Thunderstorm chances increase on Wednesday and Thursday across Northern California. These storms could be strong and a few funnel clouds or a tornado can't be ruled out. The Storm Prediction Center has a portion of the Central Valley under a marginal thunderstorm threat on Wednesday.

A storm that moved into Northern California overnight is resulting in power outages, flooded roads and downed tree limbs.

A lot of weather will be impacting Northern California through the holiday, with valley winds and thunderstorms, and heavy Sierra snow.

The National Weather Service issued San Francisco with a tornado warning on Saturday, the first in the city's history. ABC7 News Meteorologist Lisa Argen says the closest San Francisco ever got to another tornado warning was back in the 1980s. CAL FIRE is ...

A Tornado Warning has been issued for parts of Santa Cruz County on Christmas, the National Weather Service said. The warning includes Santa Cruz, Scotts Valley and Capitola until 1 p.m. Aviso de Tornado incluye Santa Cruz CA, Scotts Valley CA, Capitola CA hasta la 1:00 PM PST pic.twitter.com/BuaaTIWxx2

Portions of Northern California are bracing for a powerful atmospheric river storm beginning Tuesday night, with forecasters warning that the system is expected to be more disruptive due to its intense winds than its rainfall. The National Weather Service ...

Footage released by CHP shows crews using a ladder to carefully slide the baby in a carrier over the raging river. Nine people were rescued after the home they were in became surrounded by the raging South Yuba River.

Days into an atmospheric river event that has deluged the state since the weekend, officials warned of heavy rains and flood risks in Southern California.