Tag Archives: 06W

Tropical Storm Khanun Spins East of the Philippines

Tropical Khanun was spinning east of the Philippines on Friday. At 5:00 p.m. EDT on Friday the center of Tropical Storm Khanun was located at latitude 16.0°N and longitude 134.4°E which put it about 870 miles (1405 km) south-southeast of Okinawa. Khanun was moving toward the northwest at 13 m.p.h. (20 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 996 mb.

Tropical Storm Khanun gradually became more organized as it spun east of the Philippines on Friday. The distribution of thunderstorms in Khanun’s circulation was asymmetrical. Many of the thunderstorms were occurring in bands in the southern half of Tropical Storm Khanun. The strongest winds were occurring in those rainbands. Winds to tropical storm force extended out 200 miles (320 km) in the southern side of Khanun. Bands in the northern half of Khanun consisted primarily of showers and lower clouds. The winds in the northern side of Tropical Storm Khanun were blowing at less than tropical storm force. Storms near the center of Khanun’s circulation generated upper level divergence that pumped mass away to the south of the tropical storm.

Tropical Storm Khanun will move through an environment that will be somewhat favorable for intensification during the next 24 hours. Khanun will move over water where the Sea Surface Temperatures are near 30˚C. It will move under the eastern side of an upper level ridge over eastern China. The ridge will produce northerly winds that will blow toward the top of Khanun’s circulation. Those winds will cause moderate vertical wind shear. The wind shear will inhibit intensification. Tropical Storm Khanun is likely to intensify gradually during the next 24 hours.

Tropical Storm Khanun will move around the southwestern side of a subtropical high pressure system over the Western North Pacific Ocean. The high pressure system will steer Khanun toward the northwest during the next 24 hours. On its anticipated track, Tropical Storm Khanun will move toward the Ryukyu Islands. Khanun could approach Okinawa in less than 72 hours.

Elsewhere, Tropical Storm Doksuri weakened as it moved farther inland over eastern China. Doksuri was still dropping heavy rain over parts of eastern China. At 2:00 p.m. EDT on Thursday the center of Tropical Storm Doksuri was located at latitude 28.9°N and longitude 117.0°E which put it about 25 miles (40 km) south of Jingdezhen, China. Doksuri was moving toward the north-northwest at 18 m.p.h. (30 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 996 mb.

Typhoon Doksuri Hits Eastern China

Typhoon Doksuri hit eastern China on Thursday night. At 11:00 p.m. EDT on Thursday the center of Typhoon Doksuri was located at latitude 24.8°N and longitude 118.5°E which put it about 35 miles (55 km) northeast of Xiamen, China. Doksuri was moving toward the north-northwest 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 940 mb.

The center of Typhoon Doksuri made landfall on the east coast of China between Xiamen and Quanzhou on Thursday night. Doksuri was bringing strong winds and heavy rain to Fujian. Winds to typhoon force extended out 40 miles (65 km) from the center of Doksuri’s circulation. Winds to tropical storm force extended out 140 miles (225 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Doksuri was 19.2. The Hurricane Size Index (HSI) was 13.6 and the Hurricane Wind Intensity Size Index (HWISI) was 32.8. Typhoon Doksuri was similar in size and intensity to Hurricane Sally when Sally hit Alabama in 2020.

Typhoon Doksuri will continue to move toward the north-northwest during the next 36 hours. On its anticipated track, Typhoon Doksuri will move inland over eastern China. Doksuri will weaken as it moves inland. The core of Typhoon Doksuri will bring strong winds to Fujian. Doksuri will also drop heavy rain over parts of Fujian. Heavy rain could cause flash floods in some locations. Doksuri will bring gusty winds and locally heavy rain to parts of Zhejiang and Jiangxi.

Elsewhere over the Western North Pacific Ocean, former Tropical Depression 06W strengthened to Tropical Storm Khanun east of the Philippines. At 11:00 p.m. EDT on Thursday the center of Tropical Storm Khanun was located at latitude 13.4°N and longitude 135.7°E which put it about 1060 miles (1710 km) south-southeast of Okinawa. Khanun was moving toward the west at 10 m.p.h. (16 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 1001 mb. Tropical Storm Khanun is forecast to move toward the Ryukyu Islands and to strengthen to a typhoon.

