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Typhoon Doksuri Moves over Taiwan Strait

Typhoon Doksuri moved over the Taiwan Strait on Thursday morning. At 11:00 a.m. EDT on Thursday the center of Typhoon Doksuri was located at latitude 22.3°N and longitude 119.0°E which put it about 170 miles (275 km) south-southeast of Xiamen China. Doksuri was moving toward the north-northwest at 8 m.p.h. (13 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 943 mb.

Radar images from Taiwan’s Central Weather Bureau showed clearly that there were concentric eyewalls at the core of Typhoon Doksuri. A small circular eye with a diameter of 7 miles (11 km) was at the center of Doksuri’s circulation. The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that ring of storms. The inner eyewall was surrounded by a relatively clear area, sometimes called a moat. A much larger, outer eyewall with a diameter of 60 miles (95 km) surrounded the inner eyewall and the moat. Bands of showers and thunderstorms were revolving around the concentric eyewalls. Storms in the concentric eyewalls generated upper level divergence that pumped mass away from the typhoon.

Both the inner and outer eyewalls of Typhoon Doksuri were over the Taiwan Strait. Mountains in Taiwan were deflecting some of the wind circulating around the eastern side of Doksuri, and the core of circulation tightened up a little. Winds to typhoon force extended out 45 miles (75 km) from the center of Doksuri’s circulation. Winds to tropical storm force extended out 160 miles (260 km) from the center. The Hurricane Intensity Index (HII) for Typhoon Doksuri was 22.1. The Hurricane Size Index (HSI) was 17.1 and the Hurricane Wind Intensity Size Index (HWISI) was 39.2. Typhoon Doksuri was bigger and stronger than Hurricane Delta when Delta hit Louisiana in 2020. Doksuri was capable of causing regional severe damage.

Typhoon Doksuri will move through an environment very favorable for intensification during the next 12 hours. Doksuri will move over water where the Sea Surface Temperatures are near 31˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. However, the concentric eyewalls at the center of Typhoon Doksuri will inhibit intensification. Doksuri could weaken if the inner eye and eyewall dissipate. If the inner eye and eyewall remain intact, then Typhoon Doksuri could strengthen during the next 12 hours.

Typhoon Doksuri will move around the western side of a subtropical high pressure system over the Western North Pacific Ocean. The high pressure system will steer Doksuri toward the north-northwest during the next 24 hours. On its anticipated track, Typhoon Doksuri will approach the east coast of China near Xiamen in 24 hours. Doksuri will bring strong winds and heavy rain to Fujian. Heavy rain could cause flash floods in some locations. Typhoon Doksuri could also cause a storm surge of up to 13 feet (4 meters) along the coast of Fujian.

Bands in the eastern side of Typhoon Doksuri will continue to drop heavy rain on parts of Taiwan during the next 24 hours. The heaviest rain will fall initially on the eastern side of mountains where the winds around Doksuri will push air up the slopes. Heavy rain could fall on the western sides of mountains when Typhoon Doksuri moves farther north and the wind over Taiwan blows from the south. Heavy rain is likely to cause flash floods in some locations.

Elsewhere over the Western North Pacific Ocean, a new tropical depression formed east of the Philippines. At 11:00 a.m. EDT on Thursday the center of Tropical Depression 06W was located at latitude 12.7°N and longitude 137.5°E which put it about 170 miles (275 km) northwest of Yap. The tropical depression was moving toward the west-northwest at 16 m.p.h. (26 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). The minimum surface pressure was 1003 mb. Tropical Depression 06W is forecast to move toward the Ryukyu Islands and to strengthen to a typhoon.

Typhoon Doksuri Drops Heavy Rain on Taiwan

Typhoon Doksuri dropped heavy rain on parts of Taiwan on Wednesday. At 5:00 p.m. EDT on Wednesday the center of Typhoon Doksuri was located at latitude 20.3°N and longitude 119.9°E which put it about 150 miles (240 km) south-southwest of Kaohsiung Taiwan. Doksuri was moving toward the west at 7 m.p.h. (11 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 947 mb.

