Two tropical storms are swirling in the Pacific Ocean off Mexico, and one is forecast to become a hurricane and approach the country’s west coast late next week. Tropical Storm Willa is the 21st named storm of the eastern Pacific hurricane season. It was about 280 miles (450 kilometers) south-southwest of the port city of Manzanillo on Saturday afternoon with maximum sustained winds of 60 mph (95 kph). The U.S. National Hurricane Center said it w…