Flood in Alameda County, California

Connector between southbound Interstate 680 and eastbound Interstate 580 was flooded.

An intense storm system came through the Bay Area and Central Coast through the night of Friday December 13 into Saturday December 14 as a cold front combined with a developing low pressure system off the California coast, causing numerous weather impacts throughout the region. Among the notable impacts from the system, a confirmed EF1 tornado touched down in Scotts Valley, the first recorded tornado warning in San Francisco received significant public and media attention, strong gusts associated with a squall line caused multiple weather impacts across the region, and most of the city of Monterey and the surrounding cities of Seaside and Marina lost power on Saturday morning and did not get it back until the following Sunday afternoon and evening.