Southern Florida was hit with heavy rainfall and gusty winds Saturday as a storm system flooded streets, stranded cars and threatened to form into a tropical storm after passing over land.

The storm system, dubbed Potential Tropical Cyclone One by the National Hurricane Center, would be named Alex if it becomes a tropical storm.

The National Hurricane Center warned of considerable flash flooding across South Florida and heavy rains across the Florida Keys and the northwestern Bahamas. Tropical storm conditions were forecast for Saturday in Florida and in the northwestern Bahamas by afternoon.

The center also forecast maximum sustained winds of 40 mph with higher gusts, and rainfall of about 6 to 10 inches in South Florida with isolated highs of 15 inches. 

HURRICANE SEASON UNDERWAY:Tropical storm watch issued for South Florida where a foot of rain is possible

By early Saturday afternoon, between 7 and 13 inches had already fallen in Miami, according to the National Weather Service in Miami.

“After nearly a foot of rain, a very dangerous situation has unfolded with cars submerged and stranded underwater” in southern Florida, according to AccuWeather.

Miami already saw flash flooding Saturday morning as fire crews responded to multiple reports of cars stuck in floodwaters and advised residents to stay off roads.