They're much more common than tornadoes. Here's why severe thunderstorms are dangerous and why you should take action when a warning is issued.

"The storms which prompted the warning have weakened below severe limits, and no longer pose an immediate threat to life or property. Therefore, the warning will be allowed to expire. However, gusty winds are still possible with these thunderstorms," states the NWS Los Angeles/Oxnard CA. The warning is in effect until 9:30 p.m.

Marin Coastal Range, Sonoma Coastal Range, North Bay Interior Mountains, Coastal North Bay including Point Reyes National Seashore and North Bay Interior Valleys are the focus of a weather alert

A huge storm system crossing the U.S. threatens to unleash tornadoes Friday in the Mississippi Valley, blizzards in the northern Plains and dry, gusty conditions in Texas and Oklahoma that pose an extreme risk of wildfires.

A powerful storm dropping drenching rain on flood-prone Southern California is raising concern among forecasters that it could produce a dangerous, widespread outbreak of tornadoes, damaging winds and fires along with a blizzard as it crosses the entire United States in the coming days.

A cross-country tornado snow blitz threatens 100 million Americans with the ‘most severe’ storm outbreak of the year. ‘Dangerous, damaging and life-threatening’ weather conditions spanning half a million square miles will smash the US into mid-month.