Tropical Storm Dolly has formed in the western Caribbean sea. The National Hurricane center issued a tropical storm warning Sunday for the Yucatan Peninsula of Mexico from the border with Belize to Campeche, Mexico. At 11:45 a.m. eastern time, the center of the storm was about 270 miles east of Chetumal, Mexico, and 230 miles southeast of Cozumel. Maximum sustained winds are about 45 miles per hour. Dolly is moving toward the northeast at 17 miles per hour, and forecasters expect it to continue moving in this direction for the next two days. This is the fourth tropical storm of the Atlantic hurricane season, which runs through the end of November.