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Tropical Storm Jangmi Brings Wind and Rain to Japan

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Tropical Storm Jangmi brought wind and rain to parts of Japan on Tuesday.  At 11:00 a.m. EDT on Tuesday the center of Tropical Storm Jangmi was located at latitude 32.8°N and longitude 134.3°E which put the center about 135 miles (215 km) southwest of Osaka, Japan.  Jangmi was moving toward the northeast at 29 m.p.h. (46 km/h).  The maximum sustained wind speed was 60 m.p.h. (95 km/h) and there were wind gusts to 80 m.p.h. (130 km/h).  The minimum surface pressure was 984 mb.

Tropical Storm Jangmi was bringing wind and rain to parts of Honshu on Tuesday.  A weather station at Kansai International Airport in Osaka (RJBB) reported a sustained wind speed of 43 m.p.h. (68 km/h) and a wind gust of 55 m.p.h. (89 km/h).

Tropical Storm Jangmi was making a transition to an extratropical cyclone on Tuesday.  The circulation around Jangmi was interacting with a stationary front that was just south of Japan.  The interaction with the front was causing the distribution of thunderstorms in Tropical Storm Jangmi to become more asymmetrical.  Thunderstorms were occurring in bands in the eastern and northern parts of Jangmi’s circulation.  Bands in the western and southern parts of Tropical Storm Jangmi consisted primarily of showers and lower clouds.

The circulation around Tropical Storm Jangmi was still large. Winds to tropical storm force extended out 240 miles (390 km) from the center of Jangmi’s circulation.

Tropical Storm Jangmi will move through an environment that will be unfavorable for intensification of a tropical cyclone during the next 24 hours.  Jangmi will move over water where the Sea Surface Temperatures are near 23°C.  It will move under the eastern part of an upper level trough that is over South Korea.  The upper level trough will produce strong southwesterly winds that will blow toward the top of Jangmi’s circulation.  Those winds will cause strong vertical wind shear.  The cool Sea Surface Temperature and the strong vertical wind shear will cause Tropical Storm Jangmi to continue to make a transition to an extratropical cyclone during the next 24 hours.

The upper level trough over South Korea will steer Tropical Storm Jangmi toward the east-northeast during the next 24 hours.  On its anticipated track, the center of Tropical Storm Jangmi will pass near Tokyo in 18 hours.

Tropical Storm Jangmi will continue to bring strong winds and locally heavy rain to parts of Honshu.  Heavy rain could cause flash floods in some locations.

Jangmi Brings Wind and Rain to Okinawa

Tropical Storm Jangmi brought wind and rain to Okinawa on Monday.  At 11:00 a.m. EDT on Monday the center of Tropical Storm Jangmi was located at latitude 27.3°N and longitude 128.0°E which put the center about 25 miles (40 km) northwest of Okinawa.  Jangmi was moving toward the north at 13 m.p.h. (21 km/h).  The maximum sustained wind speed was 65 m.p.h. (105 km/h) and there were wind gusts to 85 m.p.h. (130 km/h).  The minimum surface pressure was 982 mb.

Tropical Storm Jangmi brought wind and rain to Okinawa on Monday.  A weather station at Kadena Air Force Base in Okinawa (RODN) reported a sustained wind speed of 52 m.p.h. (84 km/h) and a wind gust of 71 m.p.h. (115 km/h).

Former Typhoon Jangmi weakened back to a tropical storm Monday.  A large eye with a diameter of 60 miles (95 km) was still present at the center of Tropical Storm Jangmi.  The eye was surrounded by a broken ring of thunderstorms and the strongest winds were occurring in that ring of storms.

The circulation around Tropical Storm Jangmi was pulling drier air around the western and southern parts of Jangmi’s circulation.  Thunderstorms were still occurring in bands in the eastern and northern parts of Tropical Storm Jangmi.  Bands in the western and southern sides of Jangmi’s circulation consisted primarily of showers and lower clouds.

Storms near the center of Jangmi generated upper level divergence that pumped mass away to the northeast of the tropical storm.  However, the removal of mass in the upper levels of the atmosphere was less than the convergence of mass in the lower levels.  So, the surface pressure increased gradually.

