Colorado State University forecasters predicted activity will pick up over the next couple of weeks.
Tropical Storm Gabrielle is expected to become a hurricane later this weekend or early next week.
Extremely warm waters in the Gulf could lead to rapid intensification of any systems and little time to prepare.
Activity in the tropics is picking up after a quiet period during what is normally the peak of hurricane season.
Tropical Storm Gabrielle formed in the central Atlantic Sept. 17, becoming the first named storm since Fernand in late August.
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Gabrielle is expected to become a hurricane later this weekend or early next week