On July 21, both the JMA and the JTWC reported that Tropical Depression 08W had developed approximately 582 km (361 mi) to the south of Hong Kong.
After moving westward for a couple of days, the system strengthened into a tropical storm by both agencies while nearing the island province of Hainan, receiving the name Sonca.
By July 24, Sonca reached its maximum intensity with a minimum pressure of 994 hPa.
Early on July 25, the JTWC issued its final advisory as the system made landfall over in Quảng Trị Province, Vietnam.
The JMA issued its final advisory a few hours later until it weakened into an area of low-pressure.
On July 21, both the JMA and the JTWC reported that Tropical Depression 08W had developed approximately 582 km (361 mi) to the south of Hong Kong. After moving westward for a couple of days, the system strengthened into a tropical storm by both agencies while nearing the island province of Hainan, receiving the name Sonca. By July 24, Sonca reached its maximum intensity with a minimum pressure of 994 hPa. Early on July 25, the JTWC issued its final advisory as the system made landfall over in Quảng Trị Province, Vietnam. The JMA issued its final advisory a few hours later until it weakened into an area of low-pressure.
Tropical Storm Sonca (2017)