Tropical Storm Barbara formed off the southern coast of Mexico on Sunday morning, and forecasters say it's expected to become the first hurricane of the season in the Eastern Pacific.

A tropical storm is a tropical cyclone that has maximum sustained winds between 39 and 73 mph – an upgrade from a tropical depression.

A busy start to the hurricane season in the eastern Pacific Ocean got even busier Saturday morning as the National Hurricane Center has now added a third area to watch for possible tropical ...