cold temperatures on the way for Southern California

April 6, 2011 |  7:36 am

Image: National Weather Service

A new storm is moving into Southern California, which could see high surf Wednesday and thunderstorms Thursday.

Waves ranging from 8 to 12 feet high are expected to hammer the Southern California coast beginning Wednesday afternoon, the National Weather Service said. The powerful breakers are being kicked up by a northwest swell that is expected to increase in strength, creating dangerous conditions at area beaches, the Weather Service said.

The “primary impact of this system will be temperatures,” with the mercury falling into the 30s and 40s along the coast and in the valleys; temperatures could dip below freezing in the Antelope Valley, the NWS said.

The Grapevine on Interstate 5 could see snow showers and gusty winds Thursday night into Friday morning, the weather service said.

Forecasters called the storm “exceptionally cold for this time of year, but with not a lot of moisture and as a result not much in the way of precipitation.” The valleys could see 0.10 to 0.25 inches of rain, while the mountains could see 0.25 to 0.5 inches.

The cold low-pressure system is moving south from Alaska along the West Coast. Showers could last through Saturday.

Temperatures are expected to get back to normal by Sunday.


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Image: National Weather Service