Tag Archives: 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.

Typhoon Rai Strengthens over South China Sea

Typhoon Rai strengthened to the equivalent of a Category 4 hurricane on the Saffir-Simpson Scale over the South China Sea on Saturday morning. At 10:00 a.m. EST on Saturday the center of Typhoon Rai was located at latitude 12.2°N and longitude 113.0°E which put it about 450 miles (725 km) southeast of Da Nang, Vietnam. Rai was moving toward the west-northwest at 17 m.p.h. (28 km/h). The maximum sustained wind speed was 130 m.p.h. (210 km/h) and there were wind gusts to 160 m.p.h. (260 km/h). The minimum surface pressure was 942 mb.

Typhoon Rai strengthened to the equivalent of a Category 4 hurricane as it moved over the warm water in the South China Sea on Saturday morning. An eye with a diameter of 30 miles (50 km) was at the center of Rai’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 Rai. Storms near the core generated upper level divergence that pumped mass away to the west and north of the typhoon.

Winds to typhoon force extended out 35 miles (55 km) from the center of Typhoon Rai. Winds to tropical storm force extended out 170 miles (275 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Rai was 25.1. The Hurricane Size Index (HSI) was 14.3 and the Hurricane Wind intensity Size Index (HWISI) was 39.4. Rai was capable of causing regional severe damage.

Typhoon Rai will move through an environment that will become unfavorable for intensification during the next 48 hours. Rai will move over water where the Sea Surface Temperatures are near 28˚C. It will move under the southern side of an upper level ridge over the Western North Pacific Ocean. The ridge will produce southeasterly 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 southeasterly 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 weekend.

Typhoon Rai will move around the western end of a surface high pressure system over the Western North Pacific Ocean during the next 36 hours. The high pressure system will steer Rai toward the north during the next 36 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 in 24 hours.

Typhoon Rai Moves over South China Sea

Typhoon Rai moved over the South China Sea on Friday. At 4:00 p.m. EST on Friday the center of Typhoon Rai was located at latitude 10.9°N and longitude 116.6°E which put it about 175 miles (285 km) west-northwest of Puerto Princesa, Philippines. Rai was moving toward the west-northwest at 14 m.p.h. (22 km/h). The maximum sustained wind speed was 115 m.p.h. (185 km/h) and there were wind gusts to 145 m.p.h. (230 km/h). The minimum surface pressure was 956 mb.

Typhoon Rai strengthened back to the equivalent of a major hurricane after it moved across Palawan and over the South China Sea. An eye with a diameter of 30 miles (50 km) developed at the center of Rai’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 Rai. Storms near the core generated upper level divergence that pumped mass away to the west and north of the typhoon.

Winds to typhoon force extended out 40 miles (65 km) from the center of Typhoon Rai. Winds to tropical storm force extended out 165 miles (270 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Rai was 20.6. The Hurricane Size Index (HSI) was 16.4 and the Hurricane Wind intensity Size Index (HWISI) was 37.0. Rai was capable of causing regional major damage.

Typhoon Rai will move through an environment favorable for intensification during the next 24 hours. Rai 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 the Western North Pacific Ocean. The ridge will produce easterly winds that will blow toward the top of Typhoon Rai’s circulation. Those winds will cause some vertical wind shear but the wind shear will be too small to prevent intensification. Typhoon Rai could strengthen again during the next 24 hours.

Typhoon Rai will move south of a surface high pressure system over the Western North Pacific Ocean during the next day or so. The high pressure system will steer Rai toward the west-northwest during the next 24 hours. Rai will move more toward the northwest when it reaches the western end of the high pressure system. On its anticipated track Typhoon Rai could approach the coast of Vietnam in 36 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 Lionrock Drops Heavy Rain on Northern Vietnam

Tropical Storm Lionrock dropped heavy rain on parts of northern Vietnam on Saturday night. At 11:00 p.m. EDT on Saturday the center of Tropical Storm Lionrock was located at latitude 20.4°N and longitude 107.1°E which put it about 25 miles (40 km) southeast of Haiphong, Vietnam. Lionrock was moving toward the west-northwest at 15 m.p.h. (24 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 995 mb.

