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Typhoon In-Fa Churns Southeast of Ishigaki

Typhoon In-Fa churned southeast of Ishigaki, Japan on Thursday. At 11:00 a.m. EDT on Thursday the center of Typhoon In-Fa was located at latitude 23.7°N and longitude 125.8°E which put it about 120 miles (195 km) southeast of Ishigaki, Japan. In-Fa was moving toward the northwest at 2 m.p.h. (3 km/h). The maximum sustained wind speed was 100 m.p.h. (160 km/h) and there were wind gusts to 120 m.p.h. (195 km/h). The minimum surface pressure was 957 mb.

Typhoon In-Fa went through an eyewall replacement cycle as it moved slowly toward the southwestern Ryukyu Islands on Thursday. The inner end of an rainband wrapped completely around the original eye and eyewall. Two concentric eyewalls existed simultaneously for a time on Wednesday. Low level convergence became concentrated in the newer, outer eyewall and the inner eyewall dissipated. The eyewall replacement cycle left a much larger eye with a diameter of 65 miles (105 km) at the center of Typhoon In-Fa. Bands of showers and thunderstorms were revolving around the new, larger eye. Storms near the eye generated upper level divergence that pumped mass away from the typhoon.

The circulation around Typhoon In-Fa was large. Winds to typhoon force extended out 70 miles (110 km) from the center of In-Fa. Winds to tropical storm force extended out 230 miles (370 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon In-Fa was 16.5. The Hurricane Size Index (HSI) was 27.4 and the Hurricane Wind Intensity Size Index (HWISI) was 43.9 .

Typhoon In-Fa will move through an environment favorable for intensification during the next 24 hours. In-Fa will move over water where the Sea Surface Temperatures are near 29°C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. Typhoon In-Fa has moved little during the past 12 hours and it has mixed cooler water to the surface. Once In-Fa starts to move a little faster, the core of the typhoon will move back over warmer water. Typhoon In-Fa is likely to strengthen during the next 24 hours and it could intensify to the equivalent of a major hurricane.

Typhoon In-Fa will move around the southwestern part of a high pressure system over the Western North Pacific Ocean during the next 36 hours. The high will steer In-Fa toward the northwest. On its anticipated track the center of Typhoon In-Fa will be near the southwestern Ryukyu Islands in 18 hours. In-Fa will be capable of causing widespread serious damage. It will also cause a significant storm surge. Typhoon In-Fa will drop heavy rain and flash floods are likely. The core of In-Fa could be northeast of Taiwan in 36 hours. In-Fa will also drop heavy rain on parts of northern Taiwan and flash floods are likely there as well.

Elsewhere, Tropical Depression Cempaka continued to meander over southern China. At 11:00 a.m. EDT on Thursday the center of Tropical Depression Cempaka was located at latitude 21.9°N and longitude 107.8°E which put it about 25 miles (40 km) north of Mong Cai, Vietnam. Cempaka was moving toward the northwest at 7 m.p.h. (11 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.

Typhoon In-Fa Moves Toward Southwestern Ryukyu Islands

Typhoon In-Fa moved toward the southwestern Ryukyu Islands on Wednesday. At 11:00 a.m. EDT on Wednesday the center of Typhoon In-Fa was located at latitude 23.9°N and longitude 126.5°E which put it about 155 miles (250 km) east-southeast of Ishigaki, Japan. In-Fa was moving toward the west-southwest at 7 m.p.h. (11 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 951 mb.

Typhoon In-Fa moved closer to the southwestern Ryukyu Islands on Wednesday. In-Fa was a large, powerful typhoon. A circular eye with a diameter of 30 miles (50 km) was at the center of Typhoon In-Fa. The eye was nearly surrounded by a ring of thunderstorms and the strongest winds were occurring in that ring of storms. There was a break in the eastern side of the ring around the eye. Bands of showers and thunderstorms were revolving around the core of Typhoon In-Fa. Storms near the core generated upper level divergence that pumped mass away from the typhoon.

