Tag Archives: Vietnam

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.

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 Noru Makes Landfall in Central Vietnam

Typhoon Noru made landfall on the coast of central Vietnam near Da Nang on Tuesday evening. At 7:00 p.m. EDT on Tuesday the center of Typhoon Noru was located at latitude 16.1°N and longitude 108.1°E which put it about 5 miles (10 km) north of Da Nang, Vietnam. Noru was moving toward the west at 15 m.p.h. (24 km/h). The maximum sustained wind speed was 110 m.p.h. (175 km/h) and there were wind gusts to 130 m.p.h. (210 km/h). The minimum surface pressure was 959 mb.

The core of Typhoon Noru made landfall near Da Nang, Vietnam on Tuesday evening. The distribution of thunderstorms around Noru became asymmetrical as it approached the coast of Vietnam. Many of the thunderstorms were occurring in the western half of Noru’s circulation. Typhoon Noru was moving under the southern part of an upper level ridge over China. The ridge was producing easterly winds that were blowing toward the top of Noru’s circulation. Those winds were causing vertical wind shear and the wind shear was causing the asymmetrical distribution of thunderstorms.

Winds to typhoon force extended out 25 miles (40 km) from the center of Typhoon Noru. Winds to tropical storm force extended out 120 miles (195 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Noru was 19.2. The Hurricane Size Index (HSI) was 10.9 and the Hurricane Wind Intensity Size Index (HWISI) was 30.1. Typhoon Noru was capable of causing regional serious damage.

Typhoon Noru will move south of a high pressure system over China. The high pressure system will steer Noru toward the west during the next 36 hours. Typhoon Noru will weaken as it moves farther inland. On its anticipated track Typhoon Noru will move across central Vietnam during the next 12 hours. Noru will move over southern Laos and eastern Thailand. The strongest winds will occur in the area around Da Nang and Hue. Typhoon Noru will drop locally heavy rain over central Vietnam, southern Laos and eastern Thailand. Heavy rain could cause flash floods in some locations.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Kulap strengthened gradually southeast of Japan. At 5:00 p.m. EDT on Tuesday the center of Tropical Storm Kulap was located at latitude 31.7°N and longitude 145.2°E which put it about 395 miles (640 km) southeast of Tokyo, Japan. Kulap was moving toward the northeast at 21 m.p.h. (33 km/h). The maximum sustained wind speed was 65 m.p.h. (105 km/h) and there were wind gusts to 75 m.p.h. (120 km/h). The minimum surface pressure was 988 mb.

Typhoon Noru Moves Toward Vietnam

Typhoon Noru moved over the South China Sea toward Vietnam on Monday afternoon. At 5:00 p.m. EDT on Monday the center of Typhoon Noru was located at latitude 15.9°N and longitude 113.3E which put it about 380 miles (615 km) east of Da Nang, Vietnam. Noru was moving toward the west at 20 m.p.h. (32 km/h). The maximum sustained wind speed was 105 m.p.h. (165 km/h) and there were wind gusts to 125 m.p.h. (200 km/h). The minimum surface pressure was 964 mb.

Typhoon Noru strengthened on Monday afternoon as it moved toward central Vietnam. A small circular eye was present at the center of Noru’s circulation. The eye was surrounded by a ring of strong thunderstorms and the strongest winds were occurring in that ring of storms. Bands of showers and thunderstorms were revolving around the core of Typhoon Noru. Storms near the core generated upper level divergence that pumped mass away from the typhoon.

The circulation around Typhoon Noru increased in size on Monday. Winds to typhoon force extended out 50 miles (80 km) from the center of Noru’s circulation. Winds to tropical storm force extended out 180 miles (290 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Norw was 17.8. The Hurricane Size Index (HSI) was 16.9 and the Hurricane Wind Intensity Size Index (HWISI) was 34.7. Typhoon Nora was capable of causing regional serious damage.

Typhoon Noru will move through an environment favorable for intensification during the next 24 hours. Noru 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 over eastern China. The ridge will produce easterly winds that will blow toward the top of Noru’s circulation. Those winds will cause some vertical wind shear, but the wind shear will not be strong enough to prevent intensification. Typhoon Noru is likely to intensify during the next 24 hours. Noru could strengthen to the equivalent of a major hurricane.

