"This is a concern for Caribbean interests – from Honduras and Nicaragua to parts of Cuba, Jamaica, Haiti, and the Dominican Republic – not us stateside in the U.S.," Lowry said.

Invest 98L in the eastern Caribbean is expected to strengthen into a tropical depression or tropical storm early this week.

“As far ahead as we can reasonably forecast – about 10 days – there is no sign of a threat to the mainland U.S.,” Norcross wrote.