On August 21, Typhoon Cary passed just south of Hainan, where hundreds of homes were damaged but no fatalities occurred, and subsequently entered the Gulf of Tonkin.

The origins of Typhoon Cary can be traced back to an area of disturbed weather that first developed within the monsoon trough on August 6 about 370 km (230 mi) southwest of Pohnpei, which is located in the eastern Caroline Islands.

On August 12, upper-level outflow improved in all four quadrants, which resulted in the JTWC issuing a Tropical Cyclone Formation Alert (TCFA).

At 23:02 UTC, Hurricane Hunters measured flight level winds of 105 km/h (65 mph) and a minimum barometric pressure of 996 mbar (29.4 inHg).

[1] Following behind Typhoon Betty,[1] Cary initially moved north-northwest, only to turn west-northwest[5] under the influence of a subtropical ridge to the storm's north.

However, a Hurricane Hunter aircraft fix around midday on August 14 revealed that the storm was actually weakening and its center was becoming difficult to locate.

[6][nb 2] Around this time, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) also started tracking the storm and assigned it with the name Ising.

[2] The final Western Pacific Hurricane Hunter mission – associated with the 54th Weather Reconnaissance Squadron – was flown through Cary later that day, reporting winds of 115 km/h (70 mph) and a barometric pressure of 990 mbar (29 inHg).

[2] Shortly after attaining maximum intensity, Typhoon Cary turned slightly south of west[5] and made landfall on eastern Luzon.

Accelerating towards the west, Typhoon Cary emerged into the Gulf of Tonkin before making landfall at noon on August 12 in northern Vietnam.

[11] A total of 1,800 people were evacuated in the resort town of Baguio, which is located 160 km (100 mi) north of Manila,[12] due to landslides.

[16][nb 3] The typhoon passed close to Hainan Island on August 21, where hurricane-force winds and torrential rain resulted in the disruption of water and electrical services.

Throughout the coastal provinces of Thanh Hoa, Ha Nam Ninh, Thai Binh and Haiphong, floodwaters from the storm overflowed dikes.