A strong storm swept the Southeast United States Saturday morning and will move northward along the East Coast through the weekend, bringing drenching rains, gusty winds and likely enough coastal flooding to inundate waterfront homes and businesses and cause beach erosion.

A variety of impacts are possible with this system, including power failures, road closures and airport delays, forecasters said.

The National Weather Service has issued storm, flood and wind advisories, watches and warnings for much of the East Coast, from South Carolina to southern New England.

Key things to know:

What’s the timing? The storm was on track to affect southeastern states from Saturday into Sunday, the Mid-Atlantic from Sunday into Monday, and southeastern New England from Sunday into Tuesday.

What are the hazards? The most concerning hazard is a significant risk of flooding, beach erosion and rough surf at the coast. Widespread heavy rain that could lead to flooding is expected across the East Coast, along with damaging winds up to 60 miles per hour at the coast, and up to 40 m.p.h. inland.

Which areas will be most affected? Stormy weather is expected from South Carolina into New England, with the most extreme weather likely occurring at the coast. The risk for significant coastal flooding from ocean waters will likely be highest in the Mid-Atlantic, especially along the coasts of Delaware, southern New Jersey and the Virginia Tidewater, a low-lying area of eastern Virginia named for the tidal rivers that flow through it.