Bands in the northern side of Typhoon Doksuri dropped heavy rain on parts of Taiwan on Wednesday. The heaviest rain was falling in eastern Taiwan, where the wind was pushing the air up the eastern slopes of mountains.. There were reports of flooding in the northern Philippines after the southern part of Doksuri dropped heavy rain in that region. There were also reports of casualties and electricity outages in the northern Philippines.

Typhoon Doksuri exhibited more organization on Wednesday after the core of Doksuri’s circulation started to move away from northern Luzon. Radar images from Taiwan’s Central Weather Bureau showed what appeared to concentric eyewalls at the core of Typhoon Doksuri. A small circular eye was at the center of Doksuri’s circulation. The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that ring of storms. The inner eyewall was surrounded by a relatively clear area, sometimes called a moat. A much larger, outer eyewall surrounded the inner eyewall and moat. Bands of showers and thunderstorms were revolving around the concentric eyewalls. Storms in the concentric eyewalls generated upper level divergence that pumped mass away from the typhoon.

Doksuri was still a large typhoon. Winds to typhoon force extended out 70 miles (110 km) from the center of Doksuri’s circulation. Winds to tropical storm force extended out 200 miles (320 km) from the center. The Hurricane Intensity Index (HII) for Typhoon Doksuri was 17.8. The Hurricane Size Index (HSI) was 23.1 and the Hurricane Wind Intensity Size Index (HWISI) was 40.9. Typhoon Doksuri was similar in size and intensity to Hurricane Gustav when Gustav Hit Louisiana in 2008. Doksuri was capable of causing widespread serious damage.

Typhoon Doksuri will move through an environment favorable for intensification during the next 24 hours. Doksuri will move over water where the Sea Surface Temperatures are near 30˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. However, the concentric eyewalls at the center of Typhoon Doksuri will inhibit intensification. Doksuri could weaken until the inner eye and eyewall dissipate. The strength of Typhoon Doksuri may not change much during the next 24 hours.

Typhoon Doksuri will move around the southwestern side of a subtropical high pressure system over the Western North Pacific Ocean. The high pressure system will steer Doksuri toward the northwest during the next 36 hours. On its anticipated track, the core of Typhoon Doksuri will pass southwest of Taiwan. Typhoon Doksuri will continue to drop heavy rain on parts of Taiwan during the next 24 hours. The heaviest rain will fall on the eastern side of mountains where the winds around Doksuri will push air up the slopes. Heavy rain is likely to cause flash floods in some locations.

Typhoon Doksuri will approach the east coast of China near Xiamen in 24 hours. Doksuri will bring strong winds and heavy rain to Fujian. Heavy rain could cause flash floods in some locations. Typhoon Doksuri could also cause a storm surge of up to 10 feet (3 meters) along the coast of Fujian.

Typhoon Doksuri Brings Wind and Rain to the Northern Philippines

Typhoon Doksuri brought strong winds and heavy rain to the northern Philippines on Tuesday. At 5:00 p.m. EDT on Tuesday the center of Typhoon Doksuri was located at latitude 19.2°N and longitude 121.3°E which put it about 40 miles (65 km) north-northeast of Claveria, Philippines. Doksuri was moving toward the west at 12 m.p.h. (19 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. (265 km/h). The minimum surface pressure was 936 mb.

Powerful Typhoon Doksuri brought strong winds and locally heavy rain to parts of northern Luzon, the Babuyan Islands, and the Batanes Islands on Tuesday. The eye of Typhoon Doksuri was just north of the coast of northern Luzon. The southern part of the eyewall of Doksuri was over the coast. Strong winds in other parts of the eyewall of Typhoon Doksuri were pounding the Babuyan Islands and the Batanes Islands.

The circulation around Typhoon Doksuri continued to be very well organized even though the southern part of the typhoon was over northern Luzon. A circular eye with a diameter of 28 miles (44 km) was at the center of Doksuri’s circulation. 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 revolving around the core of Typhoon Doksuri. Storms near the core generated strong upper level divergence that pumped mass away from the typhoon.

