Ismael continued to grow , and on September 14 , it became a hurricane . Ismael steadily strengthened as it moved northward , though it failed to organize significantly ; early on September 14 the center remained poorly defined despite winds of 70 m. However , the outflow remained well-organized as it remained over warm waters . Ismael became better organized , and later on September 14 it intensified into a hurricane while located 210 miles ( 340 km ) west-southwest of Puerto Vallarta .