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Typhoon Krathon Rapidly Intensifies to Equivalent of a Major Hurricane

Typhoon Krathon rapidly intensified to the equivalent of a major hurricane on Sunday.  At 5:00 p.m. EDT on Sunday the center of Typhoon Krathon was located at latitude 20.1°N and longitude 122.0°E which put the center about 200 miles (320 km) southeast of Kaohsiung, Taiwan.  Krathon was moving toward the west-northwest 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 950 mb.

Typhoon Krathon rapidly intensified to the equivalent of a major hurricane over the Western North Pacific Ocean south of Taiwan on Sunday.  A large circular eye with a diameter of 50 miles (80 km) was at the center of Krathon’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 Krathon.  Storms near the core of Krathon’s circulation generated upper level divergence that pumped large quatities of mass mass away from the typhoon.  The removal of large amounts of mass caused the surface pressure to decrease rapidly.

The size of the circulation around Typhoon Krathon increased as it intensified.  Winds to typhoon force extended out 60 miles (95 km) from the center of Krathon’s circulation.  Winds to tropical storm force extended out 265 miles (425 km) from the center of Typhoon Krathon.

The Hurricane Intensity Index (HII) for Typhoon Krathon was 22.1.  The Hurricane Size Index (HSI) was 23.1 and the Hurricane Wind Intensity Size Index (HWISI) was 45.2.  Typhoon Krathon was similar in size and intensity to Hurricane Jeanne when Jeanne hit southeast Florida in 2004.

Typhoon Krathon will move through an environment favorable for intensification during the next 24 hours.  Krathon will move over water where the Sea Surface Temperatures are near 30°C.  It will move under the axis of an upper level ridge south of Japan. The upper level winds are weak near the axis of the ridge and there will be little vertical wind shear, Typhoon Krathon will intensify during the next 24 hours.  Krathon could continue to intensify rapidly during the next few hours.  Typhoon Krathon is likely strengthen to a the equivalent of a major hurricane.

Typhoon Krathon will move around the southwestern part of a high pressure system south of Japan.  The high pressure system will steer Krathon toward the northwest during the next 24 hours.  On its anticipated track, Typhoon Krathon will move closer to Taiwan.  The center Krathon’s circulation will approach the southern end of Taiwan in 36 hours. Typhoon Krathon is will be the equivalent of a major hurricane when it approaches Taiwan.  Bands in the northern side of Krathon’s circulation will begin to bring wind and rain to Taiwan on Monday.

Elsewhere over the Western North Pacific Ocean, the center of Tropical Storm Jebi passed just to the west of Iwo To.  At 5:00 p.m. EDT on Sunday the center of Tropical Storm Jebi was located at latitude 25.8°N and longitude 140.7°E which put the center about 50 miles (80 km) west-northwest of Iwo To.  Jebi was moving toward the north at 6 m.p.h. (10 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 993 mb.

Tropical Storm Krathon Forms Southeast of Taiwan

Tropical Storm Krathon formed over the Western North Pacific Ocean southeast of Taiwan on Saturday.  At 11:00 a.m. EDT on Saturday the center of Tropical Storm Krathon was located at latitude 18.6°N and longitude 125.1°E which put the center about 480 miles (775 km) south-southeast of Taipei, Taiwan.  Krathon was moving toward the west at 4 m.p.h. (6 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 995 mb.

A low pressure system over the Western North Pacific Ocean southeast of Taiwan strengthened on Saturday and the Japan Meteorological Agency designated the system as Tropical Storm Krathon.  The circulation around Tropical Storm Krathon was organizing quickly on Saturday.  The inner end of a rainband wrapped around the eastern and northern sides of the center of Krathon’s circulation.  Other bands of showers and thunderstorms were revolving around the center of Tropical Storm Krathon.  Storms near the center of Krathon’s circulation generated upper level divergence that pumped mas away from the tropical storm.

The circulation around Tropical Storm Krathon was increasing size as Krathon strengthened.  Winds to tropical storm force extended out 125 miles (200 km) from the center of Krathon’s circulation.