The circulation around Typhoon In-Fa was large. Winds to typhoon force extended out 80 miles (130 km) from the center of In-Fa. Winds to tropical storm force extended out 250 miles (400 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon In-Fa was 19.2. The Hurricane Size Index (HSI) was 25.1 and the Hurricane Wind Intensity Size Index (HWISI) was 44.3.

Typhoon In-Fa will move through an environment favorable for intensification during the next 24 hours. In-Fa 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 In-Fa is likely to strengthen to the equivalent of a major hurricane during the next 24 hours.

Typhoon In-Fa will move around the southwestern part of a high pressure system over the Western North Pacific Ocean during the next 36 hours. The high will steer In-Fa toward the west. On its anticipated track the center of Typhoon In-Fa will be near the southwestern Ryukyu Islands in 36 hours. In-Fa will be capable of causing widespread major damage. It will also cause a significant storm surge. Typhoon In-Fa will drop heavy rain and flash floods are likely. The core of In-Fa could be northeast of Taiwan in 60 hours. In-Fa will also drop heavy rain on parts of Taiwan and flash floods are likely there as well.

Elsewhere, Tropical Depression Cempaka was moving over southern China. At 11:00 a.m. EDT on Wednesday the center of Tropical Depression Cempaka was located at latitude 22.5°N and longitude 110.3°E which put it about 5 miles (10 km) east of Yulin, China. Cempaka was moving toward the northwest at 6 m.p.h. (10 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.

Typhoon Cempaka Makes Landfall in Southern China

Typhoon Cempaka made landfall in southern China on Tuesday. At 11:00 p.m. EDT on Tuesday the center of Typhoon Cempaka was located at latitude 21.8°N and longitude 111.9°E which put it about 10 miles (15 km) south of Yangjiang, China. Cempaka was moving toward the northwest at 5 m.p.h. (8 km/h). The maximum sustained wind speed was 85 m.p.h. (135 km/h) and there were wind gusts to 105 m.p.h. (165 km/h). The minimum surface pressure was 972 mb.

Typhoon Cempaka made landfall on the coast of southern China just to the south of Yangjiang in the province of Guangdong on Tuesday. Cempaka brought strong winds and locally heavy rain to the southwestern part of Guangdong. Winds to typhoon force extended out 25 miles (40 km) from the center of Cempaka at the time of landfall. Winds to tropical storm force extended out 100 miles (160 km) from the center of circulation.

Typhoon Cempaka will weaken rapidly as the center moves inland. However, since Cempaka will move slowly, it could drop heavy rain over the southwestern part of Guangdong province. Heavy rain could cause flash floods in some locations.

Elsewhere over the Western North Pacific Ocean, former Tropical Storm In-Fa intensified to a typhoon south-southeast of Okinawa. At 11:00 a.m. EDT on Tuesday the center of Typhoon In-Fa was located at latitude 24.5°N and longitude 128.7°E which put it about 150 miles (245 km) south-southeast of Okinawa. In-Fa was moving toward the west at 7 m.p.h. (11 km/h). The maximum sustained wind speed was 85 m.p.h. (135 km/h) and there were wind gusts to 105 m.p.h. (165 km/h). The minimum surface pressure was 968 mb. Typhoon In-Fa is forecast to move toward the west during the next several days and to intensify to the equivalent of a major hurricane. The center of In-Fa will pass south of Okinawa during the next 24 hours. It could be over the southwestern Ryukyu Islands in 48 hours and near northern Taiwan in three days.

Cempaka Strengthens to a Typhoon Southwest of Hong Kong

Former Tropical Storm Cempaka strengthened to a typhoon southwest of Hong Kong on Monday. At 5:00 p.m. EDT on Monday the center of Typhoon Cempaka was located at latitude 21.3°N and longitude 112.4°E which put it about 130 miles (210 km) southwest of Hong Kong. Cempaka was moving toward the west-northwest at 3 m.p.h. (5 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 978 mb.

The small circulation around former Tropical Storm Cempaka strengthened quickly on Monday. A small circular eye formed at the center of Typhoon Cempaka. The eye was surrounded by a ring of strong thunderstorms. Bands of showers and thunderstorms were revolving around the core of Cempaka. 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) from the center of Cempaka. Winds to tropical storm force extended out 40 miles (65 km) from the center of circulation.

