Tropical Storm Andres has reached wind speeds of 50 miles per hour, and is expected to strengthen -- with the possibility of becoming a hurricane during the next couple of days.
At 5 a.m. EDT the National Hurricane Center said Andres was located about 190 miles south of Zihuatanejo and 310 miles south-southeast of Manzanillo.
A tropical storm watch is in place for both Zihuatanejo and Manzanillo, although it is not clear how close the storm will come to making landfall.
At this point, there are no cruise ship itineraries impacted, but we'll keep you posted as the storm develops.
For more tips and details of what to expect during hurricane season -- which runs through to 30 November -- check out Cruise Critic's Hurricane Zone.
--by Kelly Ranson, U.K. Editor