The National Hurricane Center says there is a 50-50 chance that "an elongated area of low pressure" heading toward the Caribbean Sea could develop into a tropical storm or hurricane within the next 48 hours.
At 2 p.m. EDT, the Hurricane Center said the disorganized showers and thunderstorms located several hundred miles east of the southern Windward Islands have become better organized over the past few hours, and could develop as it moves west-northwestward at 10 to 15 mph across the Lesser Antilles and into the Caribbean.
"After that time, land interaction could limit development potential over the weekend," the Hurricane Center said.
Regardless of formation into a tropical storm or hurricane, gusty winds and heavy rainfall are possible across portions of the Lesser Antilles, Puerto Rico and the Virgin Islands on Thursday night and Friday, the Hurricane Center said.
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There is a 60 percent chance the disturbance will form into a tropical storm or hurricane in the next five days.