Doksuri continued to be a large typhoon. Winds to typhoon force extended out 70 miles (110 km) from the center of Doksuri’s circulation. Winds to tropical storm force extended out 230 miles (370 km) from the center. The Hurricane Intensity Index (HII) for Typhoon Doksuri was 28.3. The Hurricane Size Index (HSI) was 26.9 and the Hurricane Wind Intensity Size Index (HWISI) was 55.2. Typhoon Doksuri was similar in size and intensity to Hurricane Frances when Frances was east of Florida in 2004. Doksuri was capable of causing widespread severe damage.

Typhoon Doksuri will move through an environment favorable for a powerful typhoon during the next 24 hours. Doksuri will move over water where the Sea Surface Temperatures are near 30˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. However, much of the circulation around the southern part of Typhoon Doksuri will pass over northern Luzon. The flow of air over land is likely to somewhat disrupt the circulation around Doksuri. In addition, some of the circulation around the northern side of Doksuri will pass over Taiwan on Wednesday. Interactions with land are likely to cause Typhoon Doksuri to weaken during the next 24 hours.

Typhoon Doksuri will move around the southwestern side of a subtropical high pressure system over the Western North Pacific Ocean. The high pressure system will steer Doksuri toward the northwest during the next 24 hours. On its anticipated track, the core of Typhoon Doksuri will move slowly away from northern Luzon during the next 24 hours. The strongest part of Doksuri will continue to lash the Babuyan Islands and the Batanes Islands north of Luzon until the typhoon moves farther away. Doksuri will produce strong winds and very heavy rain in the Babuyan Islands and the Batanes Islands for another 24 hours. Heavy rain could cause flash floods in some locations. Typhoon Doksuri could cause a storm surge of up to 15 feet (5 meters) along the coast of some of the islands where the wind pushes water toward the shore. Heavy rain will also continue to fall over parts of northern Luzon on Wednesday. The core of Doksuri could be south of Taiwan in less than 24 hours. Typhoon Doksuri will bring strong winds and locally heavy rain to parts of Taiwan. The heaviest rain will fall on the eastern side of mountains where the winds around Doksuri will push air up the slopes.

Powerful Typhoon Doksuri Moves Near Northern Luzon

Powerful Typhoon Doksuri moved near northern Luzon on Monday night. At 11:00 p.m. EDT on Monday the center of Typhoon Doksuri was located at latitude 17.9°N and longitude 124.2°E which put it about 165 miles (265 km) east-southeast of Aparri, Philippines. Doksuri was moving toward the northwest at 9 m.p.h. (15 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.

Typhoon Doksuri strengthened to the equivalent of a Category 4 hurricane on the Saffir-Simpson Scale on Monday as it moved over the Western North Pacific Ocean just to the east of northern Luzon. A circular eye with a diameter of 40 miles (65 km) was present at the center of Doksuri’s circulation. The eye was surrounded with 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 Doksuri. Storms near the core generated strong upper level divergence that pumped mass away from the typhoon.

Doksuri was a large typhoon. Winds to typhoon force extended out 80 miles (130 km) from the center of Doksuri’s circulation. Winds to tropical storm force extended out 295 miles (475 km) from the center. The Hurricane Intensity Index (HII) for Typhoon Doksuri was 31.6. The Hurricane Size Index (HSI) was 28.8 and the Hurricane Wind Intensity Size Index (HWISI) was 60.4. Typhoon Doksuri was similar in size and intensity to Hurricane Wilma just before Wilma hit the Yucatan Peninsula in 2005. Doksuri was capable of causing widespread severe damage.

Typhoon Doksuri will move through an environment very favorable for a powerful typhoon during the next 24 hours. Doksuri will move over water where the Sea Surface Temperatures are near 30˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. Typhoon Doksuri could maintain its intensity during the next 24 hours unless an eyewall replacement cycle occurs. If the inner end of a rainband wraps around the existing eye and eyewall at the core of Doksuri, then concentric eyewalls could form. If concentric eyewalls, form, then an eyewall replacement cycle could cause Typhoon Doksuri to weaken.

