Possibly an inch of warm rain expected today; cooler wet weather this weekend

SAN DIEGO - Up to an inch of warm rain is expected throughout San Diego County today ahead of cooler but more scattered wet weather this weekend, forecasters said.

A low pressure trough about 400 miles west of San Diego will draw warm, moist subtropical air into Southern California through this evening, according to the National Weather Service. The agency said there would be brief periods of heavy rain and isolated thunderstorms as the chance of rain increases throughout the day.

''The rain chances will increase tonight and remain high through tonight as the center of the trough moves closer,...