with dangerous conditions including heavy snow in upstate New York, a major ice storm in Midwest states, severe weather warnings around Lake Tahoe and unsual tornado activity in Central California.

In San Francisco, authorities issued the first-ever tornado warning. Elsewhere, inclement weather plagued areas of the U.S., with dangerous conditions ... melt the ice in most places.

In San Francisco, authorities issued the first-ever tornado warning. Elsewhere, inclement weather plagued areas of the U.S., with dangerous conditions ... melt the ice in most places.

Inclement weather has plagued areas of the U.S. in the first half of the weekend, with dangerous conditions including heavy ...