In addition, the normal summer southerly wind changes, first to a northeasterly and then to a northerly. Ocean waves become longer than usual.
除了天色外，夏季原吹南風，但颱風為反時針方向旋轉的氣旋，所以在它正式蒞臨前，先頭部隊﹘﹘東北風，然後轉成北風已前來示警，而且此時海上會起長浪。