"Wednesday Forecast: NWS Predicts Excessive Rainfall"

A cold weather front has brought rainstorms to downtown San Francisco, with meteorologists warning of an "atmospheric river" that will bring intense rainfall and heavy snow in the Sierras. The National Weather Service has announced a slight risk for excessive rainfall in Northern California on Wednesday, with Napa, Sonoma, and Marin counties expected to be the most impacted. Residents are advised to be cautious of rapid rises in creeks and streams, ponding of water on roadways, and increased risk of shallow landslides in slide-prone areas.