 A tropical wave move off the coast of Africa on September 5 , and crossed the Atlantic waters , the Caribbean Sea and eventually into the Pacific Ocean as a weak system . An area of convection entered into the northeastern Pacific Ocean a few hundred miles south of Acapulco , Mexico . On September 2 , Tropical Depression Nineteen @-@ E formed from this convection , while 746 mi ( 1 @,@ 201 km ) south @-@ southeast from the southern tip of Baja California . The depression moved on a west @-@ northwestward track , rounding the southwest side of a strong high pressure system . The depression continued to strengthen and was upgraded to Tropical Storm Odile on September 24 and into a hurricane on September 25 . Its intensity peaked with maximum sustained winds of 145 mph ( 233 km / h ) on September 26 . 
