Tropical Storm Melissa continues to meander in the central Caribbean Sea on Oct. 23. With the storm now less than 900 miles from Florida, several key uncertainties remain, including its future path and intensity.

"It goes without saying, this is a very challenging track forecast," the National Hurricane Center said in an Oct. 22 forecast discussion . In addition, "the intensity forecast is also more uncertain than usual, in large part related to the track uncertainty."

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