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. Two other systems may form right behind.

Hurricane Erin's path will not bring its strongest winds ashore. However, it continues to grow in size, and its impacts from high surf, rip currents and coastal flooding are already increasing along parts of the East Coast.

Invest 99L and a tropical wave have a medium chance of becoming tropical depressions later this week. The National Hurricane Center is tracking three systems in the Atlantic, according to the latest advisory from the National Hurricane Center.