The circulation around Tropical Storm Jangmi was still large.  Winds to tropical storm force extended out 205 miles (330 km) from the center of Jangmi’s circulation.

Tropical Storm Jangmi will move through an environment that will be unfavorable for intensification during the next 24 hours.  Jangmi will move over water where the Sea Surface Temperatures are near 26°C. It will move under the eastern part of an upper level trough that is over the east coast of China.  The upper level trough will produce southwesterly winds that will blow toward the top of Jangmi’s circulation.  Those winds will cause the moderate vertical wind shear. Tropical Storm Jangmi will continue to weaken slowly during the next 24 hours.

The upper level trough over the east coast of China will steer Tropical Storm Jangmi toward the northeast during the next 24 hours.  On its anticipated track, the center of Jangmi will move over the northern Ryukyu Islands.  The center of Tropical Storm Jangmi will be southeast of Kyushu in 18 hours.

Tropical Storm Jangmi will bring strong winds and locally heavy rain to the northern Ryukyu Islands.  Heavy rain could cause flash floods in some locations. Jangmi will also bring strong winds and heavy rain to parts of Kyushu, Shikoku, and Honshu.

Typhoon Jangmi Approaches Okinawa

Typhoon Jangmi was approaching Okinawa on Sunday.  At 11:00 a.m. EDT on Sunday the center of Typhoon Jangmi was located at latitude 23.3°N and longitude 127.7°E which put the center about 255 miles (410 km) south of Okinawa.  Jangmi was moving toward the north at 12 m.p.h. (19 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 973 mb.

The northern part of Typhoon Jangmi was already affecting Okinawa on Sunday morning.  A weather station at Kadena Air Force Base (RODN) was reporting a sustained wind speed of 25 m.p.h. (40 km/h) and a wind gusts of 35 m.p.h. (55 km/h) even though the center of Jangmi was 255 miles (410 km) south of the station.

Typhoon Jangmi continued to intensify slowly during Saturday night.   A very large circular eye was at the center of Typhoon Jangmi.  The eye had a diameter of 80 miles (130 km).  The eye was surrounded by a broken ring of thunderstorms and the strongest winds were occurring in that ring of storms.  Bands of showers and thunderstorms were revolving around the center Jangmi’s circulation.  Storms near the center of Jangmi 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 Jangmi was large.  Winds to typhoon force extended out 90 miles (145 km) from the center of Jangmi’s circulation.  Winds to tropical storm force extended out 230 miles (370 km) from the center of Typhoon Jangmi.

The Hurricane Intensity Index (HII) for Typhoon Jangmi was 12.7.  The Hurricane Size Index (HSI) was 29.7 and the Hurricane Wind Intensity Size Index (HWISI) was 42.4.

Typhoon Jangmi will move into an environment that will become unfavorable for intensification during the next 24 hours.  Jangmi will move over water where the Sea Surface Temperatures are near 26°C.  It will move under the eastern part of an upper level trough that is over the east coast of China.  The upper level trough will produce southwesterly winds that will blow toward the top of Jangmi’s circulation.  Those winds will cause the vertical wind shear to increase.  Typhoon Jangmi will start to weaken slowly when the vertical wind shear increases.

Typhoon Jangmi will move around the western end of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Jangmi toward the north during the next 24 hours.  On its anticipated track, the center of Typhoon Jangmi will reach Okinawa in 18 hours.

Typhoon Jangmi will bring strong winds and locally heavy rain to the Ryukyu Islands including Okinawa.  Heavy rain is could cause flash floods in some locations.  Typhoon Jangmi could also cause a storm surge of up to 10 feet (3 meters) along portions of the coasts of the Ryukyu Islands.

 

Jangmi Strengthens to a Typhoon

Former Tropical Storm Jangmi strengthened to a typhoon on Saturday.  At 11:00 a.m. EDT on Saturday the center of Typhoon Jangmi was located at latitude 19.7°N and longitude 128.8°E which put the center about 500 miles (805 km) south of Okinawa.  Jangmi was moving toward the north-northwest at 14 m.p.h. (22 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 979 mb.