Tropical Storm Krathon will move through an environment favorable for intensification.  Krathon will move over water where the Sea Surface Temperatures are near 30°C.  It will move under the axis of an upper level ridge south of Japan.  The upper level winds are weak near the axis of the ridge and there will be little vertical wind shear,  Tropical Storm Krathon will intensify during the next 24 hours.  Krathon could strengthen to a typhoon on Sunday.

Tropical Storm Krathon will move around the southwestern part of a high pressure system south of Japan.  The high pressure system will steer Krathon toward the northwest during the next 24 hours.  On its anticipated track, Tropical Storm Krathon will move closer to Taiwan.

Elsewhere over the Western North Pacific Ocean, Tropical Depression Jebi was moving closer to Iwo To.  At 11:00 a.m. EDT on Saturday the center of Tropical Storm Jebi was located at latitude 21.7°N and longitude 142.3°E which put the center about 275 miles (445 km) south-southeast of Iwo To.  Jebi was moving toward the north-northwest 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 1000 mb.

Tropical Storm Jebi Forms West of the Northern Marianas

Tropical Storm Jebi formed west of the Northern Marianas on Friday.  At 11:00 a.m. EDT on Friday the center of Tropical Storm Jebi was located at latitude 18.7°N and longitude 144.6°E which put the center about 60 miles (95 km) west-northwest of Agrihan. Jebi was moving toward the north-northwest at 4 m.p.h. (6 km/h).  The maximum sustained wind speed was 45 m.p.h. (65 km/h) and there were wind gusts to 60 m.p.h. (95 km/h).  The minimum surface pressure was 1001 mb.

A low pressure system west of the Northern Marianas strengthened on Friday and the Japan Meteorological Agency designated the system as Tropical Storm Jebi.  The circulation around Tropical Storm Jebi was poorly organized.  Thunderstorms were occurring in the southeastern quadrant of Jebi’s circulation.  There were no thunderstorms near the center of Tropical Storm Jebi.  Bands in the other parts of Jebi’s circulation consisted primarily of showers and lower clouds.

Tropical Storm Jebi will move through an environment somewhat favorable for intensification during the next 24 hours.  Jebi will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the southeastern part of an upper level ridge south of Japan.  The upper level ridge will produce northeasterly winds that will blow toward the top of Jebi’s circulation.  Those winds will cause moderate vertical wind shear.  The wind shear will inhibit intensification.  Tropical Storm Jebi could intensify a little during the next 24 hours, if the wind shear does not get any stronger.

Tropical Storm Jebi will move around the western side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Jebi toward the northwest during the next 24 hours.  On its anticipated track, Tropical Storm Jebi will move slowly away from the Northern Marianas.  Jebi could approach Iwo To in 36 hours.

Elsewhere over the Western North Pacific Ocean, Tropical Depression 20W formed south-southeast of Taiwan.  At 11:00 a.m. EDT on Friday the center of Tropical Depression 20W was located at latitude 19.6°N and longitude 125.8°E which put the center about 430 miles (690 km) south-southeast of Taipei, Taiwan.  The tropical depression was moving toward the southwest at 7 m.p.h. (11 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 1001 mb.

Tropical Storm Pulasan Brings Gusty Winds and Rain to Okinawa

Tropical Storm Pulasan brought gusty winds and rain to Okinawa on Wednesday.  At 5:00 p.m. EDT on Wednesday the center of Tropical Storm Pulasan was located at latitude 27.5°N and longitude 126.9°E which put the center about 35 miles (55 km) north of Okinawa.  Pulasan was moving toward the northwest at 15 m.p.h. (24 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 998 mb.

Tropical Storm Pulasan brought gusty winds and locally heavy rain to parts of Okinawa on Wednesday.  A weather station in Oku, Japan reported 5.04 inches (128 mm) of rain.  A weather station in Yoronjima Island reported 3.66 inches (93 mm) of rain.

