Tag Archives: Hainan

Tropical Storm Sanba Drops Heavy Rain on Southern China

Tropical Storm Sanba dropped heavy rain on parts of southern China on Thursday. At 5:00 p.m. EDT on Thursday the center of Tropical Storm Sanba was located at latitude 21.3°N and longitude 109.2°E which put it about 25 miles (40 km) southeast of Beihai China. Sanba was moving toward the north-northeast at 8 m.p.h. (13 km/h). The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (95 km/h). The minimum surface pressure was 1001 mb.

Tropical Storm Sanba dropped heavy rain on parts of Guangxi and Guangdong in southern China on Thursday. The center of Sanba’s circulation was still over the northeastern Gulf of Tonkin. Much of the northern half of Tropical Storm Sanba was over southern China. Part of the eastern side of Sanba’s circulation was over Hainan. Winds to tropical storm force extended out 60 miles (95 km) from the center of Tropical Storm Sanba.

An upper level trough over eastern Asia and an upper level ridge centered north of the Philippines were interacting to produce southwesterly winds that were blowing toward the top of Sanba’s circulation. Those winds were causing moderate vertical wind shear and they were also causing the distribution of thunderstorms to be asymmetrical. Thunderstorms were occurring in bands in the northern and eastern parts of Tropical Storm Sanba. Bands in the southern and western parts of Sanba’s circulation consisted primarily of showers and lower clouds.

Tropical Storm Sanba will be in an environment that is mostly unfavorable for intensification during the next 24 hours. Sanba will move over water where the Sea Surface Temperatures are near 28°C. The upper level trough over eastern Asia and the upper level ridge north of the Philippines will continue to cause moderate vertical wind shear. Almost half of Sanba’s circulation will be over land and increased friction will slow the wind in those areas. Tropical Storm Sanba is likely to weaken during the next 24 hours even if the center of circulation does not move over southern China.

The movement of Tropical Storm Sanba during the next 24 hours will depend on how strong the vertical wind shear is. If the wind shear is moderate and the upper and lower parts of Sanba’s circulation remain connected, then southwesterly winds will steer Tropical Storm Sanba toward the north-northeast. If Sanba moves north-northeast it will move inland over southern China. If the vertical wind shear gets stronger, then the upper level winds will push the top part of Sanba’s circulation toward the north-northeast. If the wind shear rips the top off of Tropical Storm Sanba, then the lower part of the circulation could meander over the northeastern Gulf of Tonkin during the next 24 hours.

Tropical Storm Sanba will continue to drop heavy rain over southern China during the next 24 hours. Heavy rain will fall on parts of Guangxi and Guangdong. Prolonged heavy rain will cause floods in some locations.

Tropical Storm Sanba Forms East of Vietnam

Tropical Storm Sanba formed over the Gulf of Tonkin east of Vietnam on Wednesday. At 11:00 a.m. EDT on Wednesday the center of Tropical Storm Sanba was located at latitude 18.9°N and longitude 108.2°E which put it about 180 miles (280 km) southeast of Haiphong, Vietnam. Sanba was moving toward the northwest at 9 m.p.h. (15 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 1003 mb.

A low pressure system over the Gulf of Tonkin east of Vietnam strengthened on Wednesday and the Japan Meteorological Agency designated the system as Tropical Storm Sanba. The distribution of thunderstorms in Tropical Storm Sanba was asymmetrical. Many of the thunderstorms were occurring in bands in the eastern side of Sanba’s circulation. Bands in the western part of Tropical Storm Sanba consisted primarily of showers and lower clouds. Storms near the center of Sanba’s circulation generated upper level divergence that pumped mass away to the west and north of the tropical storm. Winds to tropical storm force extended out 50 miles (80 km) in the eastern side of Tropical Storm Sanba. The winds in the western part of Sanba’s circulation were blowing at less than tropical storm force.

