A tornado warning was issued by the NWS San Francisco CA on Saturday at 5:51 a.m. "At 5:51 a.m., a severe thunderstorm capable of producing a tornado was located near Daly City, moving northeast at 45 mph,

Some San Francisco residents were jolted awake by a tornado warning from the National Weather Service early Saturday.

A strong atmospheric river drenched northern California with heavy rains and damaging wind gusts Saturday, leaving well over 200,000 without power in the state.