A tornado touched down in Santa Cruz County on Saturday, downing trees and flipping over cars, the National Weather Service’s Bay Area office confirmed after surveying the scene. At 1:39 p.m. on Saturday,

Inclement weather has plagued areas of the U.S. in the first half of the weekend, with dangerous conditions including heavy snow, a major ice storm and unusual tornado activity.

Powerful storms swept through parts of Northern California on Saturday, knocking down trees, causing widespread power outages and prompting weather officials to issue what they said was the first-ever tornado warning for San Francisco.

San Francisco experienced its first-ever tornado warning early Saturday, stunning residents as a powerful storm swept through the Bay Area, bringing heavy rain and winds. The warning prompted a flood of social media posts from residents startled awake by emergency alerts.