The chances of a cyclone forming behind Hurricane Erin have increased to 70 percent through the next seven days, according to forecasters at the National Hurricane Center (NHC).

"Shower and thunderstorm activity has become a bit more concentrated in association with a tropical wave located a few hundred miles east of the Leeward Islands," the agency said in an early-morning update on Thursday.

"Environmental conditions appear conducive for further development of this system, and a tropical depression is likely to form this weekend while it moves near or to the north of the northern Leeward Islands."

If the system were to strengthen further into a tropical storm, it would be named Fernand.

"FOX Model likes the idea of at least Tropical Storm Fernand (fair-NAHN) early next week," Noah Be

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