A low-pressure system sweeping into Southern California will produce light rain throughout San Diego County on Wednesday evening and continue into Thanksgiving Day. The National Weather Service office in San Diego said the majority of the rainfall is expected late Wednesday evening and early Thursday morning. Escondido and Oceanside are expected to receive around a quarter-inch of rainfall, while one-tenth of an inch is expected near the coast and in the western valleys. The mountains are forecast to get between a quarter-inch and one-third inch, and the deserts less than one-tenth of an inch.