After a night of record low temperatures, expect a gradual warm-up Thursday after a cold start. Elita Loresca has the forecast for Thursday, Dec. 20, 2012.
Temperatures in Southern California are climbing out of a deep freeze that generated record-low temperatures overnight in Lancaster and Palmdale.
In Lancaster, the temperature dropped to a record low of 13 degrees overnight. The previous record of 15 degrees was set in 2006, according to the National Weather Service.
In nearby Palmdale, the temperature dropped to 18 degrees -- one degree lower than the previous record set in 2006.
Another record low was set in Santa Barbara, where readings dipped ot 31 degrees, also the lowest since 2006.
Frost advisories, shown in the map below, were in effect Thursday morning for much of the region.
"It's been years since I've seen a frost advisory for everywhere except the coastal plain," said NBC4 forecaster Fritz Coleman. "Everybody's going to feel it."
The ovenight low dipped to 43 degrees in Los Angeles.
Sensitive plants could be damaged or killed if left outdoors overnight, forecasters said. The cold weather also poses a threat to animals kept outdoors and crops.
Valley and inland temperatures are forecast to warm into the mid-60s Thursday.