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,

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.

Residents in portions of San Francisco and San Mateo counties were awoken early Saturday to a tornado warning from the National Weather Service. "Take shelter now in a basement or an interior room on the lowest floor of a sturdy building,