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Tropical Storm Yagi Drops Heavy Rain on Northern Luzon

Tropical Storm Yagi dropped heavy rain on parts of northern Luzon on Monday.  At 11:00 a.m. EDT on Monday the center of Tropical Storm Yagi was located at latitude 17.5°N and longitude 121.7°E which put the center about 25 miles (40 km) south of Tuguegarao, Philippines.  Yagi was moving toward the north-northwest at 9 m.p.h. (15 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 996 mb.

The center of Tropical Storm Yagi moved across northern Luzon on Monday.  Storms near the center of Yagi’s circulation dropped heavy rain on parts of northern Luzon.  There were reports that heavy rain caused floods and landslides in some locations.  There were also reports that the floods and landslides caused an unknown number of deaths.

The circulation around Tropical Storm Yagi weakened gradually as Yagi move across northern Luzon.  Thunderstorms were still occurring near the center of Yagi’s circulation.  Thunderstorms were also occurring in bands revolving around the center of circulation.  Storms near the center of Yagi 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 Tropical Storm Yagi.

Tropical Storm Yagi will move around the western part of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Yagi toward the northwest during the next 24 hours.  On its anticipated track, the center of Tropical Storm Yagi will move over the South China Sea in 12 hours.  A second high pressure system that is over China will steer Yagi toward the west on Tuesday.

Tropical Storm Yagi will continue to weaken gradually during the next few hours while it moves across northern Luzon.  Yagi will move into an environment that will be favorable for intensification when it moves over the South China Sea.  Yagi will move over water where the Sea Surface Temperatures are near 30°C.  It will move under the middle of an upper level ridge over the South China Sea.  The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear.  Tropical Storm Yagi is likely to intensify after it moves over the South China Sea.  Yagi is likely to strengthen to a typhoon by the middle of the week.

Tropical Storm Yagi will continue to drop heavy rain over northern Luzon during the next few hours.  Heavy rain is likely to cause additional floods and landslides.

Tropical Storm Yagi Forms Near the Northern Philippines

Tropical Storm Yagi formed near the northern Philippines on Sunday.  At 11:00 a.m. EDT on Sunday the center of Tropical Storm Yagi was located at latitude 13.9°N and longitude 124.4°E which put the center about 40 miles (65 km) northeast of Virac, Philippines.  Yagi 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 998 mb.

A low pressure system near the northern Philippines strengthened on Sunday morning and the Japan Meteorological Agency designated the system as Tropical Storm Yagi.  The center of Yagi’s circulation was near Catanduanes Island.  Thunderstorms were forming near the center of Tropical Storm Yagi.  However, the distribution of thunderstorms in Yagi was asymmetrical.  Thunderstorms were forming in bands in the western half of Yagi’s circulation.  Bands in the eastern half of Tropical Storm Yagi consisted primarily of showers and lower clouds.  Storms near the center of Yagi began to generate upper level divergence that pumped mass away from the tropical storm.

Tropical Storm Yagi will move through an environment that will be mostly favorable for intensification during the next 24 hours.  Yagi will move over water where the Sea Surface Temperatures are near 30°C.  It will move under the southern part of an upper level ridge over the Western North Pacific Ocean.  The upper level ridge will produce easterly winds that will blow toward the top of Yagi’s circulation.  Those winds will cause moderate vertical wind shear.  The wind shear will inhibit intensification, but the shear will not be enough to prevent Yagi from strengthening.  Tropical Storm Yagi is likely to intensify during the next 24 hours.

Tropical Storm Yagi will move around the western part of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Yagi toward the north-northwest during the next 24 hours.  On its anticipated track, the center of Tropical Storm Yagi will move near the east coast of Luzon.  A second high pressure system that is over China will steer Yagi toward the west early next week.

Bands in the western side of Tropical Storm Yagi will drop heavy rain over parts of Luzon.  Heavy rain is likely to cause widespread flooding.

Tropical Storm Yun-yeung Moves Toward Honshu

Tropical Storm Yun-Yeung moved toward Honshu on Wednesday. At 11:00 p.m. EDT on Wednesday the center of Tropical Storm Yun-yeung was located at latitude 30.2°N and longitude 136.7°E which put it about 430 miles (695 km) south-southwest of Tokyo, Japan. Yun-yeung was moving toward the north-northeast at 15 m.p.h. (24 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 994 mb.