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 Champi Brings Wind and Rain to Iwo To

Typhoon Champi brought wind and rain to Iwo To on Friday night. At 11:00 p.m. EDT on Friday the center of Typhoon Champi was located at latitude 25.4°N and longitude 139.9°E which put it about 105 miles (165 km) west of Iwo To. Champi was moving toward the north at 13 m.p.h. (20 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 982 mb.

Bands of showers and thunderstorms on the eastern side of Typhoon Champi brought wind and rain to Iwo To on Friday night. Although the center of Champi was passing west of Iwo To, the circulation around the typhoon was producing gusty winds and rain over the island. The core of Typhoon Champi was passing west of Iwo To. Winds to typhoon force extended out 25 miles (40 km) from the center of Champi. However, winds to tropical storm force extended out 100 miles (160 km) from the center of circulation.

Typhoon Champi will move through an environment unfavorable for intensification during the next several days. Champi will move over water where the Sea Surface Temperatures are near 27°C. It will move under the southeastern part of an upper level trough over Japan. The trough will produce southwesterly winds which will blow toward the top of the typhoon. Those winds will cause moderate vertical wind shear. The wind shear will inhibit intensification, but Typhoon Champi could maintain its intensity during the next 12 hours. The vertical wind shear will increase on Saturday, when Champi moves closer to the upper level trough. Typhoon Champi will weaken when the shear increases. Champi will also move over cooler water by Sunday.

The upper level trough over Japan will steer Typhoon Champi toward the northeast during the weekend. On its anticipated track Champi will move away from Iwo To on Saturday. Typhoon Champi could be southeast of Tokyo in 30 hours.

Champi Strengthens to a Typhoon Southwest of Iwo To

Former Tropical Storm Chanpi strengthened to a typhoon southwest of Iwo To on Friday morning. At 5:00 a.m. EDT on Friday the center of Typhoon Champi was located at latitude 22.5°N and longitude 139.2°E which put it about 230 miles (370 km) southwest of Iwo To. Champi was moving toward the north at 11 m.p.h. (17 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 982 mb.

The circulation around Typhoon Champi exhibited better organization on Friday morning. There was a small, circular eye at the center of Champi. 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 Champi. The strongest rainband wrapped around the northern, western and southern sides of Champi. Bands in the eastern side of the typhoon consisted mainly of showers and lower clouds. The circulation around Typhoon Champi was relatively small. Winds to typhoon force extended out 30 miles (50 km) from the center of Champi. Winds to tropical storm force extended out 100 miles (160 km) from the center of circulation.

Typhoon Champi will move through an environment somewhat favorable for intensification during the next 24 hours. Champi will move over water where the Sea Surface Temperatures are near 29°C. It will move under the southeastern part of an upper level trough over Japan. The trough will produce southwesterly winds which will blow toward the top of the typhoon. Those winds will cause some vertical wind shear. The wind shear will inhibit intensification, but Typhoon Champi could strengthen during the next 24 hours. The vertical wind shear will increase during the weekend, when Champi moves closer to the upper level trough.

Typhoon Champi will move around the western end of a surface high pressure system during the next 24 hours. The high will steer Champi toward the north during that time period. On its anticipated track the center of Typhoon Champi will pass west of Iwo To on Friday night. Bands on the eastern side of Champi could bring gusty winds and locally heavy rain to Iwo To. The upper level trough over Japan will steer Typhoon Champi toward the northeast during the weekend. Champi could be southeast of Tokyo in 48 hours.

Tropical Storm Champi Strengthens South of Iwo To

Tropical Storm Champi strengthened south of Iwo To on Wednesday. At 11:00 p.m. EDT on Wednesday the center of Tropical Storm Champi was located at latitude 18.9°N and longitude 140.1°E which put it about 435 miles (680 km) south of Iwo To. Champi was moving toward the north at 6 m.p.h. (10 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 992 mb.

