The warning is for the southern part of the county, along I-5 from Redding to Anderson, according to the NWS Sacramento.
[Ads /]
Residents are advised to take shelter.
RELATED: San Jose woman caught in deadly Missouri tornado outbreak while running across country
Officials say half-dollar-sized hail could accompany the tornado.
[Ads /]
A viewer sent ABC7 News photos of the tornado cell:
Go here for tips on how to prepare for a tornado.