Typhoon Cempaka will move through an environment favorable for intensification during the next 12 hours. Cempaka will move over water where the Sea Surface Temperatures are near 30°C. It will remain under an upper level ridge over the South China Sea. The winds are weak in the ridge and there will be little vertical wind shear. Typhoon Cempaka could intensify during the next 12 hours.

Typhoon Cempaka will move south of a surface high pressure system over eastern China. The high pressure system will steer Cempaka slowly toward the west-northwest during the next 36 hours. On its anticipated track Tropical Storm Cempaka could approach the south coast of China near Yangjiang in about 12 hours. Cempaka will bring strong winds and heavy rain to the coast of Guangdong province. Since Cempaka will move very slowly some locations could receive extremely heavy rainfall and flash floods are likely in those places. Typhoon Cempaka could also produce of storm surge of up to 7 feet (2 meters) along parts of the coast where the wind blows the water toward the shore.

Elsewhere over the Western North Pacific Ocean, Tropical Storm In-Fa stalled southeast of Okinawa. At 5:00 p.m. EDT on Monday the center of Tropical Storm In-Fa was located at latitude 24.3°N and longitude 130.9°E which put it about 265 miles (425 km) southeast of Okinawa. In-Fa was moving toward the west-northwest at 4 m.p.h. (6 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 983 mb. Tropical Storm In-Fa is forecast to move toward the west during the next several days and to intensify to a typhoon. In-Fa could be south of Okinawa in 30 hours. It could be over the southwestern Ryukyu Islands in 72 hours and near northern Taiwan in less than four days.

Tropical Storm Cempaka Forms Southwest of Hong Kong

Tropical Storm Cempaka formed southwest of Hong Kong on Sunday evening. At 11:00 p.m. EDT on Sunday the center of Tropical Storm Cempaka was located at latitude 21.0°N and longitude 113.0°E which put it about 120 miles (195 km) southwest of Hong Kong. Cempaka was moving toward the west-northwest at 3 m.p.h. (5 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 991 mb.

The circulation around a small low pressure system organized quickly on Sunday evening and the Japan Meteorological Agency designated the system as Tropical Storm Cempaka. The inner end of a rainband wrapped most of the way around the center of Cempaka and an eye appeared to be forming in the middle of the tropical storm. Bands of showers and thunderstorms were revolving around the center of Tropical Storm Cempaka. Storm near the center of circulation generated upper level divergence that pumped mass away from the tropical storm. Winds to tropical storm force extended out 40 miles from the center of Cempaka.

Tropical Storm Cempaka will move through an environment favorable for intensification during the next 24 hours. Cempaka will move over water where the Sea Surface Temperatures are near 30°C during the next 24 hours. It will move under an upper level ridge over the South China Sea. The winds are weak in the ridge and there will be little vertical wind shear. Tropical Storm Cempaka will intensify during the next 24 hours and there is a chance it could strengthen to a typhoon.

Tropical Storm Cempaka will move south of a surface high pressure system over eastern China. The high pressure system will steer Cempaka slowly toward the west-northwest during the next 36 hours. On its anticipated track Tropical Storm Cempaka could approach the south coast of China near Yangjiang in about 24 hours. Cempaka could be a typhoon when it approaches the coast. It will bring gusty winds and heavy rain to the coast of Guangdong province. Cempaka could also produce of storm surge of up to 7 feet (2 meters) along parts of the coast where the wind blows the water toward the shore.

Elsewhere over the Western North Pacific Ocean, Tropical Storm In-Fa strengthened southeast of Okinawa. At 11:00 p.m. EDT on Sunday the center of Tropical Storm In-Fa was located at latitude 24.1°N and longitude 131.3°E which put it about 290 miles (465 km) southeast of Okinawa. In-Fa was moving toward the north-northwest at 8 m.p.h. (13 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 986 mb. Tropical Storm In-Fa is forecast to move toward the west during the next several days and to intensify to a typhoon. In-Fa could be south of Okinawa in 36 hours. It could be over the southwestern Ryukyu Islands in three days and near northern Taiwan in four days.