Typhoon Doksuri will move around the southwestern side of a subtropical high pressure system over the Western North Pacific Ocean. The high pressure system will steer Doksuri toward the northwest during the next 24 hours. On its anticipated track, the core of Typhoon Doksuri could pass just north of Escarpada Point in northeastern Luzon. The strongest part of Doksuri could affect the Babuyan Islands and the Batanes Islands north of Luzon. Doksuri will bring extremely strong winds and very heavy rain to the Babuyan Islands and the Batanes Islands. Heavy rain could cause flash floods in some locations. Typhoon Doksuri could cause a storm surge of up to 15 feet (5 meters) along the coast of some of the islands where the wind pushes water toward the shore. Heavy rain could also fall over parts of northern Luzon. The core of Doksuri could be south of Taiwan in 36 hours.

Typhoon Doksuri Rapidly Intensifies to Equivalent of a Major Hurricane

Typhoon Doksuri rapidly intensified to the equivalent of a major hurricane on Sunday. At 11:00 p.m. EDT on Sunday the center of Typhoon Doksuri was located at latitude 15.5°N and longitude 126.3°E which put it about 390 miles (615 km) southeast of Aparri, Philippines. Doksuri was moving toward the west-northwest at 5 m.p.h. (8 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 Doksuri rapidly intensified to the equivalent of a major hurricane over the Western North Pacific Ocean east of Luzon on Sunday. An eye with a diameter of 40 miles (65 km) was at the center of Doksuri’s circulation. 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 revolving around the core of Typhoon Doksuri. Storms near the core generated strong upper level divergence that pumped mass away from the typhoon. The removal of large quantities of mass caused the surface pressure to decrease rapidly.

The size of the circulation around Typhoon Doksuri increased when Doksuri rapidly intensified. Winds to typhoon force extended out 70 miles (110 km) from the center of Doksuri’s circulation. Winds to tropical storm force extended out 220 miles (355 km) from the center. The Hurricane Intensity Index (HII) for Typhoon Doksuri was 20.6. The Hurricane Size Index (HSI) was 22.7 and the Hurricane Wind Intensity Size Index (HWISI) was 43.3. Doksuri was capable of causing widespread major damage.

Typhoon Doksuri will move through an environment very favorable for intensification during the next 24 hours. Doksuri will move over water where the Sea Surface Temperatures are near 30˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. Typhoon Doksuri will continue to intensify during the next 24 hours. Doksuri could intensify rapidly at times.

Typhoon Doksuri will move around the southwestern side of a subtropical high pressure system over the Western North Pacific Ocean. The high pressure system will steer Doksuri toward the northwest during the next 24 hours. On its anticipated track, Typhoon Doksuri could be near northeastern Luzon within 36 hours. Doksuri could approach southern Taiwan in 60 hours.

Doksuri Rapidly Intensifies to a Typhoon

Former Tropical Storm Doksuri rapidly intensified to a typhoon over the Western North Pacific Ocean east of Luzon on Sunday. At 11:00 a.m. EDT on Sunday the center of Typhoon Doksuri was located at latitude 15.2°N and longitude 127.4°E which put it about 475 miles (765 km) southeast of Aparri, Philippines. Doksuri was moving toward the west-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 972 mb.

Former Tropical Storm Doksuri rapidly intensified to a typhoon during the past 12 hours. The inner end of a rainband wrapped around the center of Doksuri’s circulation. An eye at the center of circulation was evident on conventional and microwave satellite images. 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 revolving around the core of Typhoon Doksuri. Storms near the core generated strong upper level divergence that pumped mass away from the typhoon. The removal of large quantities of mass caused the surface pressure to decrease rapidly.

The size of the circulation around Typhoon Doksuri increased while Doksuri rapidly intensified. Winds to typhoon force extended out 70 miles (110 km) from the center of Doksuri’s circulation. Winds to tropical storm force extended out 215 miles (345 km) from the center. The Hurricane Intensity Index (HII) for Typhoon Doksuri was 13.9. The Hurricane Size Index (HSI) was 22.1 and the Hurricane Wind Intensity Size Index (HWISI) was 36.0.

