The peak of the latest storm passed through San Diego County Thursday night, bringing a period of heavy rainfall that caused flooding in some parts of the region.

The region was getting drenched Thursday by an atmospheric river — a column of moisture out of the west that flowed into north coastal San Diego County just after 5 p.m. and was expected to spread

A winter storm is moving out of the San Diego area Friday but brought much-needed rainfall and gusty winds that led to some flooding and downed trees. As of late morning, the most powerful storm of the season had dropped anywhere from a tenth of an inch to nearly three inches of rain across the county over its three-day stay over the region.

A flood watch is in effect until Thursday along the San Diego County coast, including San Diego, Carlsbad, Poway and Chula Vista.