Hurricane Sandy is a massive, late-season tropical cyclone that has affected Jamaica, Cuba, the Bahamas, Haiti, the Dominican Republic, and the southeastern United States, and is currently affecting the East Coast of the United States and Eastern Canada. The 19th tropical cyclone, 19th named storm, and 10th hurricane of the 2012 Atlantic hurricane season, Sandy developed from an elongated tropical wave in the western Caribbean Sea on October 22. It became a tropical depression, quickly strengthened, and was upgraded to a tropical storm six hours later. Sandy moved slowly northward toward the Greater Antilles and gradually strengthened.
On October 24, Sandy was upgraded to a hurricane, shortly before making landfall in Jamaica. Upon moving farther north, Sandy re-entered water and made its second landfall in Cuba during the early morning of October 25 as a Category 2 hurricane. During the late evening of October 25, Sandy weakened to Category 1 strength; in the early hours of October 26, it headed north through the Bahamas. Sandy briefly weakened to a tropical storm in the early morning hours of October 27, then restrengthened to a Category 1 hurricane later that morning and remained that strength through the evening of October 28. At 11 p.m. EDT on October 28, Sandy surpassed 2010's Hurricane Igor to become the largest hurricane in Atlantic history, with a maximum gale-force wind diameter of 930 mi (1500 km). Shortly after midnight October 29, Sandy turned to the north. Just before 8 a.m., Sandy turned to the north-northwest and started to make its expected approach towards the U.S. coast.
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