The newly formed Tropical Cyclone HINNAMNOR is moving west-south-west over the north-west Pacific, towards Ryukyu Islands (southern Japan). On 31 August at 0.00 its centre was located about 230 km east of Okinawa Island, with maximum sustained winds of 250 km/h.

Evacuation orders have been issued for 1,747 people living in Okinawa Prefecture, as reported by the Japanese Fire and Disaster Management Agency (FDMA).

On 31 August - 1 September, HINNAMNOR is expected to move south-west, passing south of Ryukyu Islands, with maximum sustained winds between 215-240 km/h. After that, it is forecast to turn northwards, passing west of Taiwan and crossing southern Ryukyu Islands on 3-4 September. 

Emergency warnings for storm surge are in effect for Okinawa Prefecture, while red warnings for high wave have been issued for the rest of Ryuku Islands. On 31 August - 1 September heavy rainfall with strong winds and storm surge is forecast over Ryuku Islands.