The distribution of thunderstorms in Tropical Storm Pulasan was asymmetrical.  Thunderstorms were occurring in bands in the northern and eastern sides of Pulasan’s circulation.  Bands in the southern and western sides of Tropical Storm Pulasan consisted primarily of showers and lower clouds.

The distribution of wind speeds in Tropical Storm Pulasan was also asymmetrical.  Winds to tropical storm force extended out 320 miles (520 km) in the northwestern, northeastern and southeastern quadrants of Pulasan’s circulation.  The winds in the southwestern quadrant of Tropical Storm Pulasan were blowing at less than tropical storm force,

Tropical Storm Pulasan will move through an environment marginally favorable for intensification during the next 24 hours.  Pulasan will move over water where the Sea Surface Temperatures are near 30°C.  It will move under the northern side of a large upper level low centered southeast of China.  The upper level low will produce easterly winds that will blow toward the top of Pulasan’s circulation.  Those winds will cause strong vertical wind shear. The strong wind shear will inhibit intensification.  Tropical Storm Pulasan could maintain its intensity during the next 24 hours if the wind shear does not get any stronger.  Pulasan will weaken if the vertical wind shear increases.

Tropical Storm Pulasan will move around the northern side of a large counterclockwise circulation southeast of China that is sometimes called a monsoon gyre.  The large counterclockwise circulation will steer Pulasan quickly toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Pulasan will be near Shanghai, China in 24 hours.

Tropical Storm Pulasan will bring gusty winds and locally heavy rain to the region around Shanghai.  Flooding is still occurring from the recent passage of Typhoon Bebinca over the same area.  Additional heavy rain will make flooding worse.

 

Tropical Storm Pulasan Forms Southeast of Ryukyu Islands

Tropical Storm Pulasan formed over the Western North Pacific Ocean southeast of the Ryukyu Islands on Monday.  At 11:00 p.m. EDT on Monday the center of Tropical Storm Pulasan was located at latitude 19.3°N and longitude 137.8°E which put the center about 450 miles (725 km) south-southwest of Iwo To.  Pulasan was moving toward the west-northwest at 22 m.p.h. (35 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 997 mb.

The circulation around Tropical Storm Pulasan was very large, but there were not many thunderstorms present.  Bands revolving around the center of Pulasan’s circulation consisted primarily of showers and lower clouds.  Thunderstorms were occurring in a band in the far eastern periphery of Tropical Storm Pulasan.  Thunderstorms were also occurring in a band in the far southern periphery of Pulasan’s circulation.

The circulation around Tropical Storm Pulasan was very large, but the distribution of wind speeds was asymmetrical.  Winds to tropical storm force extended out 265 miles (425 km) in the eastern side of Pulasan’s circulation.  The winds in the western side of Tropical Storm Pulasan were blowing at less than tropical storm force.

Tropical Storm Pulasan will move through an environment marginally favorable for intensification during the next 24 hours.  Pulasan will move over water where the Sea Surface Temperatures are near 30°C.  It will move under the eastern side of a large upper level low centered east of Taiwan.  The upper level low will produce southwesterly winds that will blow toward the top of Pulasan’s circulation.  Those winds will cause strong vertical wind shear.  The strong wind shear will inhibit intensification.  Tropical Storm Pulasan could intensify a little during the next 24 hours if the wind shear does not get any stronger.

Tropical Storm Pulasan will move around the northern side of a large counterclockwise circulation sometimes called a monsoon gyre.  The large counterclockwise circulation will steer Pulasan quickly toward the west-northwest during the next 36 hours.  On its anticipated track Tropical Storm Pulasan will be near the Ryukyu Islands in 36 hours.

Tropical Storm Pulasan will bring gusty winds and locally heavy rain to the Ryukyu Islands.  Heavy rain could cause flash floods in some locations.

Elsewhere, former Typhoon Bebinca weakened to a tropical depression over eastern China.  At 11:00 p.m. EDT on Monday the center of Tropical Depression Bebinca was located at latitude 32.0°N and longitude 117.0°E which put the center about 100 miles (160 km) west of Nanjing, China.  Bebinca was moving toward the west-northwest at 12 m.p.h. (19 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 1004 mb.

