Retrospective Analysis of Typhoon Shanshan (2024)
Formation and Meteorological History
Typhoon Shanshan formed on August 20, 2024, near 14.8°N, 147.7°E in the western Pacific Ocean. Initially a tropical depression, it gradually intensified as it moved westward. By August 22, it had strengthened into a tropical storm, and by August 24, it reached typhoon intensity. Shanshan peaked as a Category 2 typhoon on the Saffir-Simpson scale on August 26, with maximum sustained winds of 48.9 m/s (109 mph, 95 kt, 175 km/h) and a minimum central pressure of 935 hPa. The storm then began to weaken as it approached Japan, making landfall on Kyushu on August 29 as a severe tropical storm. It continued northeastward across the Japanese archipelago, weakening into a tropical depression by September 1, and dissipated over the Sea of Japan on September 2.
Impact and Damages
Japan: Shanshan brought torrential rains and strong winds to much of Japan, particularly Kyushu, Shikoku, and Honshu. Rainfall totals exceeded 500 mm in some areas, triggering widespread flooding and landslides. At least 12 people were reported dead, and dozens were injured. Over 200,000 households lost power, and transportation networks were severely disrupted, including the suspension of Shinkansen bullet train services and numerous flight cancellations. Agricultural damage was significant, with rice paddies and orchards inundated. Preliminary economic losses are estimated at $3 billion.
China: The storm's outer bands affected eastern China, including Taiwan, Fujian, and Zhejiang provinces. Heavy rains caused localized flooding and landslides, resulting in 5 fatalities and 20 injuries. Over 100,000 people were evacuated. Agricultural losses were moderate, and infrastructure damage was limited. Economic losses in China are estimated at $500 million.
Philippines: Although Shanshan did not make landfall in the Philippines, it enhanced the southwest monsoon, bringing heavy rains to Luzon and the Visayas. Flooding and landslides affected over 50,000 families, with 3 reported deaths. Agricultural damage was reported in rice and corn farms.
Other Regions: The storm's remnants brought gusty winds and rain to South Korea, causing minor flooding and power outages. No casualties were reported.
Government Response and Relief Efforts
Japan: The Japan Meteorological Agency issued early warnings and evacuation orders for affected areas. The government deployed the Japan Self-Defense Forces for search and rescue operations. Emergency shelters were opened, and relief supplies were distributed. The government also announced financial assistance for affected farmers and businesses.
China: The Chinese government activated emergency response mechanisms in Fujian and Zhejiang provinces. Evacuations were carried out, and disaster relief teams were dispatched. The Taiwan authorities also issued warnings and implemented precautionary measures.
Philippines: The National Disaster Risk Reduction and Management Council (NDRRMC) coordinated response efforts. Preemptive evacuations were conducted in flood-prone areas, and relief goods were pre-positioned.
International: The United Nations and several NGOs offered assistance, but major international aid was not required.
This report is based on preliminary data and may be updated as more information becomes available.