Typhoon Noru will move around the southern side of a high pressure system over China. The high pressure system will steer Noru toward the west during the next 24 hours. On its anticipated track Typhoon Noru will hit the coast of Vietnam near Da Nang in 24 hours. Typhoon Noru will be capable of causing major damage when it hits central Vietnam. Noru will bring strong, gusty winds and locally heavy rain to central Vietnam. Heavy rain is likely to cause flash floods in some locations.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Kulap passed near Iwo To. At 5:00 p.m. EDT on Monday the center of Tropical Storm Kulap was located at latitude 27.4°N and longitude 141.8°E which put it about 140 miles (225 km) north-northeast of Iwo To. Kulap was moving toward the north at 20 m.p.h. (32 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 997 mb.

Typhoon Noru Hits Luzon

Typhoon Noru hit Luzon on Sunday morning. At 5:00 a.m. EDT on Sunday the center of Typhoon Noru was located at latitude 15.1°N and longitude 121.9°E which put it about 105 miles (165 km) east-northeast of Manila, Philippines. Noru was moving toward the west at 14 m.p.h. (22 km/h). The maximum sustained wind speed was 150 m.p.h. (240 km/h) and there were wind gusts to 185 m.p.h. (295 km/h). The minimum surface pressure was 926 mb.

Small, but powerful Typhoon Noru hit the coast of Luzon east-northeast of Manila on Sunday morning. Winds to typhoon force extended out 30 miles (50 km) from the center of Typhoon Noru. Winds to tropical storm force extended out 90 miles (145 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Noru was 31.6. The Hurricane Size Index (HSI) was 11.1 and the Hurricane Wind Intensity Size Index (HWISI) was 42.7. Typhoon Noru was capable of causing regional severe damage.

Typhoon Noru will move around the southern side of a high pressure system over the Western North Pacific Ocean. The high pressure system will steer Noru toward the west during the next 72 hours. On its anticipated track, Typhoon Noru will move across central Luzon. The center of Noru could pass just north of Manila in a few hours. Typhoon Noru will bring strong, gusty winds to central Luzon. Severe damage could occur near the small core of Noru’s circulation. Widespread electrical outages are likely. Heavy rain will also fall over near the core of Typhoon Noru. Heavy rain is likely to cause flash floods in some locations.

Since the circulation around Typhoon Noru is small, it is likely to weaken quickly while it passes over Luzon. There is a chance that Noru could still be a typhoon when it reaches the South China Sea. Noru will move into an environment favorable for intensification when it moves over the South China Sea. Noru 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 over eastern China. The ridge will produce easterly winds that will blow toward the top of Noru’s circulation. Those winds will cause some vertical wind shear, but the wind shear will not be strong enough to prevent intensification.

Typhoon Noru could approach the coast of Vietnam in less than 72 hours. Noru could be a typhoon when it approaches the coast of Vietnam.

Tropical Storm Ma-on Makes Landfall in Southeast China

Tropical Storm Ma-on made landfall in southeast China on Thursday morning. At 5:00 a.m. EDT on Thursday the center of Tropical Storm Ma-on was located at latitude 22.0°N and longitude 109.2°E which put it about 80 miles (130 km) east of Qinzhou. Ma-on was moving toward the west-northwest at 20 m.p.h. (32 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 Ma-on made landfall on the coast of southeastern China between Dianbai and Zhanjiang on Thursday morning. The center of Ma-on made landfall near Wuchuan. Ma-on was a strong tropical storm at the time of landfall. The maximum sustained wind speed was 65 m.p.h. (105 km/h). The distribution of thunderstorms and heavy rain in Tropical Storm Ma-on was asymmetrical. Many of the thunderstorms with heavy rain were occurring in the southern half of Ma-on’s circulation. The strongest winds were occurring over the South China Sea. Winds to tropical storm force extended out 130 miles (210 km) from the center of Tropical Storm Ma-on.

Tropical Storm Ma-on will move around the southwestern part of a high pressure system over the Western North Pacific during the next 36 hours. The high pressure system will steer Ma-on toward the west-northwest. On its anticipated track Tropical Storm Ma-on will move inland over southeastern China and northern Vietnam. Ma-on will drop locally heavy rain over parts of southeastern China and northern Vietnam. Heavy rain could cause flash floods in some locations.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Tokage was weakening as it sped away from Japan. At 5:00 a.m. EDT on Thursday the center of Tropical Storm Tokage was located at latitude 41.3°N and longitude 153.9°E which put it about 610 miles (985 km) east of Misawa, Japan. Tokage was moving toward the northeast at 25 m.p.h. (40 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 987 mb.