Typhoon Doksuri will move through an environment very favorable for intensification during the next 24 hours. Doksuri will move over water where the Sea Surface Temperatures are near 30˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. Typhoon Doksuri is likely to continue to intensify rapidly during the next 24 hours. Doksuri could strengthen to the equivalent of a major hurricane.

Typhoon Doksuri will move around the southwestern side of a subtropical high pressure system over the Western North Pacific Ocean. The high pressure system will steer Doksuri toward the northwest during the next 24 hours. On its anticipated track, Typhoon Doksuri could be near northeastern Luzon within 48 hours. Doksuri could approach southern Taiwan in 72 hours.

Tropical Storm Doksuri Intensifies East of the Philippines

Tropical Storm Doksuri intensified east of the Philippines on Saturday. At 11:00 p.m. EDT on Saturday the center of Tropical Storm Doksuri was located at latitude 14.9°N and longitude 128.7°E which put it about 830 miles (1340 km) southeast of Taipei, Taiwan. Doksuri was moving toward the west-northwest at 8 m.p.h. (13 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 989 mb.

Tropical Storm Doksuri exhibited better organization as it intensified over the Western North Pacific Ocean east of the Philippines on Saturday. The inner end of a rainband wrapped around the eastern side of the center of Doksuri’s circulation. Storms near the center of circulation generated upper level divergence that pumped mass away from the tropical storm. More thunderstorms developed in bands in the eastern half of Tropical Storm Doksuri. Bands in the western half of Doksuri still consisted primarily of showers and lower clouds. Winds to tropical storm force extended out 115 miles (185 km) from the center of Doksuri.

Tropical Storm Doksuri will move through an environment favorable for intensification during the next 24 hours. Doksuri will move over water where the Sea Surface Temperatures are near 30˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. Tropical Storm Doksuri will intensify during the next 24 hours. Doksuri is likely to strengthen to a typhoon on Sunday.

Tropical Storm Doksuri will move around the southwestern side of a subtropical high pressure system over the Western North Pacific Ocean. The high pressure system will steer Doksuri toward the northwest during the next 24 hours. On its anticipated track, Tropical Storm Doksuri will move closer to northern Luzon. Doksuri could reach Taiwan in less than four days.

Typhoon Rai Rapidly Weakens to a Tropical Storm

Former Typhoon Rai rapidly weakened to a tropical storm south-southwest of Hong Kong on Monday. At 4:00 p.m. EST on Monday the center of Tropical Storm Rai was located at latitude 20.1°N and longitude 113.5°E which put it about 190 miles (305 km) south-southwest of Hong Kong. Rai was moving toward the northeast at 13 m.p.h. (20 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.

A surface high pressure system over eastern Asia produced northeasterly winds that transported drier air which was pulled into the circulation of former Typhoon Rai. The drier air caused the thunderstorms in Rai’s circulation to dissipate and the circulation weakened. Bands revolving around the center of Tropical Storm Rai consisted almost entirely of showers and lower clouds. Winds to tropical storm force extended out 65 miles (105 km) from the center of circulation.

Since Tropical Storm Rai consists of a shallow circulation, it will be steered by the winds in the lower levels of he atmosphere. Rai will move around the northwestern part of a high pressure system over the Western North Pacific Ocean. The high pressure system will steer Tropical Storm Rai toward the east-northeast during the next 24 hours. On its anticipated track Tropical Storm Rai could be southwest of Taiwan in 24 hours.

Tropical Storm Rai will move through an environment unfavorable for a tropical cyclone. Rai will move over water where the Sea Surface Temperatures are near 27˚C. However, Rai will continue to be surrounded by drier air, which will prevent the formation of new thunderstorms. In addition, an upper level trough over eastern Asia will produce southwesterly winds that will blow across the top of Rai’s circulation. Those winds will cause strong vertical wind shear and the shear will also be unfavorable for intensification. Tropical Storm Rai will continue to weaken during the next 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.