Tropical Storm Sanba will move through an environment somewhat favorable for intensification during the next 24 hours. Sanba will move over water where the Sea Surface Temperatures are near 28°C. It will move under the western part of an upper level ridge centered northwest of the Philippines. The upper level ridge will produce southeasterly winds that will blow toward the top of Sanba’s circulation. Those winds will cause some vertical wind shear but the wind shear will not be strong enough to prevent intensification. Some of the air circulating around the eastern side of Tropical Storm Sanba will flow over Hainan. The additional friction caused by the land will cause the air in that part of Sanba’s circulation to slow down. Tropical Storm Sanba could intensify gradually during the next 24 hours.

Tropical Storm Sanba will move around the western part of a high pressure system over the Western North Pacific Ocean. The high pressure system will steer Sanba toward the north-northwest during the next 24 hours. On its anticipated track the center of Tropical Cyclone Sanba will pass west of Hainan. Sanba will move toward northeastern Vietnam.

Bands in the eastern side of Tropical Storm Sanba are already producing gusty winds and locally heavy rain in parts of Hainan. Bands in the western side of Sanba’s circulation are bringing rain showers to parts of northern Vietnam. Tropical Storm Sanba will continue to produce gusty winds and locally heavy rain in parts of Hainan and northern Vietnam. Heavy rain could cause flash floods in some locations.

Typhoon Talim Brings Wind and Rain to Southern China

Typhoon Talim brought wind and rain to southern China on Monday. At 11:00 a.m. EDT on Monday the center of Typhoon Talim was located at latitude 21.3°N and longitude 110.5°E which put it about 10 miles (15 km) east of Zhanjiang, China. Talim was moving toward the west-northwest at 14 m.p.h. (22 km/h). The maximum sustained wind speed was 75 m.p.h. (120 km/h) and there were wind gusts to 90 m.p.h. (145 km/h). The minimum surface pressure was 973 mb.

The center of Typhoon Talim made landfall on the south coast of China near Zhanjiang on Monday. The size of the circulation around Typhoon Talim increased as it approached the coast. Winds to typhoon force extended out 65 miles (105 km) from the center of Talim’s circulation. Winds to tropical storm force extended out 155 miles (250 km) from the center of circulation.

The eye of Typhoon Talim was on the coast of southern China near Zhanjiang. The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that ring of storms. Bands of showers and thunderstorms were dropping heavy rain over parts of Guangdong, Guangxi and Hainan. Heavy rain could cause flash floods in some locations. Winds blowing around the northern side of Typhoon Talim were pushing water toward the coast and the winds were generating a storm surge of up to seven feet (two meters).

Typhoon Talim will move around the southwestern part of a subtropical high pressure system over the Western North Pacific Ocean. The high pressure system will steer Talim toward the west-northwest during the next 36 hours. On its anticipated track, Typhoon Talim will move inland over southern China. Typhoon Talim will continue to bring strong winds and locally heavy rain to southern China during the next 36 hours. Talim will produce strong winds and heavy rain in southwestern Guangdong, Guangxi and Hainan. Locally heavy rain could cause flash floods in some locations. Talim will also bring gusty winds and locally heavy rain to parts of northern Vietnam when it moves farther west.

Talim Strengthens to a Typhoon South of Hong Kong

Former Tropical Storm Talim strengthened to a typhoon south of Hong Kong on Sunday. At 5:00 p.m. EDT on Sunday the center of Typhoon Talim was located at latitude 19.8°N and longitude 113.7°E which put it about 180 miles (290 km) south of Hong Kong. Talim was moving toward the west-northwest at 8 m.p.h. (13 km/h). The maximum sustained wind speed was 75 m.p.h. (120 km/h) and there were wind gusts to 90 m.p.h. (145 km/h). The minimum surface pressure was 975 mb.

