The U.S. National Hurricane Center said Monday that Tropical Storm Sonia has been downgraded to a tropical depression as it hit land in Mexico, according to AP. The center in Miami said the center of Sonia reached the coast of Sinaloa near the city of El Dorado early on Monday. Its maximum sustained winds have decreased to near 35 mph (55 kph), and it will likely dissipate later Monday over Mexico's mountainous terrain. Even though Sonia is weakening, heavy rains are still possible in Sinaloa, western Durango and southern Chihuahua, the center said.