Former Tropical Storm Jangmi strengthened to a typhoon south of Okinawa on Saturday.  A very large circular eye formed at the center of Typhoon Jangmi.  The eye had a diameter of 70 miles (110 km).  The eye was surrounded by a broken ring of thunderstorms and the strongest winds were occurring in that ring of storms.  Bands of showers and thunderstorms were revolving around the center Jangmi’s circulation.  Storms near the center of Jangmi 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 Jangmi was large.  Winds to typhoon force extended out 90 miles (145 km) from the center of Jangmi’s circulation.  Winds to tropical storm force extended out 205 miles (335 km) from the center of Typhoon Jangmi.

Typhoon Jangmi will move through an environment favorable for intensification during the next 24 hours.  Jangmi will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge that is southwest of Japan.  The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear. Typhoon Jangmi will intensify during the next 24 hours.

Typhoon Jangmi will move around the western end of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Jangmi toward the north-northwest during the next 24 hours.  On its anticipated track, Typhoon Jangmi will approach Okinawa in 36 hours.

Typhoon Jangmi will bring strong winds and locally heavy rain to the Ryukyu Islands including Okinawa.  Heavy rain is could cause flash floods in some locations.  Typhoon Jangmi could also cause a storm surge of up to 10 feet (3 meters) along portions of the coasts of the Ryukyu Islands.

Tropical Storm Jangmi Continues to Intensify

Tropical Storm Jangmi continued to intensify over the Western North Pacific Ocean on Friday.  At 5:00 p.m. EDT on Friday the center of Tropical Storm Jangmi was located at latitude 17.0°N and longitude 130.4°E which put the center about 705 miles (1135 km) south-southeast of Okinawa.  Jangmi was moving toward the west-northwest at 12 m.p.h. (19 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 989 mb.

Tropical Storm Jangmi continued to intensify as it moved over the Western North Pacific Ocean south-southeast of the Ryukyu Islands on Friday.  The inner end of a rainband wrapped around the center of Jangmi’s circulation.  Other bands of showers and thunderstorms were revolving around the center of Tropical Storm Jangmi.  Storms near the center of Jangmi generated upper level divergence that pumped mass away from the tropical storm.  The removal of mass caused the surface pressure to decrease.

The circulation around Tropical Storm Jangmi was large.  Winds to tropical storm force extended out 185 miles (295 km) from the center of Jangmi’s circulation.

Tropical Storm Jangmi will move through an environment favorable for intensification during the next 24 hours.  Jangmi will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge that is south of Japan. The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear.  Tropical Storm Jangmi will intensify during the next 24 hours.  Jangmi is likely strengthen to a typhoon.

Tropical Storm Jangmi will move around the western end of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Jangmi toward the northwest during the next 24 hours.  On its anticipated track, Tropical Storm Jangmi will approach the southern Ryukyu Islands in 48 hours.

Tropical Storm Jangmi is likely to be a typhoon when it approaches the southern Ryukyu Islands.  Jangmi will bring strong winds and locally heavy rain to the Ryukyu Islands.  Heavy rain is could cause flash floods in some locations.

Tropical Storm Jangmi Gradually Strengthening

Tropical Storm Jangmi gradually strengthened on Thursday as it moved over the Western North Pacific Ocean southeast of the Ryukyu Islands.  At 11:00 p.m. EDT on Thursday the center of Tropical Storm Jangmi was located at latitude 15.7°N and longitude 133.3°E which put the center about 855 miles (1380 km) south-southeast of Okinawa.  Jangmi was moving toward the northwest at 13 m.p.h. (21 km/h).  The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (95 km/h).  The minimum surface pressure was 997 mb.

Tropical Storm Jangmi strengthened gradually on Thursday.  More thunderstorms formed near the center of Jangmi’s circulation.  More thunderstorms also developed in bands in the western and southern parts of Tropical Storm Jangmi.  Bands in the eastern and northern parts of Jangmi’s circulation still consisted primarily of showers and lower clouds.  Storms near the center of Jangmi generated a little more upper level divergence that pumped mass away from the tropical storm.  The removal of a little more mass caused the surface pressure to decrease slowly.

