A tropical depression is judged to have intensified into a tropical cyclone if winds reach 65 km\/h , ( 40 mph ) and it is clear that gales are occurring more than halfway around the center . A tropical low or a tropical depression will be judged to have intensified into a tropical cyclone if winds reach 65 km\/h , ( 40 mph ) and it is evident that gales are occurring more than halfway around the center .