TS Ernesto is moving west toward the Carribbean and the Gulf; it may become a cat 1 hurricane Monday. This all, of course, is subject to change.
Update (8-5): TS Ernesto is still heading west, but it may not make it to a hurricane, and it looks like its projected path is further south now--and most of the computer models agree.
Update (8-6): TS Ernesto is heading WNW and may become a category 1 before making landfall in Mexico Tuesday.
Update (8-8): Ernesto made landfall as a hurricane and is now over water again and should become a hurricane before making landfall in Mexico again. It's still moving west.