More snow and rain is in the forecast Friday for parts of San Diego County and a winter weather advisory is in effect for the mountain areas.

Back-to-back storms are expected to bring San Diego County rain clouds, gray skies and precipitation for much of the week.

Photos: San Diegans were surprised to see hail falling Sunday evening as scattered rainfall fell across the region.

Despite conditions clearing, a heavy shower or thunderstorm could be in the forecast for southern parts of the county between 8 p.m. Friday and midnight, according to the National Weather Service.

San Diego County was predicted to get the most rainfall of the season so far from this week’s atmospheric river weather system, and the storm did not disappoint.