Tag Archives: Shikoku

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 Continues to Strengthen

Typhoon Shanshan continues to strengthen over the Western North Pacific Ocean south of Japan on Sunday.  At 11:00 p.m. EDT on Sunday the center of Typhoon Shanshan was located at latitude 27.3°N and longitude 133.5°E which put the center about 350 miles (565 km) south-southeast of Kagoshima, Japan.  Shanshan was moving toward the west-northwest at 12 m.p.h. (19 km/h).  The maximum sustained wind speed was 90 m.p.h. (145 km/h) and there were wind gusts to 115 m.p.h. (185 km/h).  The minimum surface pressure was 968 mb.

Typhoon Shanshan strengthened gradually on Sunday as it moved over the Western North Pacific Ocean south of Japan.  A large circular eye was present at the center of Shanshan’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 Shanshan.  Storms near the core of Shanshan’s circulation generated more upper level divergence that pumped mass away from the typhoon.  The removal of more mass caused the surface pressure to decrease.

The size of the circulation around typhoon Shanshan increased slightly on Sunday.  Winds to typhoon force extended out 35 miles (55 km) from the center of Shanshan’s circulation.  Winds to tropical storm force extended out 145 miles (230 km) from the center of Typhoon Shanshan.

The Hurricane Intensity Index (HII) for Typhoon Shanshan was 13.9.  The Hurricane Size Index (HSI) was 11.7 and the Hurricane Wind Intensity Size Index (HWISI) was 25.6.

Typhoon Shanshan will move through an environment that will be favorable for intensification during the next 24 hours.  Shanshan will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the northern periphery of an upper level low south of Japan.  The upper level low will produce easterly winds that will blow toward the top of Shanshan’s circulation.  Those winds will cause some vertical wind shear, but the wind shear will not be enough to prevent intensification.  Typhoon Shanshan will intensify during the next 24 hours.

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 northwest during the next 24 hours.  On its anticipated track, Typhoon Shanshan will move closer to Kyushu and Shikoku.  Shanshan could approach southwestern Japan in 48 hours.  Shanshan could be a strong typhoon when it approaches Japan.

 

Typhoon Shanshan Passes West of Iwo To

The center of Typhoon Shanshan passed west of Iwo To on Saturday night.  At 11:00 p.m. EDT on Saturday the center of Typhoon Shanshan was located at latitude 25.4°N and longitude 138.4°E which put the center about 150 miles (240 km) west of Iwo To.  Shanshan 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 974 mb.

Typhoon Shanshan maintained its intensity on Saturday as it moved over the Western North Pacific Ocean west of Iwo To.  Shanshan moved under the eastern side of an upper level low south of Japan.  The upper level low produced southerly winds that blew toward the top of Shanshan’s circulation.  Those winds caused moderate vertical wind shear, and the wind shear prevented intensification of Typhoon Shanshan.

The vertical wind shear also affected the structure of Typhoon Shanshan.  A small circular eye was present at the center of Shanshan’s circulation.  The eye was surrounded by a broken ring of thunderstorms and the strongest winds were occurring in that ring of storms.  Thunderstorms were occurring in bands in the northern side of Typhoon Shanshan.  Bands in the southern part of Shanshan’s circulation consisted primarily of showers and lower clouds.  Storms near the center of Shanshan generated upper level divergence that pumped mass away to the north of the typhoon.  The removal of mass in the upper levels was balanced by the inflow of mass in the lower levels of the atmosphere.  The balance of the outflow and inflow of mass caused the surface pressure to remain steady on Saturday.

Winds to typhoon force extended out 35 miles (55 km) from the center of Typhoon Shanshan.  Winds to tropical storm force extended out 125 miles (200 km) from the center of Shanshan’s circulation.

Typhoon Shanshan will move through an environment that will become more favorable for intensification during the next 24 hours.  Shanshan will move over water where the Sea Surface Temperatures are near 29°C.  It will move farther away from the upper level low south of Japan.  The upper level low will still produce southerly winds that will blow toward the top of Shanshan’s circulation.  However, there will be less vertical wind shear on Sunday.  Typhoon Shanshan is likely to intensify during the next 24 hours.

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 northwest during the next 24 hours.  On its anticipated track, Typhoon Shanshan will move closer to Kyushu and Shikoku.  Shanshan could approach southwestern Japan in 48 hours.  Shanshan could be a strong typhoon when it approaches Japan.