The circulation around Tropical Storm Jangmi was still large.  Winds to tropical storm force extended out 175 miles (280 km) from the center of Jangmi’s circulation.

Tropical Storm Jangmi will move through an environment favorable for intensification during the next 24 hours.  Jangmi will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge that is south of Japan.  The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear.  Tropical Storm Jangmi will intensify during the next 24 hours.  The large circulation around Jangmi could cause it to intensify slowly at times.  Jangmi could strengthen to a typhoon within 36 hours.

Tropical Storm Jangmi will move around the western end of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Jangmi toward the northwest during the next 24 hours.  On its anticipated track, Tropical Storm Jangmi will approach the southern Ryukyu Islands in three days.

Tropical Storm Jangmi Forms West of Yap

Tropical Storm Jangmi formed over the Western North Pacific Ocean west of Yap on Tuesday night.  At 5:00 a.m. EDT on Wednesday the center of Tropical Storm Jangmi was located at latitude 9.9°N and longitude 137.3°E which put the center about 40 miles (65 km) west of Yap.  Jangmi was moving toward the north-northwest at 5 m.p.h. (8 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.

A low pressure system over the Western North Pacific Ocean west of Yap strengthened on Tuesday night and the Japan Meteorological Agency designated the system as Tropical Storm Jangmi.

The circulation around Tropical Storm Jangmi was large.  Thunderstorms were occurring in bands in the western side of Jangmi’s circulation.  Thunderstorms were also occurring in a band in the eastern periphery of Tropical Storm Jangmi.  Other bands in the eastern side of Jangmi’s circulation consisted primarily of showers and lower clouds.  Storms near the center of Jangmi generated upper level divergence that pumped mass away from the tropical storm.  The removal of mass caused the surface pressure to decrease.

The circulation around Tropical Storm Jangmi was large.  Winds to tropical storm force extended out 150 miles (240 km) from the center of Jangmi’s circulation.

Tropical Storm Jangmi will move through an environment favorable for intensification during the next 24 hours.  Jangmi will move over water where the Sea Surface Temperatures are near 29°C.   It will move under the middle of an upper level ridge that is east of the Philippines.  The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear.  Tropical Storm Jangmi will intensify during the next 24 hours.  The large circulation around Jangmi could cause it to intensify slowly at first.  Jangmi could strengthen to a typhoon by the weekend.

Tropical Storm Jangmi will move around the western end of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Jangmi toward the north-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Jangmi will move slowly away from Yap.  Jangmi could approach the Ryukyu Islands in a few days.

Tropical Storm Jangmi will continue to bring gusty winds and heavy rain to Yap until it moves farther away later this week.  Heavy rain could cause flash floods in some locations.

Tropical Storm Nakri Moves Away from Japan

Tropical Storm Nakri moved away from Japan on Monday.  At 5:00 p.m. EDT on Monday the center of Tropical Storm Nakri was located at latitude 34.3°N and longitude 149.1°E which put the center about 460 miles (740 km) east of Tokyo, Japan.  Nakri was moving toward the east at 23 m.p.h. (37 km/h).  The maximum sustained wind speed was 70 m.p.h. (110 km/h) and there were wind gusts to 85 m.p.h. (135 km/h).  The minimum surface pressure was 985 mb.

Former Typhoon Nakri weakened back to a tropical storm on Monday as it quickly moved farther away from Japan.  Nakri was still a very well organized tropical storm.  The inner end of a rainband wrapped most of the way around the center of Nakri’s circulation.  Bands of showers and thunderstorms revolved around the center of Tropical Storm Nakri.  Storms near the center of Nakri generated upper level divergence that pumped mass away to the east of the tropical storm.

The distribution of winds speeds around Tropical Storm Nakri was fairly symmetrical.  Winds to tropical storm force extended out 155 miles (250 km) from the center of Nakri’s circulation.

