Ruby was the fourth tropical cyclone to enter the vicinity of Hong Kong in 1964, a year that featured a record amount of storms tracking near the Crown territory. It was the most severe storm to hit Hong Kong since Typhoon Wanda in 1962.: Gale-force winds associated with Ruby reached Hong Kong on the morning of September 5 and continued to impact the Crown territory until the following night. The Royal Observatory headquarters measured a minimum air pressure of 968.2 hPa (mbar; 28.59 inHg) when the centre of the typhoon was roughly 30 km (15 mi) to the southwest. At Tate's Cairn, a wind gust of 268 km/h (166 mph) was registered; other measured peak gusts included 227 km/h (141 mph) at the Royal Observatory and 203 km/h (126 mph) at Kai Tak Airport. A 230 km/h (143 mph) gust on Waglan Island was the fastest observed in the island's history. Rainfall accumulations in Hong Kong reached at least 175 mm (7 in) in 24 hours.: The Royal Observatory recorded at least (165 mm) 6.50 in of rain from the storm. Ruby produced a maximum storm surge height of at Quarry Bay.