High Quality Content by WIKIPEDIA articles! Tropical Storm Etau (International designation: 0909, JTWC designation: 10W) was the deadliest tropical cyclone to impact Japan since Typhoon Tokage in 2004. Forming on August 8 from an area of low pressure, the system gradually intensified into a tropical storm. Tracking in a curved path around the edge of a subtropical ridge, Etau continued to intensify as it neared Japan. By August 11, the cyclone reached its peak intensity as a with winds of 75 km/h (45 mph 10-minute sustained) and a barometric pressure of 992 hPa (mbar). Shortly after, Etau began to weaken and was downgraded to a tropical storm early on August 11. Increasing wind shear led to the center becoming devoid of convection and the system eventually weakened to a tropical depression on August 13. The remnants of Etau persisted for nearly day before dissipating early on August 14.