MIAMI — Tropical Storm Roslyn has grown stronger than expected in the Pacific far off Mexico’s coast.

The U.S. National Hurricane Center says the storm’s maximum sustained winds Monday afternoon are near 50 mph (81 kph). Weakening is forecast for the next two days, and Roslyn is expected to become a tropical depression Tuesday night.

Roslyn is centered about 715 miles (1,151 kilometers) southwest of the southern tip of Mexico’s Baja California peninsula and is moving northeast near 3 mph (6 kph).