Former Tropical Storm Talim strengthened steadily during the weekend and Talim reached typhoon intensity on Sunday. The inner end of a rainband wrapped around the center of Typhoon Talim’s circulation. An eye was evident on conventional and microwave satellite images. The eye was surrounded by a broken ring of thunderstorms and the strongest winds were occurring in the ring of storms. Bands of showers and thunderstorms revolved around the core of Typhoon Talim. Storms near the core generated upper level divergence that pumped mass away from the typhoon. Winds to typhoon force extended out 20 miles (30 km) in the northern side of Talim’s circulation. Winds to tropical storm force extended out 140 miles (220 km) from the center of Talim.

Typhoon Talim will move through an environment favorable for intensification during the next 24 hours. Talim will move over water where the Sea Surface Temperatures are near 30˚C. It will move under the southern side of an upper level ridge that extends from the Western North Pacific Ocean to China. The ridge will produce easterly winds that will blow toward the top of Talim’s circulation. Those winds will cause some vertical wind shear but the wind shear will not be enough to prevent intensification. Typhoon Talim will intensify during the next 24 hours.

Typhoon Talim will move around the southwestern part of a subtropical high pressure system over the Western North Pacific Ocean. The high pressure system will steer Talim toward the west-northwest during the next 24 hours. On its anticipated track, the center of Typhoon Talim will make landfall on the coast of south China near Zhanjiang and Leizhou in 24 hours. Typhoon Talim will bring strong winds and locally heavy rain to southern China. Talim will bring strong winds and heavy rain to Guangdong, Guangxi and Hainan. Locally heavy rain could cause flash floods in some locations. Typhoon Talim could cause a storm surge of up to 7 feet (2 meters) along the coast of southern China. Talim will also bring gusty winds and locally heavy rain to parts of northern Vietnam early next week.

Tropical Storm Nesat Drops Rain on Hainan

Tropical Storm Nesat dropped rain on Hainan on Tuesday night. At 11:00 p.m. EDT on Tuesday the center of Tropical Storm Nesat was located at latitude 17.0°N and longitude 110.5°E which put it about 100 miles (160 km) south-southeast of Lingshui China. Nesat was moving toward the west at 12 m.p.h. (19 km/h). The maximum sustained wind speed was 65 m.p.h. (105 km/h) and there were wind gusts to 80 m.p.h. (130 km/h). The minimum surface pressure was 988 mb.

Former Typhoon Nesat weakened to a tropical storm on Tuesday as it moved over the South China Sea southeast of Hainan. An upper level ridge over China produced easterly winds that blew toward the top of Nesat’s circulation. Those winds caused moderate vertical wind shear and the wind shear caused an asymmetrical distribution of thunderstorms around Tropical Storm Nesat. Most of the thunderstorms were occurring in the northwestern part of Nesat. Those thunderstorms dropped heavy rain over Hainan and parts of southern China. Winds to tropical storm force extended out 200 miles (320 km) from the center of Nesat.

Tropical Storm Nesat will move through an environment unfavorable for intensification during the next 48 hours. Nesat will move over water where the Sea Surface Temperatures are near 29˚C. It will continue to move under the southern part of the over China. The ridge will produce easterly winds that will cause moderate vertical wind shear and the wind shear will inhibit intensification. A surface high pressure system over southern China will produce northeasterly winds that will transport drier air into the northern and western parts of Tropical Storm Nesat. The vertical wind shear and the drier air will cause Tropical Storm Nesat to continue to weaken during the next 48 hours.

The surface high pressure system over southern China will steer Tropical Storm Nesat toward the west during the next 48 hours. On its anticipated track, the center of Tropical Storm Nesat will pass south of Hainan during the next 24 hours. Nesat could approach the coast of Vietnam in 36 hours. Bands on the northern side of Tropical Storm Nesat will drop locally heavy rain on parts of Hainan, southern China and northern Vietnam. Heavy rain could cause flash floods in some locations.

Typhoon Nesat Passes South of Hong Kong

Typhoon Nesat passed south of Hong Kong as it moved across the South China Sea on Monday night. At 11:00 p.m. EDT on Monday the center of Typhoon Nesat was located at latitude 18.0°N and longitude 113.3°E which put it about 285 miles (460 km) south of Hong Kong. Nesat was moving toward the west-southwest at 12 m.p.h. (19 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 971 mb.