Tropical Storm Lionrock dropped heavy rain over the part of northern Vietnam between Hanoi and Haiphong on Saturday night. The heaviest rain was falling in bands in the western half of Tropical Storm Lionrock. Bands in the eastern side of Lionrock consisted primarily of showers and lower clouds. Winds to tropical storm force extended out 120 miles (195 km) from the center of Lionrock’s circulation.

Tropical Storm Lionrock will move south of a high pressure system over China during the next 24 hours. The high pressure system will steer Lionrock toward the west during the next day or so. On its anticipated track Tropical Storm Lionrock will move across northern Vietnam and northern Laos. Lionrock will bring gusty winds and locally heavy rain to parts of northern Vietnam and northern Laos. Heavy rain could cause flash floods in some locations.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Kompasu was spinning east of Luzon and Tropical Storm Namtheun formed east of the northern Marianas. At 11:00 p.m. EDT on Saturday the center of Tropical Storm Kompasu was located at latitude 15.9°N and longitude 129.8°E which put it about 470 miles (760 km) east of Luzon. Kompasu was moving toward the northwest at 9 m.p.h. (15 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 990 mb. Kompasu is forecast to move toward the west-northwest and to strengthen.

At 11:00 p.m. EDT on Saturday the center of Tropical Storm Namtheun was located at latitude 17.0°N and longitude 160.3°E which put it about 980 miles (1580 km) east of Alamagan. Namtheun was moving toward the west at 8 m.p.h. (13 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 1000 mb. Namtheun was forecast to move toward the northwest and to strengthen.

Tropical Storm Mindulle Brings Wind and Rain to Marianas, Dianmu Hits Vietnam

Tropical Storm Mindulle brought wind and rain to the Marianas on Thursday and Tropical Storm Dianmu hit Vietnam. At 11:00 a.m. EDT on Thursday the center of Tropical Storm Mindulle was located at latitude 14.1°N and longitude 142.3°E which put it about 175 miles (280 km) west-northwest of Guam. Mindulle moving toward the west-northwest at 23 m.p.h. (37 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.

Tropical Storm Mindulle brought wind and rain to the Marianas including Guam on Thursday. Tropical Storm Warnings were in effect for Guam, Rota, Tinian and Saipan. Mindulle was intensifying as it moved across the Marianas. More thunderstorms developed about the center of circulation. Bands of showers and thunderstorms were revolving the center of Tropical Storm Mindulle. Storms near the center generated upper level divergence that pumped mass away from the tropical storm. The strongest winds were occurring in the northeastern part of Mindulle. Winds to tropical storm force extended out 150 miles (240 km) in the northeastern quadrant to Mindulle.

Tropical Storm Mindulle will move through an environment favorable for intensification during the next few days. Mindulle will move over water where the Sea Surface Temperatures are near 30˚C. It will move into a region where the upper level winds are weak and there will be little vertical wind shear. Tropical Storm Mindulle will continue to intensify during the next 36 hours. Mindulle could strengthen to a typhoon in 24 hours. Mindulle could intensify more rapidly after an inner core becomes more well developed. It could intensify to the equivalent of a major hurricane during the weekend.

Tropical Storm Mindulle will move around the western end of a subtropical high pressure system over the Western North Pacific Ocean during the next several days. The high will steer Mindulle toward the northwest during the next 48 hours. On its anticipated track Tropical Storm Mindulle will move quickly away from the Marianas. Mindulle could approach the Ryukyu Islands in a few days.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Dianmu bought wind and rain to central Vietnam. At 11:00 a.m. EDT on Thursday the center of Tropical Storm Dianmu was located at latitude 15.4°N and longitude 108.3°E which put it about 15 miles (25 km) southeast of Tam Ky, Vietnam. Dianmu was moving toward the northwest at 17 m.p.h. (28 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 1000 mb. Tropical Storm Dianmu will weaken as it moves inlands over Southeast Asia. Dianmu will bring gusty winds and locally heavy rain to central Vietnam, southern Laos and northern Cambodia. Heavy rain could cause flash floods in some locations.