Tropical Storm Yun-yeung consisted primarily of a low level circulation on Wednesday night. The bands revolving around the center of Yun-yeung’s circulation contained primarily showers and lower clouds. A strong upper level trough northwest of Japan produced strong southwesterly winds that blew across the top of Tropical Storm Yun-Yeung. Those winds caused strong vertical wind shear and the winds blew the upper part of Yun-Yeung’s circulation to the northeast of the circulation near the surface . There was a band of thunderstorms near the northern periphery of Tropical Storm Yun-yeung. Winds to tropical storm force extended out 100 miles (160 km) in the eastern side of Yun-Yeung’s circulation. The winds in the western side of Yun-yeung were blowing at less than tropical storm force.

Tropical Storm Yun-yeung will move through an environment unfavorable for intensification of a tropical storm during the next 36 hours. Yun-yeung will move over water where the Sea Surface Temperatures are near 28°C. However, the upper level trough northwest of Japan will continue to cause strong vertical wind shear. The strong vertical wind shear will prevent intensification of Tropical Storm Yun-yeung. Yun-yeung could get a little stronger, if it makes a transition to an extratropical cyclone.

Tropical Storm Yun-yeung will move around the northwestern part of high pressure system over the Western North Pacific. The high pressure system and the upper level trough northwest of Japan will steer Yun-yeung toward the northeast during the next 36 hours. On its anticipated track, Tropical Storm Yun-yeung will approach Tokyo in 36 hours.

Tropical Storm Yun-yeung Forms South of Japan

Tropical Storm Yun-yeung formed over the Western North Pacific Ocean south of Japan on Tuesday night. At 11:00 p.m. EDT on Tuesday the center of Tropical Storm Yun-yeung was located at latitude 26.2°N and longitude 133.6°E which put it about 810 miles (1305 km) south-southwest of Tokyo, Japan. Yun-yeung was moving toward the north 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 998 mb.

A low pressure system over the Western North Pacific Ocean strengthened on Tuesday and the Japan Meteorological Agency designated the system as Tropical Storm Yun-yeung. More thunderstorms developed near the center of Yun-yeung’s circulation on Tuesday evening, but the distribution of thunderstorms was asymmetrical. Most of the thunderstorms were occurring in bands in the southern half of Tropical Storm Yun-yeung. Bands in the northern half of the circulation consisted primarily of showers and lower clouds. The distribution of wind speeds was also asymmetrical. Winds to tropical storm force extended out 40 miles (65 km) in the eastern side of Yun-yeung’s circulation. The winds in the eastern side of Yun-yeung were blowing at less than tropical storm force.

Tropical Storm Yun-yeung will move through an environment somewhat favorable for intensification during the next 24 hours. Yun-yeung will move over water where the Sea Surface Temperatures are near 28°C. It will move under the eastern side on an upper level ridge south of Japan. The upper level ridge will produce northeasterly winds that will blow toward the top of Yun-yeung’s circulation. Those winds will cause moderate vertical wind shear. The wind shear is already contributing to the asymmetrical distribution of thunderstorms. The vertical wind shear will inhibit intensification, but the shear will probably not be strong enough to prevent Yun-yeung from strengthening. Tropical Storm Yun-yeung is likely to intensify gradually during the next 24 hours.

Tropical Storm Yun-yeung will move around the northwestern part of high pressure system over the Western North Pacific. The high pressure system will steer Yun-yeung toward the north-northeast during the next 24 hours. On its anticipated track, Tropical Storm Yun-yeung will move closer to Honshu. Yun-yeung could be near Tokyo in 48 hours.

Typhoon Hinnamnor Brings Wind and Rain to South Korea

Typhoon Hinnamnor brought strong gusty winds and heavy rain to South Korea on Monday. At 5:00 p.m. EDT on Monday the center of Typhoon Hinnamnor was located at latitude 35.7°N and longitude 129.2°E which put it about 80 miles (130 km) southwest of Busan, South Korea. Hinnamnor was moving toward the north-northeast at 25 m.p.h. (40 km/h). The maximum sustained wind speed was 105 m.p.h. (165 km/h) and there were wind gusts to 125 m.p.h. (200 km/h). The minimum surface pressure was 964 mb.