 

Tropical Storm Nanmadol Brings Wind and Rain to Japan

Tropical Storm Nanmadol brought wind and rain to Japan on Sunday. At 11:00 p.m. EDT on Sunday the center of Tropical Storm Nanmadol was located at latitude 34.5°N and longitude 131.9°E which put it about 30 miles (50 km) west of Hiroshima, Japan. Nanmadol was moving toward the north-northeast at 13 m.p.h. (20 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 976 mb.

Former Typhoon Nanmadol weakened to a strong tropical storm as it moved inland over Kyushu on Sunday. The circulation around Tropical Storm Nanmadol was still large. Winds to tropical storm force extended out 275 miles (445 km) from the center of Nanmadol. The strongest winds and heaviest rain were occurring in band in the eastern and northern parts of Nanmadol. Bands in the southern and western parts of Tropical Storm Nanmadol consisted primarily of showers and lower clouds.

The eye of then Typhoon Nanmadol moved over Kagoshima earlier on Sunday. A weather station in Kagoshima measured a surface pressure of 940.8 mb. The same weather station also measured 7.10 inches (180 mm) of rain. Heavy rain fell over many other locations in Kyushu and there were reports of flash floods in some locations.

An upper level trough northwest of Japan will steer Tropical Storm Nanmadol quickly toward the northeast during the next 36 hours. On its anticipated track Tropical Storm Nanmadol will move over much of Honshu. Nanmadol will bring gusty winds and locally heavy rain to Shikoku and Honshu. Heavy rain could cause flash floods in some locations.

Typhoon Nanmadol Brings Strong Wind and Heavy Rain to Kyushu

Typhoon Nanmadol brought strong winds and heavy rain to Kyushu on Sunday morning. At 5:00 a.m. EDT on Sunday the center of Typhoon Nanmadol was located at latitude 31.1°N and longitude 130.6°E which put it about 40 miles (65 km) south of Kagoshima, Japan. Nanmadol 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 969 mb.

The center of Typhoon Nanmadol was moving inland over Kyushu on Sunday morning. Nanmadol was a large an powerful typhoon. Winds to typhoon force extended out 75 miles (120 km) from the center of Nanmadol. Winds to tropical storm force extended out 250 miles (400 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Nanmadol was 19.2. The Hurricane Size Index (HSI) was 30.2 and the Hurricane Wind Intensity Size Index (HWISI) was 51.1. Typhoon Nanmadol was capable of causing extensive serious damage.

Typhoon Nanmadol will move around the western end of a high pressure system over the Western North Pacific Ocean during the next 12 hours. The high pressure system will steer Nanmadol toward the north during that time. On its anticipated track the center of Typhoon Nanmadol will continue to move farther inland over Kyushu. Nanmadol will continue to produce strong gusty winds and locally heavy rain to Kyushu. Heavy rain is likely to cause flash floods in some locations. The westerly winds in the middle latitudes will Nanmadol toward the northeast later today. Typhoon Nanmadol will move over Honshu tomorrow. Nanmadol will bring strong winds and heavy rain to much of Honshu and Shikoku, when it moves northeastward.

Typhoon Nanmadol Near Yakushima

The center of Typhoon Nanmadol was near Yakushima on Saturday night. At 11:00 p.m. EDT on Saturday the center of Typhoon Nanmadol was located at latitude 30.2°N and longitude 130.8°E which put it about 90 miles (145 km) south of Kagoshima, Japan. Nanmadol was moving toward the north-northwest at 14 m.p.h. (22 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 951 mb.

The eye of Typhoon Nanmadol was just southeast of Yakushima on Saturday night. The northwestern part of the eyewall was over Yakushima. Bands on the northern side of Typhoon Nanmadol were producing gusty winds and locally heavy rain over Kyushu.

Nanmadol was a large typhoon. Winds to typhoon force extended out 70 miles (110 km) from the center of Typhoon Nanmadol. Winds to tropical storm force extended out 275 miles (445 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Nanmadol was 22.1. The Hurricane Size Index (HSI) was 29.0 and the Hurricane Wind Intensity Size Index (HWISI) was 51.1. Typhoon Nanmadol was capable of causing widespread serious damage.

Typhoon Nanmadol will move around the western end of a high pressure system over the Western North Pacific Ocean during the next 24 hours. The high pressure system will steer Nanmadol toward the north during the next 24 hours. On its anticipated track the center of Typhoon Nanmadol will reach southwestern Kyushu in a few hours. Nanmadol will bring strong gusty winds and locally heavy rain to Kyushu. Heavy rain is likely to cause flash floods in some locations. The westerly winds in the middle latitudes will Nanmadol toward the northeast in a day or so. Typhoon Nanmadol will move over Honshu early next week. Nanmadol will bring strong winds and heavy rain to Honshu and Shikoku.