Tropical Depression 20W Forms Southeast of Guam

Tropical Depression Twenty-W formed southeast of Guam on Wednesday. At 11:00 a.m. EDT on Wednesday the center of Tropical Depression Twenty-W was located at latitude 11.5°N and longitude 148.1°E which put it about 305 miles (490 km) east-southeast of Guam. The tropical depression moving toward the west-northwest at 10 m.p.h. (16 km/h). The maximum sustained wind speed was 30 m.p.h. (50 km/h) and there were wind gusts to 40 m.p.h. (65 km/h). T he minimum surface pressure was 1005 mb.

Tropical Depression Twenty-W developed over the Western North Pacific Ocean southeast of Guam on Wednesday. The circulation around the tropical depression was organizing quickly. Thunderstorms formed near the center of the tropical depression. Other thunderstorms developed in bands revolving around the center of circulation. Storms near the center began to generate upper level divergence that pumped mass away from the depression.

Tropical Depression Twenty-W will move through an environment favorable for intensification during the next few days. The tropical depression will move over water where the Sea Surface Temperatures are near 30˚C. It will move into a region where the upper level winds are weak and there will be little vertical wind shear. Tropical Depression Twenty-W could strengthen to a tropical storm during the next 12 hours. It could intensify more rapidly after an inner core becomes more well developed. It could intensify to a typhoon within 36 hours.

Tropical Depression Twenty-W will move around the western end of a subtropical high pressure system over the Western North Pacific Ocean during the next several days. The high will steer the tropical depression toward the northwest during the next 36 hours. On its anticipated track the tropical depression could reach the Marianas in less than 24 hours. Tropical Depression Twenty-W could intensify to a tropical storm before it reaches the Marianas. It will bring gusty winds and locally heavy rain to the Marianas including Guam.

Elsewhere over the Western North Pacific Ocean, Tropical Depression Twentyone-W formed over the South China Sea east of Vietnam. At 11:00 a.m. EDT on Wednesday the center of Tropical Depression Twentyone-W was located at latitude 12.9°N and longitude 112.8°E which put it about 400 miles (605 km) east-southeast of Da Nang, Vietnam. The tropical depression moving toward the west-northwest at 13 m.p.h. (20 km/h). The maximum sustained wind speed was 30 m.p.h. (50 km/h) and there were wind gusts to 40 m.p.h. (65 km/h). T he minimum surface pressure was 1005 mb. Tropical Depression Twentyone-W is forecast to move toward the west-northwest and to strengthen to a tropical storm. It could reach the coast of Vietnam south of Da Nang in about 24 hours.

Typhoon Chanthu Moves Away from Taiwan

Typhoon Chanthu moved away from Taiwan on Sunday. At 11:00 a.m. EDT on Sunday the center of Typhoon Chanthu was located at latitude 26.8°N and longitude 122.7°E which put it about 105 miles (165 km) northeast of Taipei, Taiwan. Chanthu was moving toward the north-northeast at 12 m.p.h. (19 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 965 mb.

Typhoon Chanthu moved away from Taiwan on Sunday and the weather conditions were improving there. The core of Chanthu passed east of Taiwan and so it remained intact. A small circular eye was present at the center of Typhoon Chanthu. The eye was surrounded by a ring of strong thunderstorms and the strongest winds were occurring in that ring of storms. Multiple bands of showers and thunderstorms were revolving around the core of Chanthu. Storms near the core generated upper level divergence that pumped mass away to the north of the typhoon.

The overall circulation of Typhoon Chanthu was larger after it moved past Taiwan. Winds to typhoon force extended out 25 miles (40 km) from the center of Chanthu. Winds to tropical storm force extended out 190 miles (305 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Chanthu was 19.2. The Hurricane Size Index (HSI) was 10.7 and the Hurricane Wind Intensity Size Index (HWISI) was 29.9. Typhoon Chanthu was capable of causing regional serious damage.

