An area of low pressure being monitored in the western Gulf developed into a tropical depression Saturday that forecasters said could strengthen into a tropical storm by the time it makes landfall in Mexico.

The depression is expected to strengthen over the next 24 hours, likely to hit the Mexican coastline Monday as Tropical Storm Barry.

Barry made landfall as a tropical depression off the eastern Gulf Coast of Mexico on Sunday night, and was expected to bring heavy rains and flash flooding to the North American nation over the next few days.