Typhoon Chan-hom Turns Toward Japan

Typhoon Chan-hom turned toward Japan on Wednesday.  At 5:00 p.m. EDT on Wednesday the center of Typhoon Chan-hom was located at latitude 27.5°N and longitude 132.9°W which put it about 515 miles (825 km) south-southwest of Osaka, Japan.  Chan-hom was moving toward the northwest at 9 m.p.h. (15 km/h).  The maximum sustained wind speed was 80 m.p.h. (130 km/h) and there were wind gusts to 100 m.p.h. (160 km/h).  The minimum surface pressure was 973 mb.

Typhoon Chan-hom strengthened slowly on Wednesday.  An eye with a diameter of 35 miles (55 km) formed at the center of Chan-hom.  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 core of Typhoon Chan-hom.  Storms near the core generated upper level divergence which pumped mass away to the northeast of the typhoon.

The circulation around Typhoon Chan-hom was large.  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 of Chan-hom.

Typhoon Chan-hom will move through an environment somewhat favorable for intensification during the next 24 hours.  Chan-hom will move over water where the Sea Surface Temperature is near 28°C.  It will move under the western end of an upper level ridge.  The ridge will produce southerly winds which will blow toward the top of Typhoon Chan-hom.  Those winds will cause moderate vertical wind shear, which will inhibit intensification.  The wind shear will limit intensification, but Chan-hom could get stronger during the next 24 hours.  An upper level trough over eastern Asia will cause stronger southwesterly winds to blow toward Typhoon Chan-hom in a day or so.  Those winds will cause stronger vertical wind shear and they will cause Chan-hom to start to weaken.

Typhoon Chan-hom 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 Chan-hom toward the north during that time period.  The upper trough over eastern Asia will turn Typhoon Chan-hom toward the northeast during the weekend.  On its anticipated track Typhoon Chan-hom will be southeast of Kyushu and south of Shikoku in about 48 hours.

Powerful Typhoon Hagibis Continues Toward Honshu

Powerful Typhoon Hagibis continue to move toward Honshu on Wednesday.  At 11:00 p.m. EDT on Wednesday the center of Typhoon Hagibis was located at latitude 23.7°N and longitude 139.5°E which put it about 140 miles (225 km) west-southwest of Iwo To.  Hagibis was moving toward the north at 14 m.p.h. (22 km/h).  The maximum sustained wind speed was 160 m.p.h. (260 km/h) and there were wind gusts to 195 m.p.h. (315 km/h).  The minimum surface pressure was 918 mb.

Typhoon Hagibis continued to have a powerful, large circulation on Wednesday.  A circular eye with a diameter of 25 miles (40 km) was at the center of circulation.  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 Hagibis.  The rainbands in the northwestern quadrant of Hagibis were a little weaker than the bands in other parts of the typhoon.  Some drier air may have been being pulled into the the northwestern quadrant of the circulation.  Storms around the core of the typhoon continue to generate strong upper level divergence.

The strength of the winds around Typhoon Hagibis exhibited more asymmetry on Wednesday.  Winds to typhoon force extended out 150 miles (240 km) from the center of circulation in the northeastern part of Hagibis.  Winds to typhoon force were occurring within 100 miles (160 km) of the center in the other parts of Typhoon Hagibis.  Winds to tropical storm force extended out 370 miles (565 km) from the center.  The Hurricane Intensity Index (HII) for Typhoon Hagibis was 35.0.  The Hurricane Size Index (HSI) was 39.9 and he Hurricane Wind Intensity Size Index (HWISI) was 74.9.  Typhoon Hagibis was capable of causing extensive catastrophic damage.

Typhoon Habigis will continue to move through an environment capable of supporting strong  typhoons, but Hagibis is likely to start to weaken on Thursday.  Typhoon Hagibis will move over water where the Sea Surface Temperature is near 29°C, but that is slightly cooler than the water Hagibis has been over.  Typhoon Hagibis will move through a region where the upper level winds are weak during the next 24 hours.  There will be little vertical wind shear on Thursday, and so Hagibis will likely weaken slowly.  Typhoon Hagibis will move closer to upper level westerly winds in the middle latitudes on Friday.  When Hagibis gets closer to the stronger upper level winds, vertical wind shear will increase and the typhoon will weaken more quickly.  The large circulation around Typhoon Hagibis will slow the rate of weakening even when the wind shear increases.

