Rating Hurricanes: The Saffir-Simpson Scale

Tropical Storm Nate has is gaining strength over the warm water of the northwest Caribbean Sea, poised for a strike on Cancún and Cozumel tonight, then on the northern Gulf Coast Saturday night and Sunday, where hurricane warnings have now been posted.

(MORE: Hurricane Central)

This is a developing weather story, for the latest forecast on Nate, including expected impacts along the U.S. Gulf Coast, check out our latest forecast article here.