 Barrel is the earliest Category 4 hurricane on record in the Atlantic, says ABC News forecaster Dan Amirante. It's likely going to cross over the Windward Islands, likely as a major hurricane, a Category 3 or even possibly 4, hopefully not a 5. And then after that, it will cross into the Caribbean Sea, making a run in the direction of Jamaica. He says people along the Gulf Coast and Mexico's Yucatan Peninsula are urged to keep track of the hurricane.