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.

A tornado near a mall in central California swept up cars, uprooted trees and sent several people to the hospital. In San Francisco, authorities issued the city's first-ever tornado warning.

Inclement weather has plagued areas of the US, with 84 centimeters of snow reported in parts of upstate New York