Typhoon Ida (1958)
|Category 5 (Saffir–Simpson scale)|
|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|
|Damage||$50 million (1958 USD)|
|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.
Around the time of its lowest pressure, the Hurricane Hunters estimated sustained winds in Ida of 345 km/h (215 mph). The reconnaissance flight observed a surface temperature in the eye of 33 °C (92 °F) with 50% humidity; such a warm and dry eye was rather unusual for being located over the open ocean. By less than 36 hours after its peak intensity, aircraft reported that the eye had become filled with clouds, which indicated weakening. Ida's winds gradually decreased, and the typhoon struck Japan in southeastern Honshu on September 26 with winds of 190 km/h (120 mph) and a minimum pressure of 949 millibars (28.0 inHg). The typhoon crossed the eastern portion of the country and emerged from Fukushima Prefecture into the Pacific Ocean. Early on September 27, Ida became extratropical, and its remnants moved through Sapporo and the Kuril Islands before dissipating late on September 28.
When the Hurricane Hunters reported Ida's lowest pressure, the measurement was 10 mb (0.30 inHg) lower than the previous record of 887 mbar (26.2 inHg), set by a typhoon in 1927. Ida retained its status as the most intense typhoon until 1973, when Typhoon Nora attained the same minimum pressure. In November 1975, Typhoon June surpassed both and attained a minimum pressure of 875 mbar (25.8 inHg). Typhoon Tip in October 1979 became the strongest on record with a minimum pressure of 870 mbar (26 inHg), which remains the record.
|Nancy||T6118||2nd Muroto Typhoon|
|Cora||T6618||2nd Miyakojima Typhoon|
|Della||T6816||3rd Miyakojima Typhoon|
While Typhoon Ida was striking Japan, it produced heavy rainfall that reached 748.6 mm (29.47 in) on Mount Amagi on the Izu Peninsula. In the capital city of Tokyo, the storm dropped almost 430 mm (17 in) of rainfall, which was the highest daily total since record-keeping began in 1876. Across the country, the rains caused flooding along the Kano, Merugo, and Arakawa rivers; the flooding of the Kano River destroyed to villages along the Izu Peninsula. The rains resulted in at least 1,900 landslides, including 786 in the Tokyo area. There was a storm tide of 1.1 m (3.6 ft) in Chiba, which flooded 120,000 acres of rice fields. Along the coast, there were 32 ships that were missing or sunk, and another 20 were damaged. In addition to the rains, the typhoon produced winds of up to 160 km/h (100 mph), with gusts of 130 km/h (80 mph) recorded in Tokyo; however, wind damage was minor.
A report by Time Magazine in early October 1958 referred to Ida as the worst Japanese typhoon in 24 years, since the 1934 Maruto typhoon. In the Tokyo area, the storm caused widespread power outages and severely disrupted the transportation system. During the storm, communications were severed with the Izu Peninsula, where damage was heaviest. Across the country, more than 520,000 homes were flooded, which is the most on record. As a result, the Japan Meteorological Agency gave Ida the special local name of the "Kanogawa Typhoon". The typhoon damaged 16,743 homes to some degree, including 2,118 that were destroyed and another 2,175 that were severely damaged. Although it was initially reported that the storm left about 500,000 people homeless, the total was later lowered to 12,000 people left homeless due to the storm. In addition, the typhoon destroyed more than 244 road or rail bridges. Overall damage was estimated at $50 million (1958 USD), or 20.6 billion yen. Overall, the typhoon injured 1,138 people and killed a total of 1,269 people; this makes Ida the third deadliest storm in the country. Included in the death toll were 381 people that were missing and presumed killed.
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