sentences:  Deep convection reformed near the center on November 18, resulting in a slight increase in winds, though vertical shear quickly weakened it again.Later that day, the storm made its closest approach to land, about 225 miles (360 km) southwest of Michoacán.Early on November 20 it degenerated into a tropical depression, and later that day Sergio dissipated about 360 miles (580 km) southwest of Manzanillo, Mexico, or about 320 miles (515 km) west-northwest of where it originally formed.