Tropical Storm Champi continued to strengthen on Wednesday. The inner end of a rainband wrapped most of the way around the center of Champi. Stronger thunderstorms were occurring in bands east and south of the center of circulation. Bands in the northwestern side of the tropical storm consisted primarily of showers and lower clouds. Storms near the center of circulation generated upper level divergence that pumped mass away from the tropical storm. Winds to tropical storm force extended out 70 miles (110 km) from the center of Champi.

Tropical Storm Champi will move through an environment favorable for intensification during the next 36 hours. Champi will move over an area where the Sea Surface Temperatures are near 29°C. It will move under the southeastern portion of an upper level ridge centered east of the Philippines. The ridge will produce northeasterly winds that will blow toward the top of the tropical storm. Those winds will cause some vertical wind shear. The vertical wind shear will slow the rate of intensification, but it will not be large enough prevent Tropical Storm Champi from strengthening. Champi will intensify during the next 36 hours and it is forecast to strengthen to a typhoon.

Tropical Storm Champi will move around the western end of a subtropical high pressure system over the Western North Pacific Ocean during the next 48 hours. The high will steer Champi toward the north during the next two days. On its anticipated track Tropical Storm Champi could be southwest of Iwo To in 36 hours.

Tropical Storm Champi Develops West of the Marianas

Tropical Storm Champi developed west of the Marianas on Tuesday night. At 11:00 p.m. EDT on Tuesday the center of Tropical Storm Champi was located at latitude 15.3°N and longitude 139.9°E which put it about 320 miles (515 km) west-northwest of Guam. Champi was moving toward the west-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 1000 mb.

The circulation around former Tropical Depression 06W strengthened on Tuesday night and the Japan Meteorological Agency designated the system as Tropical Storm Champi. More thunderstorms formed near the center of Tropical Storm Champi. The inner end of a rainband wrapped around the eastern and northern sides of the center of Champi. Other bands of showers and thunderstorms were revolving around the center of circulation. Storms near the center generated upper level divergence that pumped mass away from the tropical storm. Winds to tropical storm force extended out 50 miles (80 km) from the center of circulation.

Tropical Storm Champi will move through an environment favorable for intensification during the next 48 hours. Champi will move over an area where the Sea Surface Temperatures are near 29°C. It will move between an upper level low northeast of the Marianas and and upper level ridge over eastern Asia. The upper level winds are weak between the upper low and the ridge and there will be little vertical wind shear. Tropical Storm Champi will intensify during the next 48 hours and it could strengthen to a typhoon.

Tropical Storm Champi will move around the western end of a subtropical high pressure system over the Western North Pacific Ocean during the next 48 hours. The high will steer Champi toward the north during the next several days. On its anticipated track Tropical Storm Champi could be southwest of Iwo To in 48 hours.

Tropical Depression Forms Southeast of Guam, Warning Issued

Tropical Depression 06W formed southeast of Guam on Sunday night and a Tropical Storm Warning was issued for Guam. At 5:00 a.m. EDT on Monday the center of Tropical Depression 06W was located at latitude 12.1°N and longitude 146.0°E which put it about 160 miles (260 km) southeast of Guam. Tropical Depression 06W was moving toward the west-northwest at 13 m.p.h. (20 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 1000 mb.

A Tropical Storm Warning was issued for Guam. A Tropical Storm Watch was issued for Rota.

A circulation center developed in a cluster of thunderstorms southeast of Guam on Sunday night and the Joint Typhoon Warning Center designated the system as Tropical Depression 06W. The distribution of thunderstorms around Tropical Depression 06W was asymmetrical. The strongest thunderstorms were occurring in bands on the eastern side of the tropical depression. Bands in the western half of the circulation consisted primarily of showers and lower clouds. Storms near the center of Tropical Depression 06W began to generate upper level divergence that pumped mass away from the tropical depression.

Tropical Depression 06W will move through an environment that is somewhat favorable for intensification during the next several days. The depression will move over an area where the Sea Surface Temperatures are near 29°C. It will move south of an upper level ridge over the Western North Pacific Ocean. The ridge will produce easterly winds that will blow toward the top of Tropical Depression 06W. Those winds will cause some vertical wind shear, but the shear will not be strong enough to prevent intensification. The tropical depression will move into an area where drier air is sinking toward the surface. The drier air will limit the formation of thunderstorms on the western side of the circulation and it will inhibit intensification. Tropical Depression 06W is forecast to intensify to a tropical storm during the next 24 hours.