Typhoon Maysak Brings Wind and Rain to South Korea

Typhoon Maysak brought wind and rain to South Korea on Wednesday.  At 5:00 p.m. EDT on Wednesday the center of Typhoon Maysak was located at latitude 36.9°N and longitude 128.9°E which put it about 30 miles (50 km) north-northwest of Busan, South Korea.  Maysak was moving toward the north-northeast at 30 m.p.h. (50 km/h).  The maximum sustained wind speed was 85 m.p.h. (135 km/h) and there were wind gusts to 105 m.p.h. (165 km/h).  The minimum surface pressure was 950 mb.

The center of Typhoon Maysak made landfall on the south coast of South Korea west of Busan on Wednesday.  The large circulation around Maysak brought gusty winds and heavy rain to much of the Korean Peninsula.  Winds to typhoon force extended out 60 miles (95 km) from the center of circulation.  Winds to tropical storm force extended out 200 miles (320 km) from the center.  The heavy rain was falling on ground that was saturated by previous tropical cyclones and other weather systems.  The rain will likely cause widespread flash flooding.

Typhoon Maysak was being steered quickly toward the north by an upper level trough over eastern Asia.  On its anticipated track the center of Maysak will move along the east coast of the Korean Peninsula.  Typhoon Maysak will weaken and it will made a transition to an extratropical cyclone during the next 24 hours.

Elsewhere over the Western North Pacific Ocean, Typhoon Haishen strengthened south of Iwo To.  At 5:00 p.m. EDT on Wednesday the center of Typhoon Haishen was located at latitude 20.3°N and longitude 138.8°E which put it about 350 miles (560 km) south-southwest of Iwo To.  Haishen was moving toward the west-northwest at 13 m.p.h. (20 km/h).  The maximum sustained wind speed was 85 m.p.h. (135 km/h) and there were wind gusts to 105 m.p.h. (165 km/h).  The minimum surface pressure was 979 mb.

Typhoon Haishen will move through an environment favorable for intensification during the next 36 to 48 hours.  Haishen 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.  Typhoon Haishen will continue to intensify and it is likely to strengthen into the equivalent of a major hurricane.

Typhoon Haishen will move around the western end of a subtropical high pressure system over the Western North Pacific Ocean.  The high will steer Haishen toward the northwest during the next several days.  On its anticipated track Typhoon Haishen could approach the northern Ryukyu Islands in about 72 hours.  Haishen could eventually bring wind and rain to the same areas in Kyushu and South Korea affected by Typhoon Maysak.

Large Typhoon Maysak Churns Toward South Korea

Large, powerful Typhoon Maysak churned toward South Korea on Tuesday.  At 5:00 p.m. EDT on Tuesday the center of Typhoon Maysak was located at latitude 30.1°N and longitude 126.9°E which put it about 405 miles (655 km) south-southwest of Busan, South Korea.  Maysak was moving toward the north-northeast at 13 m.p.h. (20 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 932 mb.

Typhoon Maysak neared the completion of an eyewall replacement cycle on Tuesday which resulted in an increase in the size of the circulation.  The original inner eyewall had not quite dissipated, but low level convergence was focused on the much larger outer eyewall.  Winds to typhoon force extended out 90 miles (145 km) from the center of circulation.  Winds to tropical storm force extended out 240 miles (390 km) from the center of Maysak.

Typhoon Maysak was a large, dangerous tropical cyclone.  The Hurricane Intensity Index (HII) was 25.1.  The Hurricane Size Index (HSI) was 27.5 and the Hurricane Wind Intensity Size Index (HWISI) was 52.6.  Typhoon Maysak was capable of causing widespread major damage.

Since Typhoon Maysak was near the end of an eyewall replacement cycle, it will likely weaken slowly during the next 18 hours.  Maysak will move over water where the Sea Surface Temperature is near 28°C.  An upper level trough over eastern Asia will approach Typhoon Maysak on Wednesday.  The trough will produce southwesterly winds which will blow toward the top of the circulation.  Those winds will cause more vertical wind shear and the shear will cause Typhoon Maysak to weaken more quickly.

