Overview
- A coastal low expanded the marine layer Sunday, bringing low clouds, patchy fog and spotty drizzle to the Bay Area and Central Coast.
- Daytime highs will stay cool, generally in the upper 50s to lower 60s across much of the region, according to the National Weather Service.
- Rain amounts should be light, with up to about a quarter inch in the North Bay and only a few hundredths as far south as San Mateo County and into the East Bay.
- The marine layer is a shallow blanket of cool, moist ocean air that moves inland on onshore winds and often produces gray skies, fog and light drizzle.
- Forecasters expect the low to move east by midweek, bringing warmer, drier weather inland, with highs in the upper 70s to mid-80s by Thursday and Friday.