Tropical Depression 06W will move around the western side of a subtropical high pressure system over the Western North Pacific Ocean. The high will steer the depression toward the northwest during the next 24 hours. On its anticipated track Tropical Depression 06W will pass near Guam in 12 hours. The tropical depression will bring gusty winds and heavy rain to parts of Guam. It will move more toward the north when it reaches the western end of the high pressure system.

Tropical Storm Erick Forms Over Eastern North Pacific

Tropical Storm Erick formed over the Eastern North Pacific Ocean on Saturday.  At 11:00 p.m. EDT on Saturday the center of Tropical Storm Erick was located at latitude 11.9°N and longitude 126.8°W which put it about 1955 miles (3145 km) east-southeast of Hilo, Hawaii.  Erick was moving toward the west 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 1005 mb.

More thunderstorms developed near the center of a low pressure system over the Eastern North Pacific Ocean and the National Hurricane Center designated the system as Tropical Storm Erick.  The circulation around Erick was still organizing.  A small cluster of thunderstorms formed near the center of circulation and the strongest winds were occurring in that cluster.  Winds to tropical storm force extended out about 25 miles (40 km) from the center of circulation.  Bands of showers and thunderstorms were developing and the bands were beginning to revolve around the center of Tropical Storm Erick.  Storms near the center of circulation were starting to generate upper level divergence which was pumping mass away from the tropical storm.

Tropical Storm Erick will move through an environment favorable for intensification during the next 48 to 72 hours.  Erick will move over water where the Sea Surface Temperature is near 27.5°C.  It will move through a region where the upper level winds are weak and there will be little vertical wind shear.  Tropical Storm Erick will strengthen and it could become a hurricane within 48 hours.  Erick could intensify more rapidly if an eye and eyewall form.

Tropical Storm Erick will move south of a subtropical high pressure system over the Eastern North Pacific Ocean.  The subtropical high will steer Erick toward the west-northwest during the next few days.  On its anticipated track Tropical Storm Erick could be southeast of Hawaii in four or five days.

Tropical Storm Danas Speeds Toward South Korea

Tropical Storm Danas sped toward South Korea on Friday as it moved quickly north-northeast over the East China Sea.  At 11:00 a.m. EDT on Friday the center of Tropical Storm Danas was located at latitude 32.3°N and longitude 125.1°E which put it about 190 miles (305 km) south-southwest of Mopko, South Korea.  Danas was moving toward the north-northeast at 19 m.p.h. (30 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 987 mb.

The distribution of thunderstorms around Tropical Storm Danas remained asymmetrical on Friday.  The strongest thunderstorms were occurring in bands well to the east of the center of circulation.  Bands closer to the center and on the western side of the circulation consisted primarily of showers and lower clouds.  An upper level trough over eastern China was producing southwesterly winds which were blowing toward the top of the circulation.  Those winds were causing moderate vertical wind shear and they were the reason for the asymmetrical distribution of thunderstorms.  The wind field also exhibited the effects of the wind shear.  Winds to tropical storm force extended out about 200 miles (320 km) from the center of Danas on the eastern side of the circulation, but only extended out about 120 miles (195 km) on the western side of the tropical storm.

Tropical Storm Danas will remain in an environment only marginally favorable for intensification until it makes landfall in South Korea.  Danas will move over water where the Sea Surface Temperature is near 30°C.  The upper level trough over eastern China will continue to cause moderate vertical wind shear.  Tropical Storm Danas could intensify a little during the next 12 hours, but it will weaken after the center moves over South Korea.

Tropical Storm Danas will move around the western end of a subtropical ridge over the western North Pacific Ocean.  The ridge and the upper level trough will interact to steer Danas rapidly toward the north-northeast.  On its anticipated track the center of Tropical Storm Danas will make landfall on the southwestern coast of South Korea in about 12 hours.  Danas will bring gusty winds and locally heavy rain to South Korea on Saturday.  The heaviest rain will fall over the southeastern half of South Korea.  Locally heavy rain in that region could cause flash floods.  The outer rainbands of Tropical Storm Danas could also drop locally heavy rain over western Kyushu.