Scattered showers are expected early this week for San Diego County, with a slight chance of thunderstorms in the afternoon into Monday morning for the coast, valleys and mountains. A winter weather advisory will remain in effect until at least 4 p.m. Monday, with chances of snowfall for county mountains, according to the National Weather Service.

Overnight, isolated lightning strikes were reported, primarily over coastal waters and nearby land areas, but thunderstorm chances were expected to decrease by Monday morning.