 Hurricane Henri developed as Tropical Depression Eighteen in the extreme northwestern Caribbean Sea on September 14 from a tropical wave , which had previously moved off the coast of Africa . The formation of a tropical depression was confirmed by reports from Hurricane Hunters . The depression tracked northward , brushing the eastern portion of the Yucatán Peninsula . After reaching the Gulf of Mexico it turned sharply westward , with a ridge preventing further northward movement . The depression turned southwestward , and intensified into Tropical Storm Henri on September 16 . 
