MEXICO CITY — The first tropical storm of the eastern Pacific hurricane season formed well off the coast of Mexico on Wednesday, but forecasters said it's not a threat to land.

The U.S. National Hurricane Center said Tropical Storm Aletta was centered about 410 miles (655 kilometers) southwest of Manzanillo, Mexico, Wednesday afternoon. It had maximum sustained winds of 45 mph (75 kph) and was moving west at 8 mph (13 kph).

The center said Aletta is likely to become a hurricane by Thursday as it moves westward into the Pacific.