Forecasters say a tropical depression has formed in the Pacific off Mexico's western coast, and it could become a tropical storm in the next day, AP reported. On Sunday afternoon, the depression was centered about 400 miles (640 kilometers) south-southeast of the southern tip of Baja California. The storm's top sustained winds are 35 mph (55 kph). Forecasters at the U.S. National Hurricane Center in Miami say the system should get stronger and could become a tropical storm late Sunday or Monday. The depression is moving to the north-northwest near 6 mph (9 kph). The five-day forecast track shows the system could clip the southern part of Baja California later in the week.