The tides began peaking Saturday morning.
COASTAL FLOOD ADVISORY pic.twitter.com/QdRBCzSFAS— SAN FRANCISCO FIRE DEPARTMENT MEDIA (@SFFDPIO) January 2, 2022
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The large swells occur at new and full moons when the Earth, Moon, and Sun are aligned.
Minor coastal flooding is expected at low-lying coastal locations across the San Francisco Bay shoreline, according to the National Weather Service.