 While approaching southeastern China, Wanda reached its peak strength of with the JTWC estimating a minimum pressure of 949 mbar.The typhoon weakened slightly before making landfall on Hong Kong at 0000 UTC on September 1, with winds of 150 km/h (90 mph).A combination of cold air and land interaction caused Wanda to weaken rapidly, and the JTWC discontinued advisories about 18 hours after Wanda moved ashore.