Typhoon Nesat started to weaken on Monday night as it passed south of Hong Kong. A circular eye was still present at the center of Nesat’s circulation. However a break occurred in the southeastern part of the ring of thunderstorms surrounded the eye of Typhoon Nesat. The strongest winds were occurring in the broken ring of thunderstorms. Bands of showers and thunderstorms were occurring in the western half of Nesat. Bands in the eastern side of the circulation consisted primarily of showers and lower clouds. Storms near the center of Nesat generated upper level divergence that pumped mass away to the west of the typhoon.

The circulation around Typhoon Nesat interacted with a large surface high pressure system over southern China to produce a large area of tropical storm force winds in the northern part of Nesat’s circulation. Winds to tropical storm force extended out 400 miles (640 km) in the northern side of Typhoon Nesat. Winds to tropical storm force extended out 120 miles (195 km) in the southern side of Nesat. Winds to typhoon force extended out 40 miles (65 km) from the center of circulation.

Typhoon Nesat will move through an environment unfavorable for intensification during the next 48 hours. Nesat will move over water where the Sea Surface Temperatures are near 29˚C. It will move under the southern part of an upper level ridge that extends over the Western North Pacific Ocean to southern China. The ridge will produce easterly winds that will cause moderate vertical wind shear and the wind shear will inhibit intensification. The surface high pressure system over southern China will produce northeasterly winds that will transport drier air into the northern and western parts of Typhoon Nesat. The vertical wind shear and the drier air will cause Typhoon Nesat to weaken during the next 48 hours.

The surface high pressure system over southern China will steer Typhoon Nesat toward the west during the next 48 hours. On its anticipated track, Typhoon Nesat will pass south of Hainan in 36 hours. Nesat is likely to weaken to a tropical storm by the time it passes south of Hainan. Nesat could bring gusty winds and locally heavy rain to Hainan on Tuesday night and Wednesday.

Chaba Strengthens to a Typhoon Northeast of Hainan

Former Tropical Storm Chaba strengthened to a typhoon northeast of Hainan Island on Friday afternoon. At 5:00 p.m. EDT on Friday the center of Typhoon Chaba was located at latitude 20.4°N and longitude 111.8°E which put it about 100 miles (160 km) southeast of Wuchuan, China. Chaba was moving toward the northwest at 12 m.p.h. (19 km/h). The maximum sustained wind speed was 75 m.p.h. (120 km/h) and and there were wind gusts to 90 m.p.h. (145 km/h). The minimum surface pressure was 981 mb.

Former Tropical Storm Chaba strengthened to a typhoon over the warm water in the northern South China Sea on Friday afternoon. The inner end of a rainband wrapped around the center of Typhoon Chaba’s circulation and the strongest winds were occurring in a ring around the center. Bands of showers and thunderstorms were revolving around the core of Typhoon Chaba. Storms near the core generated upper level divergence that pumped mass away from the typhoon. Winds to typhoon force extended out 60 miles (95 km) from the center of Chaba. Winds to tropical storm force extended out 180 miles (290 km) from the center of circulation.

Typhoon Chaba will move through an environment favorable for intensification during the next 12 hours. Chaba will move over water where the Sea Surface Temperatures are near 29˚C. It will move under the middle of an upper level ridge over the northern part of the South China Sea. The upper level winds are weak near the center of the ridge and there will be little vertical wind shear. Typhoon Chaba could continue to intensify during the next 12 hours.

