As Hurricane Erin moves away from the United States, the National Hurricane Center is watching three waves in the tropics for possible development – including at least one that could form this weekend.

On Thursday, Hurricane Erin was several hundred miles off the coast of North Carolina and pushing storm surge and deadly rip currents toward the shore. Three other systems may form right behind.

Hurricane Erin’s core missed the U.S., but the cyclone led to flooded roadways and eroded dunes. Coastal flooding was reported in North Carolina, Virginia, Delaware, New Jersey and New York.