Typhoon Ida (1958)
| Category 5 (Saffir–Simpson scale) | |
Typhoon Ida at peak intensity
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| Formed | September 20, 1958 |
|---|---|
| Dissipated | September 30, 1958 |
| (Extratropical after September 27, 1958) | |
| Highest winds |
1-minute sustained: 325 km/h (200 mph) |
| Lowest pressure | 877 hPa (mbar); 25.9 inHg |
| Fatalities | 1,269 total |
| Damage | $50 million (1958 USD) |
| Areas affected | Japan |
| Part of the 1958 Pacific typhoon season | |
Typhoon Ida, also known as the Kanogawa Typhoon (狩野川台風 Kanogawa Taifū?), was the third deadliest typhoon in Japan. On September 20, Ida formed in the Western Pacific near Guam. It moved to the west and rapidly intensified into a 115 mph (185 km/h) typhoon by the next day. On September 22, Ida turned to the north and continued its quick rate of intensification. Two days later, the Hurricane Hunters observed a minimum barometric pressure of 877 mb (25.9 inHg), as well as estimated peak winds of 325 km/h (200 mph). This made Ida the strongest tropical cyclone in the world at the time, although it was surpassed by Typhoon June 17 years later. Ida weakened as it continued to the north-northeast, and made landfall in Japan on southeastern Honshū with winds of 80 mph on September 26. It became extratropical the next day, and dissipated on the 28th to the east of the country. Ida caused torrential flooding to southeastern Japan, resulting in over 1,900 mudslides. Damage was estimated at $50 million, and there were 1,269 fatalities.
Tropical Storm Ida formed east of Guam on September 20, 1958. The storm moved westward, crossing the island as it gradually intensified into a typhoon. On September 22, Ida began a motion to the north, following a path typical of September typhoons. Around that time, the Hurricane Hunters reported that the eye was obscured, and over the subsequent 24 hours the eyewall remained incomplete. However, over a 14-hour period beginning at 1500 UTC on September 23, Typhoon Ida began undergoing rapid deepening, at times a rate of 5.8 mbar (0.17 inHg) per hour. The eye became increasingly well-defined, and near 0500 UTC on September 24, a reconnaissance aircraft deployed a dropsonde in the typhoon about 600 mi (970 km) northwest of Guam. The instrument recorded a barometric pressure of 877 mbar (25.9 inHg), which made Ida the strongest tropical cyclone on record at the time as measured by pressure.
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