Tropical Storm Rina, which has maximum sustained winds of about 40 mph, has formed over the northwestern Caribbean Sea on Sunday night, according to the National Hurricane Center.
Rina, which is about 450 miles southeast of Cancun, Mexico, and about 730 miles south-southwest of West Palm Beach, is moving north-northwest at about 8 mph.
The NHC predicts the center of Rina to stay on a general northwestern path before taking a turn toward the north and the Yucatan Peninsula sometime Thursday, when forecasters say they expect the storm to become a hurricane, though that remains at the far end of the five-day forecast.
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