The origins of Typhoon Ida were associated with the interaction between a polar trough and a tropical wave, which resulted in the development of a tropical disturbance south of Chuuk State on August 1. The disturbance became a tropical depression roughly (300 mi) southeast of Guam on August 2 and strengthened into a tropical storm later that day. Tracking towards the west-northwest, Ida reached typhoon intensity on August 4. According to the JTWC, Ida reached its peak intensity with maximum winds of 250 km/h (155 mph) and a central pressure of 925 hPa (mbar; 27.31 inHg). Between August 6–7, Ida moved across northern Luzon with these winds. The storm weakened over the island but restrengthened over the South China Sea on approach to Hong Kong. The center of the storm passed 65 km (40 mi) southwest of Hong Kong and made its final landfall on Guangdong Province China on August 8 as a typhoon with winds of 150 km/h (90 mph) as estimated by Royal Observatory Hong Kong. As it tracked farther inland, Ida weakened and later dissipated on August 12.