MEXICO CITY (AP) -- Tropical Storm Andres is strengthening off the southwestern coast of Mexico early this morning and forecasters say the coming days could see it become a hurricane.

It was too soon to tell if the storm will make landfall, but a tropical storm watch has been issued along part of the coast.

Late last night, Andres became the first named storm of the Eastern Pacific hurricane season, which began May 15 and ends November 30 and is typically busiest between July and September.

Andres was a late arrival. Forecasters say it's been 40 years since it took so long in the Eastern Pacific season for a named storm to come along.