The Bay Area was soaked by a powerful storm system overnight into Saturday morning, causing flooding and even triggering what is reported to be the first-ever tornado warning in San Francisco, officials said.

Following the first cold-front system that brought moderate showers to the Bay Area earlier this week, a wetter and stronger storm system is forecast to bring several more rounds of rain by late Friday and into the weekend,

The Bay Area is bracing to receive another heavy dose of rain accompanied by gusty and damaging winds that began Friday evening.