The storm intensified significantly and re-curved northwestward in response to a weakening high-pressure area. Early on August 16, Rose attained its maximum sustained wind speed of 220 km/h (140 mph) – equivalent to a Category 4 hurricane on the National Hurricane Center's Saffir–Simpson hurricane wind scale. Later that day, a ship observed the typhoon's minimum barometric pressure of . Thereafter, the storm weakened slightly before making landfall at Lantau Island, Hong Kong, with winds of 165 km/h (105 mph) late on August 16. Rose rapidly weakened to a tropical storm early the following day and dissipated several hours later.