The U.S. National Hurricane Center says Tropical Storm Sonia has been downgraded to a tropical depression as it hit land in Mexico.
The center in Miami said the center of Sonia reached the coast of Sinaloa near the city of El Dorado early on Monday.
It's maximum sustained winds have decreased to near 35 mph (55 kph), and it will likely dissipate later today over mountainous terrain of Mexico.
The center said that even though Sonia was weakening, heavy rains are still possible in Sinaloa, western Durango, and southern Chihuahua.
The government of Sinaloa state said school classes were canceled for Monday in five municipalities that could be affected by the storm.