Typhoon Bebinca Brings Wind and Rain to Ryukyu Islands

Typhoon Bebinca brought wind and rain to the Ryukyu Islands on Saturday.  At 11:00 a.m. EDT on Saturday the center of Typhoon Bebinca located at latitude 28.5°N and longitude 128.6°E which put the center about 65 miles (105 km) west-northeast of Amami Oshima.  Bebinca was moving toward the northwest at 15 m.p.h. (24 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 973 mb.

Former Tropical Storm Bebinca strengthened to a typhoon as it passed over the Ryukyu Islands on Saturday.  The center of Typhoon Bebinca passed over Amami Oshima.  A weather station in Naze, Japan reported 8.76 inches (222.5 mm) of rain.  A weather station in Kasari, Japan reported 4.80 inches (122.0 mm) of rain.  That weather station also reported a sustained wind speed of 52 m.p.h. (84 km/h).  A weather station in Koniya, Japan reported 3.33 inches (84.5 mm) of rain.  That weather station also reported a sustained wind speed of 39 m.p.h. (63 km/h).

Former Tropical Storm Bebinca strengthened to a typhoon on Saturday.  The inner end of a rainband wrapped around the eastern, northern and western sides of the center of Bebinca’s circulation.  Bands of showers and thunderstorms were revolving around the core of Typhoon Bebinca.  Storms near the core generated upper level divergence that pumped mass away from the typhoon.  The removal of mass caused the surface pressure to decrease.

The circulation around Typhoon Bebinca became more symmetrical on Saturday.  Winds to typhoon force extended out 30 miles (50 km) from the center of Bebinca’s circulation.  Winds to tropical storm force extended out 115 miles (185 km) from the center of Typhoon Bebinca.

Typhoon Bebinca will move through an environment favorable for intensification during the next 24 hours.  Bebinca will move over water where the Sea Surface Temperatures are near 30°C.  It will move under the axis of an upper level ridge east of China.  The upper level winds are weak near the axis of the ridge and there will be little vertical wind shear.  Typhoon Bebinca will intensify during the next 24 hours.  Bebinca could intensify rapidly at times.

Typhoon Bebinca will move around the southern side of a high pressure system that extends from China to the Western North Pacific Ocean.  The high pressure system will steer Bebinca toward the west-northwest during the next 24 hours.  On its anticipated track, Typhoon Bebinca will approach the east coast of China near Shanghai.

Typhoon Bebinca will bring strong winds and heavy rain to the region of China near Shanghai.  Typhoon Bebinca will bring strong winds and heavy rain to Jiangsu and Zhejiang.  Heavy rain is likely to cause flash floods in some locations.

Tropical Storm Bebinca Moves Toward Ryukyu Islands

Tropical Storm Bebinca moved over the Western North Pacific Ocean toward the Ryukyu Islands on Friday.  At 11:00 a.m. EDT on Friday the center of Tropical Storm Bebinca located at latitude 25.1°N and longitude 133.3°E which put the center about 405 miles (655 km) east-southeast of Okinawa.  Bebinca was moving toward the northwest at 25 m.p.h. (40 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 988 mb.

Tropical Storm Bebinca strengthened on Friday as it moved toward the Ryukyu Islands.  More thunderstorms formed near the center of Bebinca’s circulation.  Even though more thunderstorms formed near the center of Tropical Storm Bebinca, the distribution of thunderstorms was asymmetrical.  Thunderstorms were occurring in bands in the western side of Bebinca’s circulation.  Bands in the eastern side of Tropical Storm Bebinca consisted primarily of showers and lower clouds.  Storms near the center of Bebinca generated upper level divergence that pumped mass away from the tropical storm.

The distribution of wind speeds in Tropical Storm Bebinca was also asymmetrical.  Winds to tropical storm force extended out 160 miles (260 km) in the northern half of Bebinca’s circulation.  The winds in the southern half of Tropical Storm Bebinca were blowing at less than tropical storm force.