Typhoon Chaba will move around the western end of a high pressure system over the Western North Pacific Ocean during the next 24 hours. The high will steer Chaba toward the northwest. On its anticipated track the center of Typhoon Chaba could make landfall on the coast of southern China near Wuchuan in 12 hours. Chaba will bring strong winds and locally heavy rain to southwestern Guangdong. Heavy rain is likely to cause flash floods in some locations.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Aere intensified gradually southeast of Okinawa. At 5:00 p.m. EDT on Friday the center of Tropical Storm Aere was located at latitude 23.6°N and longitude 130.4°E which put it about 305 miles (495 km) southeast of Okinawa. Aere was moving toward the north-northwest at 12 m.p.h. (19 km/h). The maximum sustained wind speed was 50 m.p.h. (80 km/h) and and there were wind gusts to 65 m.p.h. (105 km/h). The minimum surface pressure was 994 mb. Tropical Storm Aere is forecast to move toward the north-northwest and to continue to strengthen gradually. Aere could be near Okinawa in 18 hours.

Typhoon Rai Brings Gusty Winds and Rain to Central Vietnam

Typhoon Rai brought gusty winds and rain to central Vietnam on Sunday. At 10:00 a.m. EST on Sunday the center of Typhoon Rai was located at latitude 15.5°N and longitude 110.8°E which put it about 185 miles (295 km) east-southeast of Da Nang, Vietnam. Rai was moving toward the north at 11 m.p.h. (17 km/h). The maximum sustained wind speed was 120 m.p.h. (195 km/h) and there were wind gusts to 150 m.p.h. (240 km/h). The minimum surface pressure was 951 mb.

Bands in the western side of Typhoon Rai brought gusty winds and locally heavy rain to central Vietnam on Sunday. Although the core of Typhoon Rai was east of Vietnam, the large size of the circulation resulted in rainbands in the western side of the typhoon moving over central Vietnam. The core of Rai’s circulation where the strongest winds were located remained east of the coast of Vietnam.

Typhoon Rai was weakening over the South China Sea on Sunday. An upper level ridge over the Western North Pacific Ocean was producing southerly winds that were blowing toward the top of Rai’s circulation. A surface high pressure system over Asia was producing northeasterly winds in the lower levels of the atmosphere. The combination of southerly winds in the upper levels and northeasterly winds in the lower levels was causing moderate vertical wind shear. In addition, the northeasterly winds in the lower levels were transporting drier air toward Typhoon Rai.

Some of the drier air was wrapping around the southern side of Typhoon Rai. The strongest thunderstorms were occurring in bands in the western half of Rai’s circulation. Bands in the eastern half of the typhoon consisted primarily of showers and lower clouds. A broken ring of thunderstorms surrounded the eye of Typhoon Rai and the strongest winds were occurring in that ring of storms.

Winds to typhoon force extended out 65 miles (105 km) from the center of Typhoon Rai. Winds to tropical storm force extended out 185 miles (295 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Rai was 22.1. The Hurricane Size Index (HSI) was 20.6 and the Hurricane Wind intensity Size Index (HWISI) was 42.7. Rai was capable of causing regional major damage.

Typhoon Rai will move through an environment that will become unfavorable for intensification during the next 36 hours. Rai will move over water where the Sea Surface Temperatures are near 28˚C. However, the upper level ridge and the surface high pressure system will continue to cause moderate vertical wind shear. More dry air will be pulled into Rai’s circulation. Typhoon Rai will continue to weaken during the next 36 hours.

Typhoon Rai will move around the western end of a surface high pressure system over the Western North Pacific Ocean during the next 24 hours. The high pressure system will steer Rai toward the north. On its anticipated track the core of Typhoon Rai will remain east of Vietnam. Bands in the western side of Rai’s circulation will continue to produce gusty winds and locally heavy rain along the coast of Vietnam. The center of Rai could be southeast of Hainan in 18 hours.

Tropical Storm Kompasu Brings Wind and Rain to Hainan

Tropical Storm Kompasu brought wind and rain to Hainan on Wednesday. At 5:00 a.m. EDT on Wednesday the center of Tropical Storm Kompasu was located at latitude 19.2°N and longitude 110.0°E which put it about 50 miles (80 km) southwest of Haikou, China. Kompasu was moving toward the west at 22 m.p.h. (35 km/h). The maximum sustained wind speed was 65 m.p.h. (105 km/h) and there were wind gusts to 80 m.p.h. (130 km/h). The minimum surface pressure was 981 mb.

