It was lifted soon after. This is thought to be the first recorded tornado warning in the area, the National Weather Service told USA TODAY. But severe weather remained a threat in the region with an atmospheric river event expected to bring gusty winds and very heavy rain,

San Francisco residents were woken up by a tornado warning early Saturday morning during a powerful storm system that battered the region with heavy rain and wind.

Less than two weeks after a tsunami warning, residents were jolted awake before 6 a.m. to consider a new potential disaster scenario.