Hurricane Dean, after dealing a glancing blow to Jamaica yesterday and the Caymans today will continue west through the Caribbean. It is very likely that it will become a Category 5 storm before it makes landfall again along the eastern Yucatan Peninsula in Mexico. The very popular resort destination of Cancun is in this area. The water is incredibly warm in this area of the Caribbean and atmospheric conditions are very good for Dean to strengthen.
The good news is for the United States. Dean is forecast to stay south, and once it crosses the Yucatan will continue west into mainland Mexico. Dean will be held south by a building area of high pressure to the north of the system.