A fast-moving storm will bring a chance of rain and snow in San Diego County Thursday before exiting by midday Friday, according to the National Weather Service. The cold front moving down the coast is expected to bring a drop in temperatures, gusty winds out of the west, a chance of rain everywhere except deserts areas and a chance of snow in the mountains, forecasters said.

The rain is expected to start falling this evening, then linger overnight before the storm system leaves by Friday afternoon. Rainfall totals could reach 1 inch in the mountains, while a quarter- inch of rain is expected in coastal areas and the western valleys.