A westward-moving tropical wave could produce an area of low pressure in the tropical Atlantic late in the week of Aug. 18, the hurricane center said on Aug. 16. The center shows a 20% chance of storm formation over the next week.

Erin is the first hurricane to develop over the Atlantic this year, and meteorologists are closely tracking its path and forecast.

Hurricane forecasters continued to track a tropical wave off the coast of Africa Sunday morning as Hurricane Erin weakened to a Category 3 storm following an eyewall replacement cycle.