sentences:  With light vertical wind shear and warm water temperatures, the convection concentrated around a developing low-level circulation, and on August 22 it organized enough for the National Hurricane Center to classify it as Tropical Depression Nine-E while it was located about 115 miles (185 km) west of the Mexico mainland or about 220 miles (345 km) southeast of the southern tip of the Baja California Peninsula.With an anticyclone located over the southwestern United States and a ridge extending southward into northwestern Mexico, the National Hurricane Center initially predicted the depression to track generally west-northwestward out to sea and reach peak winds of 50 mph (85 km/h).The tropical depression moved slowly northwestward, with the slow motion persisting for its entire lifetime due to the storm being embedded within the weakness of a mid-level ridge to its north.