Tropical Storm Nakri will move through an environment that will be unfavorable for intensification of a tropical cyclone during the next 24 hours.  Nakri will move over water where the Sea Surface Temperatures are near 25°C.  It will move under the southeastern part of an upper level trough that is over northern Japan.  The upper level trough will produce westerly winds that will blow toward the top of Nakri’s circulation.  Those winds will cause strong vertical wind shear.  Cooler Sea Surface Temperatures and strong vertical wind shear will cause Tropical Storm Nakri to weaken during the next 24 hours.  The cooler Sea Surface Temperatures and strong vertical wind shear will also cause Nakri to make a transition to an extratropical cyclone.

The upper level trough over northern Japan will steer Tropical Storm Nakri quickly toward the east during the next 24 hours.  On its anticipated track, Tropical Storm Nakri will continue to move quickly away from Japan.

Nakri Strengthens to a Typhoon

Former Tropical Storm Nakri strengthened to a typhoon south of Japan on Sunday.  At 11:00 a.m. EDT on Sunday the center of Tropical Storm Nakri was located at latitude 32.0°N and longitude 137.4°E which put the center about 285 miles (460 km) southwest of Tokyo, Japan.  Nakri was moving toward the east-northeast at 16 m.p.h. (26 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.

Former Tropical Storm Nakri strengthened to a typhoon south of Japan on Sunday.  A small circular eye was present at the center of Typhoon Nakri.  The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that ring of storms.  Thunderstorms were also occurring in bands in the northern and eastern parts of Nakri’s circulation.  Bands in the southern and western sides of Typhoon Nakri consisted primarily of showers and lower clouds.  Storms near the center of Nakri generated upper level divergence that pumped mass away to the east of the typhoon.

Winds to typhoon force extended out 15 miles (25 km) from the center of Typhoon Nakri.  Winds to tropical storm force extended out 110 miles (175 km) in the eastern half of Nakri’s circulation.  Winds to tropical storm force only extended out 45 miles (75 km) in the western side of Typhoon Nakri.

Typhoon Nakri will move through an environment favorable for intensification during the next 24 hours.  Nakri will move over water where the Sea Surface Temperatures are near 28°C.  It will move under the eastern side of an upper level trough that is west of Japan.  The upper level trough will produce westerly winds that will blow toward the top of Nakri’s circulation.  However, the winds in the lower atmosphere will also blow from the west.  So, there will not be a lot of vertical wind shear. Typhoon Nakri is likely to intensify during the next 24 hours.

The upper level trough that is west of Japan will steer Typhoon Nakri toward the east-northeast during the next 24 hours.  On its anticipated track, Typhoon Nakri will pass south of Tokyo in 12 hours.

Tropical Storm Nakri Moves South of Japan

Tropical Storm Nakri moved south of Japan on Saturday.  At 11:00 a.m. EDT on Saturday the center of Tropical Storm Nakri was located at latitude 29.1°N and longitude 132.0°E which put the center about 320 miles (515 km) south-southwest of Kochi, Japan.  Nakri was moving toward the north-northeast at 13 m.p.h. (21 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 997 mb.

Tropical Storm Nakri started to strengthen on Saturday as it moved south of Japan.  The inner end of a rainband wrapped around the center of Nakri’s circulation.  An eye appeared to be forming at the center of Tropical Storm Nakri.  Bands of showers and thunderstorms were revolving around the center of Nakri’s circulation.  Storms near the center of Nakri generated upper level divergence that pumped mass away to the east of the tropical storm.  The removal of mass caused the surface pressure to decrease.

The size of the circulation around Tropical Storm Nakri was relatively small.  Winds to tropical storm force extended out 105 miles (165 km) from the center of Nakri’s circulation.

Tropical Storm Nakri will move through an environment favorable for intensification during the next 24 hours.  Nakri will move over water where the Sea Surface Temperatures are near 28°C.  It will move under the eastern side of an upper level trough that is west of Japan.  The upper level trough will produce southwesterly winds that will blow toward the top of Nakri’s circulation.  However, the winds in the lower atmosphere will also blow from the west.  So, there will not be a lot of vertical wind shear.  Tropical Storm Nakri will intensify during the next 24 hours.  Nakri could strengthen to a typhoon on Sunday.

The upper level trough that is west of Japan will steer Tropical Storm Nakri toward the northeast during the next 24 hours.  On its anticipated track, Tropical Storm Nakri will move south of Honshu on Sunday.