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Daytime temperatures expected to warm up across Southern California

November 29, 2010 |  9:30 pm

Southern California can expect another chilly night, but powerful winds will help cause a gradual warm-up Tuesday in the wake of record low temperatures that were recorded across the region, forecasters said.

Daytime temperatures by Wednesday are expected to reach 70 degrees in coastal and valley areas for the first time in nearly two weeks, the National Weather Service said.

The rise in temperatures will be caused by strong northeasterly winds that will keep warm air closer to the ground and help heat up the area a few degrees during the night, according to the weather service.

“The windier things are,” said agency meteorologist Jamie Meier, “the warmer it stays at night.”

Wind advisories were issued late Monday for mountain areas and the Santa Clarita Valley, where gusts  up to 50 mph were expected. The weather service also issued a frost warning for inland valleys in San Diego County and Coachella Valley from 1 a.m. through 8 a.m. Tuesday.

On Monday, record low temperatures for the date were recorded or tied from Ventura to San Diego counties.

Camarillo Airport bottomed out at 33 degrees, breaking the record of 34 set in 2006, the weather service said. A 38-degree reading at Long Beach Airport tied a record set in 1968.

At Oceanside Harbor the low was 37 degrees, breaking by 1 degree a record set in 1968. Ramona recorded 24 degrees, which eclipsed a record of 28 degrees set in 1994.

Fire officials say the onset of colder weather often leads some people to use ovens to heat their homes, or to warm up their vehicles inside their garages, both of which can cause a buildup of deadly carbon monoxide gases.

“We encourage people to understand the dangers of carbon monoxide fumes, which claim as many as 400 lives each year” nationwide, said Brian Humphrey of the Los Angeles Fire Department.

-- Robert J. Lopez