Typhoon Hagibis will move around the western end of a subtropical high pressure system over the Western North Pacific Ocean during the next 24 hours.  The high will steer Hagibis toward the north on Thursday.  Typhoon Hagibis will move toward the northeast on Friday when it reaches the upper level westerly winds.  On its anticipated track the center of Typhoon Hagibis will move west of Iwo To during the next 24 hours.  Hagibis will bring winds to tropical storm force to Iwo To and there is a chance that the winds could reach typhoon force at times.  Rainbands on the eastern side of the typhoon will drop heavy rain on Iwo To.  Typhoon Hagibis could approach the coast of Honshu near Tokyo in a little over 48 hours.  Hagibis will still be a typhoon when it approaches Tokyo.  It will bring strong winds and heavy rain to parts of Honshu.  Typhoon Hagibis could also produce winds to tropical storm force on Shikoku.

Large Powerful Typhoon Hagibis Turns Toward Japan

Large powerful Typhoon Hagibis turned toward Japan on Tuesday.  At 11:00 p.m. EDT on Tuesday the center of Typhoon Hagibis was located at latitude 20.2°N and longitude 140.1°E which put it about 350 miles (565 km) south of Iwo To.  Hagibis was moving toward the northwest at 10 m.p.h. (16 km/h).  The maximum sustained wind speed was 160 m.p.h. (260 km/h) and there were wind gusts to 195 m.p.h. (315 km/h).  The minimum surface pressure was 915 mb.

Typhoon Hagibis appeared to complete an eyewall replacement cycle on Tuesday.  The original tiny pinhole eye was no longer visible on satellite imagery.  A larger circular eye with a diameter of 24 miles (39 km) was at the center of Hagibis.  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 Hagibis.  Storms around the core were generating strong upper level divergence which was pumping mass away from the typhoon in all directions.

Completion of the eyewall replacement cycle increased the size of the circulation around Typhoon Hagibis.  Winds to typhoon force extended out 115 miles (185 km) from the center of circulation.  Winds to tropical storm force extended out 350 miles (565 km) from the center.  The Hurricane Intensity Index (HII) for Typhoon Hagibis was 35.0.  The Hurricane Size Index (HSI) was 38.1 and the Hurricane Wind Intensity Size Index (HWISI) was 73.1.  Hagibis was capable of causing extensive catastrophic damage.

Typhoon Hagibis will move through an environment capable of supporting intense typhoons during the next 24 to 36 hours.  Hagibis 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 Hagibis will move closer to the upper level westerly winds in the middle latitudes in two or three days.  Those winds will cause more vertical wind shear and Hagibis will weaken when the shear increases.

Typhoon Hagibis will move around the western end of a subtropical high pressure system over the Western North Pacific Ocean.  The high will steer Hagibis toward the north-northwest during the next 48 hours.  The upper level westerly winds will steer Typhoon Hagibis quickly toward the northeast later this week.  On its anticipated track the center of Typhoon Hagibis could approach the coast of Honshu near Tokyo in 72 to 84 hours.  Hagibis could bring strong winds and heavy rain to Tokyo.  The large circulation around Typhoon Hagibis will mean that much of central Honshu could experience gusty winds and winds to tropical storm force could affect parts of Kyushu and Shikoku.

Tropical Storm Krosa Brings Wind and Rain to Southwest Japan

Large Tropical Storm Krosa brought wind and rain to parts of southwestern Japan on Wednesday night.  At 11:00 p.m. EDT on Wednesday the center of Tropical Storm Krosa was located at latitude 33.2°N and longitude 132.9°E which put it about 20 miles (30 km) south-southwest of Uwajima, Japan.  Krosa was moving toward the north at 13 m.p.h. (20 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 975 mb.

The center of large Tropical Storm Krosa was near the southwestern coast of Shikoku on Wednesday night.  The strongest winds were blowing in rainbands that were east of the center of circulation.  Winds to tropical storm force extended out about 260 miles (420 km) from the center of circulation.  The wind was weaker in the western half of Krosa.

Heavy rain was falling on the south facing slopes of Shikoku where the wind was blowing up the slopes.  Heavy rain was also falling on south facing slopes in Wakayama, Mie, Nara and Shiga prefectures in Honshu.  Prolonged heavy rainfall could cause flash floods in some locations.

Tropical Storm Krosa is forecast to move north-northeast across Shikoku and southwestern Honshu.  Krosa will weaken when it moves over land, but it will continue to drop heavy rain over parts of southwestern Japan on Thursday.  A weaker Tropical Storm Krosa is forecast to move over the Sea of Japan later on Thursday.