Tropical Storm Mulan Brings Rain to Southern China

Tropical Storm Mulan brought rain to southern China on Wednesday. At 11:00 a.m. EDT on Wednesday the center of Tropical Storm Mulan was located at latitude 20.9°N and longitude 108.9°E which put it about 40 miles (60 km) southwest of Beihai, China. Mulan was moving toward the west-northwest at 16 m.p.h. (26 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 998 mb.

Rainbands on the northern side of Tropical Storm Mulan brought rain to parts of southern China on Wednesday. Rain fell over coastal parts of southern China from Hong Kong to the border with Vietnam. Tropical Storm Mulan also dropped locally heavy rain on Hainan Island. Rainbands in the northwestern part of Mulan’s circulation brought rain to northeastern Vietnam.

Tropical Storm Mulan will move across the Gulf of Tonkin during the next 12 hours toward northern Vietnam. Mulan will move south of a high pressure system over the Western North Pacific Ocean and eastern China. The high pressure system will steer Mulan toward the west-northwest during the next day or so. On its anticipated track the center of Tropical Storm Mulan will make landfall on the coast of northeastern Vietnam in about 12 hours.

Tropical Storm Mulan will move through an environment marginally favorable for intensification during the next few hours. Mulan will move over water where the Sea Surface Temperatures are near 30˚C. It will move under the southern part of an upper level ridge centered over eastern Asia. The upper level ridge will produce easterly winds that will blow toward the top of Mulan’s circulation. Those winds will cause some vertical wind shear and the shear will inhibit intensification. Tropical Storm Mulan is likely to maintain its current intensity during the next 12 hours, but it could strengthen a little prior to landfall in northeastern Vietnam.

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.

Typhoon Rai Rapidly Intensifies Back to Equivalent of Cat. 5 Hurricane

Typhoon Rai rapidly intensified back to the equivalent of a Category 5 hurricane on the Saffir-Simpson Scale on Saturday over the South China Sea. At 4:00 p.m. EST on Saturday the center of Typhoon Rai was located at latitude 12.8°N and longitude 111.9°E which put it about 355 miles (575 km) southeast of Da Nang, Vietnam. Rai was moving toward the west-northwest at 16 m.p.h. (26 km/h). The maximum sustained wind speed was 165 m.p.h. (265 km/h) and there were wind gusts to 200 m.p.h. (320 km/h). The minimum surface pressure was 910 mb.

Typhoon Rai rapidly intensified to the equivalent of a Category 5 hurricane as it moved over the warm water in the South China Sea on Saturday. The diameter of the eye at the center of Rai contracted to 25 miles (40 km) as the typhoon rapidly intensified. The eye was surrounded by a ring of strong thunderstorms and the strongest winds were occurring in that ring of storms. Bands of showers and thunderstorms were revolving around the core of Typhoon Rai. Storms near the core generated upper level divergence that pumped large quantities of mass away to the west and north of the typhoon. The removal of so much mass allowed the surface pressure to decrease rapidly.

Winds to typhoon force extended out 45 miles (75 km) from the center of Typhoon Rai. Winds to tropical storm force extended out 150 miles (240 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Rai was 36.7. The Hurricane Size Index (HSI) was 19.6 and the Hurricane Wind intensity Size Index (HWISI) was 56.3. Rai was capable of causing regional catastrophic damage. Typhoon Rai was stronger than it was when it hit the southern Philippines.

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. It will move under the western end of an upper level ridge over the Western North Pacific Ocean. The ridge will produce southerly winds that will blow toward the top of Typhoon Rai’s circulation. A surface high pressure system over Asia will produce northeasterly winds in the lower levels over the atmosphere. A combination of northeasterly winds in the lower levels and southerly winds in the upper levels will cause the vertical wind shear to increase. The northeasterly winds in the lower levels will also transport drier air toward the northwestern part of Rai’s circulation. Stronger vertical wind shear and drier air will cause Typhoon Rai to weaken during the next 36 hours. If the inner end of a rainband wraps around the existing eye and eyewall, then an eyewall replacement cycle could cause Rai to weaken more rapidly.

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 during the next 24 hours. On its anticipated track Typhoon Rai is forecast to turn toward the north before the center of Rai reaches the coast of Vietnam. Rainbands on the western side of Typhoon Rai could bring gusty winds and locally heavy rain to the central coast of Vietnam within 18 hours.