Tropical Storm Bebinca will move through an environment mostly favorable for intensification during the next 24 hours.  Bebinca will move over water where the Sea Surface Temperatures are near 30°C.   It will move under the northeastern part of an upper level low east of Taiwan.  The upper level low will produce southeasterly winds that will blow toward the top of Bebinca’s circulation.  Those winds will cause moderate vertical wind shear.  The wind shear will inhibit intensification, but the shear will not be enough prevent intensification.  Tropical Storm Bebinca will intensify during the next 24 hours.

Tropical Storm Bebinca will move around the northeastern part of a large low pressure system east of Taiwan.  The low pressure system will steer Bebinca toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Bebinca will reach the Ryukyu Islands in less than 24 hours.

Tropical Storm Bebinca could intensify to a typhoon before it reaches the Ryukyu Islands.  Bebinca will bring strong winds and heavy rain to Miniamidaitohima, Okinawa and Amami.  Heavy rain is likely to cause flash floods in some locations.

Tropical Storm Bebinca Forms Near Guam

Tropical Storm Bebinca formed near Guam on Tuesday.  At 5:00 p.m. EDT on Tuesday the center of Tropical Storm Bebinca located at latitude 13.6°N and longitude 144.0°E which put the center about 20 miles (30 km) southwest of Guam.  Bebinca was moving toward the west-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 999 mb.

Tropical Storm Warnings were in effect for the coastal waters of Guam, Rota, Tinian and Saipan.

A low pressure system near Guam strengthened on Tuesday and the Japan Meteorological Agency designated the system as Tropical Storm Bebinca.  Bebinca brought wind and rain to the Marianas.  A weather station at Guam International Airport (PGUM) reported a sustained wind speed of 28 m.p.h. (45 km/h) and a wind gust of 45 m.p.h. (73 km/h).

The circulation around Tropical Storm Bebinca was exhibiting more organization on Tuesday afternoon.  More thunderstorms developed near the center of Bebinca’s circulation.  Thunderstorms also formed in bands in the eastern side of Tropical Storm Bebinca.  Bands in the western side of Bebinca’s circulation consisted primarily of showers and lower clouds.  Storms near the center of Bebinca generated upper level divergence that pumped mass away from the tropical storm.  The removal of mass caused the pressure to decrease.

The distribution of winds speeds in Tropical Storm Bebinca was asymmetrical.  Winds to tropical storm force extended out 100 miles (160 km) in the northeastern quadrant of Bebinca’s circulation.  Winds to tropical storm force only extended out 25 miles (40 km) in the other parts of Tropical Storm Bebinca.

Tropical Storm Bebinca will move through an environment favorable for intensification during the next 24 hours.  Bebinca will move over water where the Sea Surface Temperatures are near 30°C.   It will move under the western part of an upper level ridge over the Western North Pacific Ocean.  The upper level ridge will produce southerly winds that will blow toward the top of Bebinca’s circulation.  Those winds will cause some vertical wind shear.  The wind shear will inhibit intensification, but the shear will not be enough to prevent intensification.  Tropical Storm Bebinca will intensify during the next 24 hours.  Bebinca is likely to strengthen to a typhoon later this week.

Tropical Storm Bebinca will move around the southwestern part of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Bebinca toward the northwest during the next 24 hours.  On its anticipated track, Tropical Storm Bebinca will move west of the Marianas.  Bebinca could approach the Ryukyu Islands by the end of the week.

Tropical Storm Shanshan Drops Heavy Rain on Japan

Tropical Storm Shanshan dropped heavy on parts of southwestern Japan on Thursday.  At 11:00 p.m. EDT on Thursday the center of Tropical Storm Shanshan was located at latitude 33.8°N and longitude 131.6°E which put the center about 20 miles (30 km) west of Matsuyama, Japan.  Shanshan was moving toward the east-northeast at 3 m.p.h. (5 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 990 mb.

