After a weekend of staggering strengthening, Hurricane Erin remained a major hurricane Monday on its path skirting away from the United States. And following behind in the Atlantic is another system the National Hurricane Center has given a medium chance of further development.

Erin is a Category 4 hurricane again, the National Hurricane Center said in its 11 p.m. ET update Sunday, with sustained winds of 130 mph and tropical storm-force winds reaching out 230 miles. The storm was just under a thousand miles southeast of Cape Hatteras,

While Hurricane Erin will pass to the east of the U.S., we could still see impacts. Tropical storm force winds extend 200 miles from the center of the storm, as Erin continues to grow in size.