Powerful winds and rain expected in parts of Japan and Australia, while temperatures in Spain could hit 40C A powerful tropical storm is forecast to track near Okinawa, Japan, on Monday before moving towards the south-east of the country. Typhoon Jangmi (also known as Typhoon No 6) has formed within the monsoonal gyre over the Philippine Sea. A monsoonal gyre is a large, slow-rotating weather system that spawns typhoons through smaller vortices formed within it. This flow can intensify storms. S