Typhoon Maysak will move around the western end of a subtropical high pressure system over the Western North Pacific Ocean.  The high will steer Maysak toward the north during the next 24 hours.  On its anticipated track the core of Typhoon Maysak is likely to pass west of Kyushu.  Maysak could reach South Korea in about 18 hours.  Typhoon Maysak could be the equivalent of a large, major hurricane when it gets to South Korea.  Maysak will produce very strong winds over South Korea.  It will also drop heavy rain and flash floods could occur.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Haishen strengthened south of Iwo To.  At 5:00 p.m. EDT on Tuesday the center of Tropical Storm Haishen was located at latitude 20.1°N and longitude 142.8°E which put it about 340 miles (545 km) south-southeast of Iwo To.  Haishen was moving toward the west-southwest at 8 m.p.h. (13 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 1000 mb.  Tropical Storm Haishen is forecast to strengthen into a typhoon and it could move toward western Japan later this week.

Typhoon Maysak Brings Wind and Rain to the Ryukyu Islands

Typhoon Maysak brought winds and rain to the Ryukyu Islands on Monday.  At 11:00 p.m. EDT on Monday the center of Typhoon Maysak was located at latitude 27.5°N and longitude 126.5°E which put it about 110 miles (175 km) west-northwest of Kadena AFB, Okinawa.  Maysak was moving toward the north-northwest at 13 m.p.h. (20 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 932 mb.

The eye and eyewall of Typhoon Maysak passed west of Okinawa on Monday.  Rainbands on the eastern side of Maysak passed over Okinawa and some of the other southern Ryukyu Islands.  A weather station at Naha reported a sustained wind speed of 58 m.p.h. (93 km/h).  A station at Kitahari (Kumejima Airport), which was closer to the center of Typhoon Maysak reported a sustained wind speed of 89 m.p.h. (144 km/h).

Satellite and radar images suggest that concentric eyewalls may have formed at the core of Typhoon Maysak.  The inner eye had a diameter of 8 miles (13 km).  A much larger outer eye with a diameter of approximately 100 miles (160 km) surrounded the inner eye.  Bands of showers and thunderstorms were revolving around the large core of Maysak.  Storms near the core were generating upper level divergence which was pumping mass away from the typhoon.

The circulation around Typhoon Maysak was large.  Winds to typhoon force extended out 70 miles (110 km) from the center of circulation.  Winds to tropical storm force extended out 200 miles (320 km) from the center.  The Hurricane Intensity Index (HII) for Typhoon Maysak was 25.1.  The Hurricane Size Index (HSI) was 25.5 and the Hurricane Wind Intensity Size Index (HWISI).  Maysak was capable of causing widespread major damage.

Typhoon Maysak will move through an environment capable of supporting a strong typhoon during the next 24 hours, but it has likely reached its peak intensity.  The formation of concentric eyewalls normally results in a weaker, but larger tropical cyclone.  The wind speed will decrease when the inner eyewall dissipates.  When that occurs, the maximum wind speeds will occur in the larger outer eyewall.  Since Maysak will move over water where the Sea Surface Temperature is near 29°C, it will remain a typhoon for another 24 to 36 hours.

Typhoon Maysak will move around the western end of a subtropical high pressure system over the Western North Pacific Ocean.  The high will steer Maysak toward the north during the next 36 hours.  On its anticipated track the center of Typhoon Maysak will pass west of Kyushu.  Typhoon Maysak could reach South Korea in 36 hours

Elsewhere over the Western North Pacific Ocean, Tropical Depression 11W was passing southeast of Iwo To.  At 11:00 p.m. EDT on Monday the center of Tropical Depression 11W was located at latitude 21.7°N and longitude 144.2°E which put it about 290 miles (470 km) southeast of Iwo To.  The depression was moving toward the west-southwest at 8 m.p.h. (13 km/h).  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 1006 mb.