Tropical Storm Kompasu brought wind and rain as it moved over Hainan on Wednesday. The strongest thunderstorms were in bands on the western side of Kompasu’s circulation. Bands on the eastern side of the circulation consisted primarily of showers and lower clouds. Winds to tropical storm force extended out 200 miles (320 km) from the center of Tropical Storm Kompasu.

Tropical Storm Kompasu was moving under the southern part of an upper level ridge over China. The ridge was producing strong easterly winds that were blowing toward the top of Kompasu’s circulation. Those winds were causing moderate vertical wind shear. The flow around the northern side of Tropical Storm Kompasu was pulling drier air from Asia into the circulation. The combination of moderate vertical wind shear and drier air was causing the stronger thunderstorms to be on the western side of Kompasu.

Tropical Storm Kompasu will move around the southern side of a high pressure system over China. The high pressure system will steer Kompasu quickly toward the west during the next 24 hours. On its anticipated track the center of Kompasu will move quickly across the Gulf of Tonkin. Tropical Storm Kompasu will reach the coast of northern Vietnam in 18 hours. Gusty winds and rain will reach the coast before the center arrives because the stronger thunderstorms are on the western side of Kompasu. Vertical wind shear and drier air will prevent intensification of Tropical Storm Kompasu. Kompasu will bring gusty winds and locally heavy rain to northern Vietnam and Laos. Locally heavy rain could cause flash floods in some locations.

Tropical Storm Kompasu Brings Wind and Rain to Northern Luzon

Tropical Storm Kompasu brought wind and rain to northern Luzon on Monday. At 11:00 a.m. EDT on Monday the center of Tropical Storm Kompasu was located at latitude 18.9°N and longitude 120.9°E which put it about 35 miles (55 km) north of Claveria, Philippines. Kompasu was moving toward the west at 16 m.p.h. (26 km/h). The maximum sustained wind speed was 65 m.p.h. (105 km/h) and there were wind gusts to 80 m.p.h. (130 km/h). The minimum surface pressure was 981 mb.

Rainbands in the southern side of Tropical Storm Kompasu brought wind and rain to northern Luzon on Monday. The center of Kompasu passed just north of Luzon. Thunderstorms in bands in southern half of Tropical Storm Kompasu passed over the northern end of Luzon. Kompasu strengthened as it approached northern Luzon. More thunderstorms developed in bands revolving around the center of Tropical Storm Kompasu. Storms near the center of circulation generated upper level divergence that pumped mass away from the tropical storm. Winds to tropical storm force extended out 145 miles (235 km) from the center of Kompasu.

Tropical Storm Kompasu will move through an environment somewhat favorable for intensification during the next 36 hours. Kompasu will move over water where the Sea Surface Temperatures are near 29˚C. It will move south of an upper level ridge over China. The ridge will produce northeasterly winds that will blow toward the top of Kompasu’s circulation. Those winds will cause moderate vertical wind shear and the wind shear will inhibit intensification. Tropical Storm Kompasu is likely to strengthen gradually during the next 24 hours. Kompasu could intensify to a typhoon over the South China Sea.

Tropical Storm Kompasu will move south of a high pressure system over China. The high pressure system will steer Kompasu toward the west during the next several days. On its anticipated track the center of Tropical Storm Kompasu will pass south of Hong Kong in 24 hours. Kompasu could approach Hainan in 36 hours.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Namtheun intensified east of the northern Marianas. At 11:00 a.m. EDT on Monday the center of Tropical Storm Namtheun was located at latitude 19.4°N and longitude 154.0°E which put it about 555 miles (895 km) east of Agrihan. Namtheun was moving toward the west-northwest at 16 m.p.h. (26 km/h). The maximum sustained wind speed was 60 m.p.h. (95 km/h) and there were wind gusts to 75 m.p.h. (120 km/h). The minimum surface pressure was 988 mb.