Tropical storm forms off Mexico's Pacific coast

MEXICO CITY, July 15 (Reuters) - Tropical Storm Dolores formed off Mexico's Pacific coast on Wednesday but it was expected to move further west out to sea later this week, the U.S. National Hurricane Center said on Wednesday.

Dolores was located 660 miles (1,065 km) southwest of the tip of the Baja California peninsula with maximum sustained winds near 40 mph (65 kph), occasionally gusting higher.

"Some additional strengthening is forecast during the next 24 hours," the Miami-based center said.

Mexico's main oil exporting port on the Pacific coast is Salina Cruz, where the country's oil company Pemex also operates a refinery. (Reporting by Cyntia Barrera Diaz; Editing by Pascal Fletcher)