Typhoon 13 is forecast to make its closest approach to the Okinawa main island on Friday, Aug. 7 [1, 3].
The storm's proximity poses a severe threat to the region, with the potential for devastating wind damage and flooding that could disrupt critical infrastructure and endanger lives.
Weather officials report that the typhoon is currently passing through the waters east of Okinoerabu Island [1, 2, 4]. While sources differ on the exact timing of the closest approach, with reports ranging from Friday morning [2] to midday [1], the storm is expected to maintain its strength as it moves toward the Japanese archipelago [1, 2].
Maximum instantaneous wind speeds are expected to reach 55 m/s on Friday [1]. The Japan Meteorological Agency said that the Okinawa main island and the Amami region have already entered a storm zone with wind speeds of 25 m/s or higher [4]. This high-wind warning extends through Aug. 9 [1].
Beyond the wind, officials said heavy rain and the potential formation of linear rain bands are possible [1]. These weather patterns significantly increase the risk of landslides and flash flooding in the affected areas [1, 2, 4]. The storm's influence is already being felt further north, as wide areas of Kyushu, including Kumamoto, have entered a strong wind zone [4].
"13号は勢力を維持したまま７日午前に沖縄本島に最接近し、付近を通過する見込み," the Japan Meteorological Agency said via Jiji Press [2].
Local residents are advised to monitor updates closely and follow evacuation orders if issued. The combination of intense wind and concentrated rainfall creates a high-risk environment for those in coastal and mountainous terrain [1, 4].
“Maximum instantaneous wind speeds are expected to reach 55 m/s on Friday.”
The approach of Typhoon 13 highlights the vulnerability of the Ryukyu Islands to high-intensity summer storms. The forecast of linear rain bands is particularly concerning, as these concentrated corridors of precipitation often lead to rapid-onset flooding and landslides that outpace standard evacuation timelines. The fact that the storm's wind zone already extends to Kyushu suggests a large-scale weather system that may cause prolonged disruption across southern Japan.
