Typhoon Vamco brought wind and rain to Vietnam on Saturday night. At 10:00 p.m. EST on Saturday the center of Typhoon Vamco was located at latitude 17.3°N and longitude 107.5°E which put it about 40 miles (65 km) east of Vinh Linh, Vietnam. Vamco was moving toward the northwest at 8 m.p.h. (13 km/h). The maximum sustained wind speed was 90 m.p.h. (145 km/h) and there were wind gusts to 115 m.p.h. (185 km/h). The minimum surface pressure was 979 mb.
The center of Typhoon Vamco was about to make landfall on the coast of Vietnam between Vinh Linh and Dong Hoi on Saturday night. Bands on the western side of Vamco were already bringing wind and rain to Vietnam. A flow of drier air from eastern Asia into the western part of the circulation around Vamco caused the typhoon to weaken as it approached Vietnam. Even though it was weaker, Typhoon Vamco was still capable of causing serious damage. Winds to typhoon force extended out 30 miles (50 km) from the center of Vamco. Winds to tropical storm force extended out 130 miles (210 km from the center.
Typhoon Vamco will bring strong winds to the coast of central Vietnam during the next few hours. Wind blowing water toward the coast will cause a storm surge north of Vinh Linh. The winds blwoing around Vamco will weaken when it moves inland. However, Typhoon Vamco will drop heavy rain over parts of central Vietnam, southern Laos and northeastern Thailand. Heavy rain will fall on saturated ground and significant flooding is likely to occur.
Tropical Storm Kajiki formed near the coast of Vietnam on Monday. At 5:00 p.m. EDT on Sunday the center of Tropical Storm Kajiki was located at latitude 16.6°N and longitude 107.6°E which put it about 50 miles (80 km) northeast of Vinh Linh, Vietnam. Kajiki was moving toward the southwest at 10 m.p.h. (16 km/h). The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h). The minimum surface pressure was 996 mb.
The wind speed around a low pressure system just east of the coast of Vietnam increased to 40 m.p.h. (65 km/h) on Monday and the Japan Meteorological Agency designated the system as Tropical Storm Kajiki. The distribution of thunderstorms around Kajiki was asymmetrical. Many of the stronger thunderstorms were occurring in bands in the western half of the circulation. Bands in the eastern half of Tropical Storm Kajiki contained fewer thunderstorms. Kajiki was moving south of an upper level ridge over eastern Asia. The ridge was producing northeasterly winds which were blowing toward the top of the tropical storm. Those winds were causing moderate vertical wind shear and they were the reason for the asymmetrical distribution of thunderstorms.
The upper level ridge will steer Tropical Storm Kajiki toward the southwest during the next 12 to 24 hours. On it anticipated track Kajiki will reach the coast of Vietnam within 12 hours. Even though Tropical Storm Kajiki will move over water where the Sea Surface Temperature is near 30°C, it will have only a few hours to strengthen before the center reaches the coast. Kajiki will bring some gusty winds to the coast, but the greater risk is for heavy rain. Tropical Storm Kajiki will drop locally heavy rain over parts of central Vietnam and northern Laos. Heavy rain could cause flash floods in some locations.
Elsewhere over the Western North Pacific Ocean, Tropical Storm Lingling was strengthening as it north toward the southern Ryukyu Islands. At 5:00 p.m. EDT on Sunday the center of Tropical Storm Lingling was located at latitude 19.5°N and longitude 124.1°E which put it about 565 miles (915 km) south-southwest of Okinawa. Lingling was moving toward the north-northwest at 13 m.p.h. (20 km/h). The maximum sustained wind speed was 50 m.p.h. (80 km/h) and there were wind gusts to 65 m.p.h. (105 km/h). The minimum surface pressure was 994 mb. Tropical Storm Lingling is forecast to strengthen into a typhoon before it reaches the southern Ryukyu Islands.