A warning covering an area with about 2,200 residents told people to take shelter because flying debris was expected. By John Yoon A winter storm in Northern California spawned a tornado on Friday ...

On Monday, widespread precipitation and heavy mountain snow are expected across the Northwest ... could contain damaging winds and perhaps a few tornadoes between central Oklahoma and North ...

In San Francisco, authorities issued the first-ever tornado warning. Elsewhere, inclement weather plagued areas of the U.S., with dangerous conditions including heavy snow in upstate New York ...