Cumulus Cloud
A towering cumulus cloud looking east from the National Weather Service, San Diego, office. Photo via @NWSSanDiego Twitter

Monsoon moisture was predicted to return to San Diego County Sunday, perhaps remaining in place for much of the week ahead, with daily chances for showers and thunderstorms in the mountains and the desert slopes each afternoon, the National Weather Service said.

Marine layer clouds were expected Sunday over the coast and valleys, with coverage spreading about 25-30 miles inland.

Forecasters also issued a flood advisory for portions of far northern San Diego County into Riverside County. Motorists can expect minor flooding along portions of Highway 74 between Mountain Center and Anza, according to the NWS.

High temperatures along the coast Sunday are predicted to reach 76 degrees, 77 to 82 in the western valleys, and 87 to 92 near the foothills, 86 to 93 in the mountains and 102 to 107 in the deserts, according to the weather agency.

Temperatures may run slightly below normal this week given the increased moisture, but it could feel muggier in the monsoon pattern.

No hazardous marine weather was expected through Thursday.

City News Service contributed to this article.

Updated 4:10 p.m. July 24, 2022