A southward shift in Erin’s track has led to an increase in risk for the northern Caribbean Islands, though a direct hit in the United States is unlikely.

Tropical Storm Erin is expected to strengthen into a hurricane later this week in the Atlantic Ocean, according to the National Hurricane Center.

Tropical Storm Erin hasn't gained much strength since forming on Monday over the Atlantic, but the National Hurricane Center says that should change soon as the storm moves west toward more favorable conditions for development.