Sandy's maximum sustained winds early Tuesday are near 45 mph (75 kph). But the U.S. National Hurricane Center says Sandy is forecast to be a hurricane when it nears Jamaica on Wednesday.
The storm is centered about 325 miles (525 kilometers) south-southwest of Kingston, Jamaica, and is moving north-northeast near 3 mph (6 kph).
Meanwhile, a tropical depression in the Atlantic is expected to become a tropical storm later in the day. The depression's maximum sustained winds are near 35 mph (55 kph). The depression is centered about 825 miles (1,325 kilometers) northeast of the Leeward Islands and is moving north-northeast near 12 mph (19 kph).