ST. PETERSBURG, Fla — Tropical Storm Melissa has formed southeast of New England.

The National Hurricane Center says Melissa is currently about 305 miles south-southeast of Nantucket, Mass. It's packing 50 mph winds and chugging to the northeast at 12 mph.

Forecasters expect the system to move away from the east coast of the United States and gradually weaken over the next couple of days. 

Melissa could lose its subtropical characteristics as early as Saturday night.

There are currently no coastal tropical cyclone watches or warnings in effect.

There is no threat to Florida.

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