Former Typhoon Shanshan weakened to a tropical storm as it moved across Kyushu on Thursday.  Bands in the eastern side of Tropical Storm Shanshan dropped heavy rain on parts of Kyushu, Shikoku and southwestern Honshu.  The heaviest rain fell in locations where southerly winds pushed air up the slopes of mountains.  A weather station in Yosuhara reported 16.37 inches (416 mm) of rain.  A weather station in Hongawa reported 13.05 inches (331.5 mm) of rain.  Heavy rainfall caused flash floods in some locations.

Tropical Storm Shanshan weakened on Thursday as the center moved over land.  Bands of showers and thunderstorms were revolving around the center of Shanshan’s circulation.  The heaviest rain was falling in bands in the eastern side of Tropical Storm Shanshan.  Winds to tropical storm force extended out 100 miles (160 km) from the center of Shanshan.

An upper level trough over northeastern Asia will steer Tropical Storm Shanshan toward the east-northeast during the next 24 hours.  On its anticipated track, the center Tropical Storm Shanshan will move across Shikoku during the next 24 hours.

Tropical Storm Shanshan will continue to drop heavy rain on parts of southwestern Japan on Friday.  Heavy rain will fall in parts of Shikoku and southwestern Honshu.  The heaviest rain will fall where southerly winds push air up the slopes of mountains.  Heavy rain is likely to cause additional flash floods.

Typhoon Shanshan Brings Wind and Rain to Kyushu

Typhoon Shanshan brought wind and rain to Kyushu on Wednesday.  At 5:00 p.m. EDT on Wednesday the center of Typhoon Shanshan was located at latitude 31.6°N and longitude 130.2°E which put the center about 35 miles (55 km) west of Kagoshima, Japan.  Shanshan was moving toward the north at 8 m.p.h. (13 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 Shanshan brought wind and rain to Kyushu on Wednesday.  The eastern side of the eyewall of Shanshan moved over Makurazaki, Japan.  A weather station in Makurazaki reported a sustained wind speed of 69 m.p.h. (111 km/h).  The weather station also reported 8.42 inches (214 mm) of rain.  A weather station in Kaseda reported 10.95 inches (278 mm) of rain.  A weather station in Ibusuki reported 9.33 inches (237 mm) of rain.

Typhoon Shanshan was weakening gradually when it reached the west coast of Kyushu.  An upper level trough over northeastern Asia was producing southwest winds that were blowing toward the top of Shanshan’s circulation.  Those winds caused more vertical wind shear.  The increase in wind shear caused Typhoon Shanshan to start to weaken.

An eye was no longer visible at the center of Typhoon Shanshan on conventional satellite images.  The former eye was still being detected by radars operated by the Japan Meteorological Agency.  There were breaks in the ring of thunderstorms that surrounded the former eye.  The strongest winds were still occurring in that broken ring of storms.  Bands of showers and thunderstorms were revolving around the core of Typhoon Shanshan.

The circulation around Typhoon Shanshan was still symmetrical.  Winds to typhoon force extended out 30 miles (50 km) from the center of Shanshan’s circulation.  Winds to tropical storm force extended out 125 miles (200 km) from the center of Typhoon Shanshan.

The Hurricane Intensity Index (HII) for Typhoon Shanshan was 16.5.  The Hurricane Size Index (HSI) was 11.8 and the Hurricane Wind Intensity Size Index (HWISI) was 28.3.  Typhoon Shanshan was similar in intensity to Hurricane Idalia when Idalia hit Florida in 2023.  Shanshan was bigger than Idalia was.

Typhoon Shanshan will move around the western end of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Shanshan toward the north during the next 12 hours.  The upper level trough over northeastern Asia will steer Shanshan toward the northeast on Thursday.  On its anticipated track, the center Typhoon Shanshan will move near the west coast of Kyushu during the next 12 hours.  Shanshan will move inland over Kyushu on Thursday.

Typhoon Shanshan will weaken gradually as it moves inland over Kyushu.  Even though Shanshan will weaken it will still produce strong winds and drop heavy rain over much of Kyushu.  Heavy rain is likely to cause flash floods in some locations,