In an unprecedented event, San Francisco experienced its first-ever tornado warning as a powerful atmospheric river swept through the region, bringing severe storms and winds reaching up to 60 mph. Residents were urged to take shelter as the warning took effect early Saturday morning. The unusual weather patterns, which also included heavy rain, ice, and snow, startled many locals, prompting questions about the necessity of such a warning. The tornado threat has since been lifted, but the city remains on alert for potential storm impacts.