San Mateo County was last issued a tornado warning on March 18, 2011. “It’s certainly unusual. We don’t see the ingredients come together all the time for tornadoes,” Bain said.

Tornado Warning issued for parts of Nevada and Yuba counties ... A series of tornado warnings held far Northern California captive for most of Saturday evening. Mar 29, 2014; ...

A winter storm in Northern California spawned a tornado on Friday, setting off a warning for people to seek shelter urgently. The tornado was confirmed around 5:30 p.m. local time near Paynes ...

The warning was for people in northern central Tehamd County and southern central Shasta Count and is in effect until 6 p.m. on Friday."At 5:22 p.m., a confirmed tornado was located near Paynes ...

(FOX40.COM) — A Tornado Warning was issued in several parts of Northern California, Monday afternoon.• Video Above: Tornado Watch vs. Tornado Warning At around 3:14 p.m., a severe thunderstorm ...

A potent winter storm targeting Northern California this weekend brought what appears to be the first official tornado warning on record for the city of San Francisco on Saturday morning. Updated ...

Johnson said preliminary reports indicate the tornado spawned by the fire was the equivalent of an EF-1, which packs three-second wind gusts between 86 mph and 110 mph, or an EF-2, with three ...

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 first-ever tornado warning.

The tornado warning on Saturday, which was in effect for about 30 minutes, was urgent: “Take shelter now in a basement or an interior room,” it read in part.

The U.S. National Weather Service has issued a tornado warning for parts of Northern California. The NWS told people to "take shelter now." Video above from Scotts Valley tornado. The warning was ...