Tropical Storm Miriam Quickly Weakening off Mexico U.S. forecasters say Tropical Storm Miriam is fast weakening off Mexico's Baja California peninsula. The National Hurricane Center in Miami said that Miriam had top sustained winds of 45 mph (72 kph) at 11 p.m. EDT Wednesday, down sharply from a day earlier when it was a hurricane. The storm is centered about 385 miles (620 kilometers) west-southwest of the southern tip of the Baja peninsula. Miriam is moving northwest at 7 mph (11 kph). No coastal watches or warnings are in effect and more weakening is expected. In the eastern Atlantic, Tropical Storm Nadine lingered far from land. It is about 640 miles (1030 kilometers) south-southwest of the Azores islands with top sustained winds of about 50 mph (80 kph), and is moving southwest at 6 mph (10 kph).