Typhoon Chanthu will move through an environment that will be mostly unfavorable for intensification during the next 36 hours. Chanthu will move over water where the Sea Surface Temperature is near 29˚C. An upper level trough over eastern China will produce southwesterly winds that will blow toward the top of Chanthu’s circulation. Those winds will cause moderate vertical wind shear. The wind shear will likely be strong enough to cause Typhoon Chanthu to weaken gradually.

Typhoon Chanthu will move around the western side of a subtropical high pressure system over the Western North Pacific Ocean. The high will steer Chanthu toward the north during the next 24 hours. On its anticipated track Typhoon Chantu will continue to move away from Taiwan. Chanthu could approach the coast of Chine south of Shanghai in 24 hours. Typhoon Chanthu will bring gusty winds and locally heavy rain to the parts of east coast of China on Monday.

Elsewhere over the Western North Pacific Ocean, Tropical Depression Conson weakened near the coast of Vietnam. At 11:00 a.m. EDT on Sunday the center of Tropical Depression Conson was located at latitude 15.4°N and longitude 109.1°E which put it about 70 miles (110 km) southeast of Da Nang, Vietnam. Conson was stationary. The maximum sustained wind speed was 35 m.p.h. (55 km/h) and there were wind gusts to 45 m.p.h. (75 km/h). The minimum surface pressure was 1003 mb.

Typhoon Chanthu Brings Wind and Rain to Taiwan

Typhoon Chanthu brought wind and rain to Taiwan on Saturday morning. At 11:00 a.m. EDT on Saturday the center of Typhoon Chanthu was located at latitude 22.2°N and longitude 121.8°E which put it about 100 miles (160 km) south-southeast of Hualien, Taiwan. Chanthu was moving toward the north-northeast at 8 m.p.h. (13 km/h). The maximum sustained wind speed was 140 m.p.h. (225 km/h) and there were wind gusts to 165 m.p.h. (270 km/h). The minimum surface pressure was 938 mb.

Bands in the northwestern part of Typhoon Chanthu brought wind and rain to eastern Taiwan on Saturday morning. Typhoon Chanthu appeared to be in the middle of another eyewall replacement cycle. A small eye was present at the center of Chanthu. The eye was surrounded by concentric eyewalls. The strongest winds were occurring in the innermost eyewall. Bands of showers and thunderstorms were revolving around the core of Typhoon Chanthu. Storms near the core generated upper level divergence that pumped mass away from the typhoon.

The current eyewall replacement cycle increased the overall size of the circulation around Typhoon Chanthu. Winds to typhoon force extended out 35 miles (55 km) from the center of Chanthu. Winds to tropical storm force extended out 150 miles (240 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Chanthu was 28.3. The Hurricane Size Index (HSI) was 12.5 and the Hurricane Wind Intensity Size Index (HWISI) was 40.8. Typhoon Chanthu was capable of causing regional severe damage.

Typhoon Chanthu will move over water capable of supporting an intense typhoon during the next 24 hours. Chanthu will move over water where the Sea Surface Temperature is near 30˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. The current eyewall replacement cycle could cause Typhoon Chanthu to weaken if the innermost eyewall dissipates.

Typhoon Chanthu will move around the western end of a high pressure system over the Western North Pacific. The high pressure system will steer Chanthu toward the north during the next 36 hours. On its anticipated track the center of Typhoon Chanthu will be near northeastern Taiwan in 18 hours. Typhoon Chanthu will drop very heavy rain over eastern Taiwan. The risk of flash floods is very high. Even though the core of Chanthu may pass just east of Taiwan, strong winds are likely to cause damage along the east coast of Taiwan.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Conson was approaching toward central Vietnam. At 11:00 a.m. EDT on Saturday the center of Tropical Storm Conson was located at latitude 15.4°N and longitude 109.0°E which put it about 65 miles (105 km) southeast of Da Nang, Vietnam. Conson was moving toward the west-southwest at 5 m.p.h. (8 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.