A slow-moving rainstorm that moved south from Northern California triggered a rare tornado warning in Southern California on Thursday, and Ventura County, north of Los Angeles, experienced historic flooding. Tornado Warning continues for Ventura County, CA until 2:30 AM PST pic.twitter.com/xfy8KL0Td0 — NWS Los Angeles (@NWSLosAngeles) December 21, 2023 UPDATE: The US 101 southbound off-ramp