Tropical Storm Talas (2011)
| Severe tropical storm (JMA scale) | |
|---|---|
| Tropical storm (Saffir–Simpson scale) | |
Severe Tropical Storm Talas approaching Japan on September 1, 2011.
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| Formed | August 23, 2011 |
| Dissipated | September 7, 2011 |
| (Extratropical after September 5) | |
| Highest winds |
10-minute sustained: 95 km/h (60 mph) 1-minute sustained: 100 km/h (65 mph) |
| Lowest pressure | 970 hPa (mbar); 28.64 inHg |
| Fatalities | 82 confirmed, 16 missing |
| Damage | $600 million (2011 USD) |
| Areas affected | Japan |
| Part of the 2011 Pacific typhoon season | |
Severe Tropical Storm Talas (formerly called Typhoon Talas), was an unusually large tropical cyclone that caused many deaths and severe damage to Japan. It was the 12th named storm and the 7th severe tropical storm of the 2011 Pacific typhoon season. Talas is known to have killed at least 73 people, and 20 more are still missing. The word Talas is a Filipino word meaning sharpness. It followed five months after Japan was hit by a large tsunami.
Throughout Japan, Talas brought heavy rainfall leaving roads flooded. Extremely heavy rainfall of 66.5 millimeters per hour was observed, with rainfall of 69.0 mm in Yamanakako, Yamanashi, and 49.5 mm in Ichinoseki, Iwate which exceeded overall records for the entire month of September. Some 3,200 people were evacuated in 16 prefectures after extremely heavy rain. Some 700 houses were completely inundated by floods in eastern and western Japan and about 9,500 households in nine prefectures across the nation suffered power outages. More than 400 flights were cancelled leaving approximately 34,000 stranded.
In post-analysis, the Japan Meteorological Agency (JMA) downgraded Talas from a minimal typhoon to a minimal severe tropical storm.
Late on August 22, an area of low pressure developed to the west of Guam. At midnight that day, the system became sufficiently well organized that the Japan Meteorological Agency (JMA) started tracking it as a tropical depression. On August 23, the system moved into an environment of low wind shear and warm sea surface temperatures prompting the JTWC to issue a Tropical Cyclone Formation Alert (TCFA) on it. By August 25, the system grew strong enough that the JMA upgraded it to a tropical storm, naming it Talas. Soon the system developed long and expansive convective banding along the eastern and south-western periphery of the broad low level circulation center, similar to a monsoonal depression. The JTWC initiated advisories on the system, designating it with 15W. The JTWC originally anticipated a fujiwhara effect of Typhoon Nanmadol, a stronger tropical cyclone to the west of Talas.
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