Frost advisory chills inland valleys

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A frost advisory has been issued for San Diego County valleys and deserts.

SAN DIEGO – Overnight temperatures in the 30s may cause frost to develop in San Diego County’s inland valleys early Wednesday.

A National Weather Service frost advisory for the valleys will remain in effect until 8 a.m.

“It has been a chilly night, the coldest of the winter season so far,” according to the weather service.

Forecasters urged residents in colder areas to make sure pets had a warm place to stay and to cover sensitive outdoor plants.

A daytime high of 49 degrees in Alpine Tuesday was 1 degree lower than the previous lowest maximum temperature record for the date, set in 2008. Temperatures of 54 in El Cajon and 55 in Vista also fell below prior records of 59 and 55, set in 2004 and 1971, respectively, according to the NWS.

Forecasters said “chilly days and downright cold nights” were expected through the remainder of the week, with gusty winds developing Friday, but “the abundant sunshine will help us cope.”