Typhoon Maysak Strengthens to Equivalent of Major Hurricane Near Okinawa

Typhoon Maysak strengthened to the equivalent of a major hurricane near Okinawa on Monday.  At 11:00 a.m. EDT on Monday the center of Typhoon Maysak was located at latitude 25.5°N and longitude 127.0°E which put it about 110 miles (180 km) south-southwest of Kadena AFB, Okinawa.  Maysak was moving toward the north-northwest at 12 m.p.h. (19 km/h).  The maximum sustained wind speed was 125 m.p.h. (200 km/h) and there were wind gusts to 155 m.p.h. (250 km/h).  The minimum surface pressure was 936 mb.

Typhoon Maysak strengthened to the equivalent of a major hurricane on Monday as it approached Okinawa.  A circular eye with a diameter of 30 miles (50 km) was at the center of Maysak.  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 Maysak.  Storms near the core were generating upper level divergence which was pumping mass away from the typhoon.

Typhoon Maysak had a large circulation.  Winds to typhoon force extended out 70 miles (110 km) from the center of Maysak.  Winds to tropical storm force extended out 200 miles (320 km) from the center.  The Hurricane Intensity Index (HII) for Typhoon Maysak was 23.6.  The Hurricane Size Index (HSI) was 24.1 and the Hurricane Wind Intensity Size Index (HWISI) was 47.7.  Typhoon Maysak was capable of causing widespread major damage.

Typhoon Maysak will move through an environment favorable for intensification during the next 12 to 24 hours.  Maysak 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.  Typhoon Maysak could strengthen further and it could intensify into the equivalent of a Category 4 hurricane on the Saffir-Simpson Scale.

Typhoon Maysak will move around the western end of a subtropical high pressure system over the Western North Pacific Ocean.  The high will steer Maysak toward the north during the next several days.  On its anticipated track the center of Typhoon Maysak will pass west of Okinawa during the next few hours.  Maysak will bring strong winds and heavy rain to Okinawa.  Typhoon Maysak could approach South Korea in about 48 hours.

Elsewhere over the Western North Pacific Ocean, Tropical Depression 11W formed east-southeast of Iwo To.  At 11:00 a.m. EDT on Monday the center of Tropical Depression 11W was located at latitude 25.5°N and longitude 127.0°E which put it about 315 miles (515 km) east-southeast of Iwo To.  the depression was moving toward the southwest at 14 m.p.h. (22 km/h).  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 1008 mb.

Maysak Intensifies into a Typhoon East of Luzon

Former Tropical Storm Maysak intensified into a typhoon on Saturday.  At 5:00 p.m. EDT on Saturday the center of Typhoon Maysak was located at latitude 17.2°N and longitude 128.7°E which put it about 335 miles (540 km) east of Luzon.  Maysak was moving toward the west-northwest at 4 m.p.h. (6 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 976 mb.

The circulation around Typhoon Maysak exhibited greater organization on Saturday.  The inner end of a rainband wrapped partially around the center of circulation and an eye could be forming at the center of Maysak.  Bands of showers and thunderstorms were revolving around the core of Maysak.  Storms near the core were generating upper level divergence which was pumping mass away from the core.  Winds to typhoon force extended out 30 miles (50 km) from the center of circulation.  Winds to tropical storm force extended out 185 miles (295 km) from the center.

Typhoon Maysak will move through an environment favorable for intensification during the next 36 to 48 hours.  Maysak will move over water where the Sea Surface Temperature is near 30°C.  It will move through a region where the upper level winds will be weak and there will be little vertical wind shear.  Typhoon Maysak will continue to strengthen and it could intensify rapidly when an eye and eyewall are fully formed.  Maysak could strengthen into the equivalent of a major hurricane within 24 to 36 hours.

Typhoon Maysak will move around the western end of a subtropical high pressure system over the Western North Pacific Ocean.  The high will steer Maysak toward the north during the next several days.  On its anticipated track Typhoon Maysak will move toward the southern Ryukyu Islands.  Maysak could pass near Okinawa in about 48 hours.  Typhoon Maysak is likely to be the equivalent of a major hurricane when it passes near Okinawa.