Typhoon Hinnamnor was a large, powerful typhoon when it began to affect South Korea. Winds to typhoon force extended out 45 miles (75 km) from the center of Hinnamnor. Winds to tropical storm force extended out 280 miles (455 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Hinnamnor was 17.8. The hurricane Size Index (HSI) was 22.8 and the Hurricane Wind Intensity Size Index (HWISI) was 40.6. Typhoon Hinnamnor was capable of causing widespread serious damage.

Typhoon Hinnamnor will move quickly toward the north-northeast across southeastern South Korea during the next few hours. The strongest winds will occur southeast of a line from Busan to Pohang. Hinnamnor will drop heavy rain over much of South Korea. Heavy rain could cause flash floods in some locations.

Typhoon Hinnamnor will move into an environment unfavorable for a tropical cyclone during the next 24 hours. Hinnamor will move over water where the Sea Surface Temperatures are near 24˚C. It will move under the eastern side of an upper level trough over China. The trough will produce strong southwesterly winds that will blow toward the top of Hinnamnor’s circulation. Typhoon Hinnamnor is likely to make a transition to an extratropical cyclone as it moves over the Sea of Japan during the next 24 hours.

Powerful Typhoon Hinnamnor Heads Toward South Korea

Powerful Typhoon Hinnamnor headed toward South Korea on Sunday night. At 11:00 p.m. EDT on Sunday the center of Typhoon Hinnamnor was located at latitude 30.5°N and longitude 125.3°E which put it about 440 miles (710 km) southwest of Busan, South Korea. Hinnamnor was moving toward the north at 14 m.p.h. (22 km/h). The maximum sustained wind speed was 125 m.p.h. (200 km/h) and there were wind gusts to 155 m.p.h. (250 km/h). The minimum surface pressure was 947 mb.

Typhoon Hinnamnor was a large and dangerous storm as it headed toward South Korea on Sunday night. Winds to typhoon force extended out 80 miles (130 km) from the center of Hinnamnor’s circulation. Winds to tropical storm force extended out 260 miles (420 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Hinnamnor was 23.6. The Hurricane Size Index (HSI) was 29.4 and the Hurricane Wind Intensity Size Index (HWISI) was 53.0. Typhoon Hinnamnor was capable of causing widespread major damage.

The circulation around Typhoon Hinnamnor was very well organized. A small eye with a diameter of 12 miles (19 km) was at the center of Hinnamnor’s 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 Hinnamnor. Storms near the core generated upper level divergence that pumped mass away from the typhoon.

Typhoon Hinnamnor will move into an environment less favorable for a strong typhoon during the next 24 hours. Hinnamnor will move over water where the Sea Surface Temperatures are 28˚C. An upper level trough over China will produce southwesterly winds that will blow toward the top of Hinnamnor’s circulation. Those winds will cause the vertical wind shear to increase during the next 24 hours. Typhoon Hinnamnor will start to weaken when the wind shear increases.

The upper level trough over China will steer Typhoon Hinnamnor toward the northeast during the next 24 hours. On its anticipated track, the center of Typhoon Hinnamnor will be near Jeju Island in 12 hours. Hinnamnor will approach the coast of South Korea near Busan in 18 hours. Although Typhoon Hinnamnor will weaken as it approaches South Korea, it will still be a large, powerful typhoon. Hinnamnor will bring strong gusty winds and locally heavy rain to South Korea. Heavy rain could cause flash floods in some locations. Typhoon Hinnamnor could also bring gusty winds and locally heavy rain to parts of Japan.

Typhoon Hinnamnor Intensifies Back to Equivalent of a Major Hurricane

Typhoon Hinnamnor intensified back to the equivalent of a major hurricane west of Okinawa on Saturday night. At 11:00 p.m. EDT on Saturday the center of Typhoon Hinnamnor was located at latitude 26.6°N and longitude 124.4°E which put it about 205 miles (330 km) west of Okinawa. Hinnamnor was moving toward the north at 12 m.p.h. (19 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.

Typhoon Hinnamnor strengthened back to the equivalent of a major hurricane over the East China Sea west of Okinawa on Saturday night. Two concentric eyewalls appeared to have formed in the middle of Typhoon Hinnamnor. A small inner eye with a diameter of 12 miles (19 km) was that the center of Hinnamnor’s circulation. The inner eye was surrounded by a ring of strong thunderstorms and the strongest winds were occurring in that ring of storms. A much larger, outer eyewall with a diameter of 100 miles (160 km) surrounded the inner eye and eyewall.

The formation of concentric eyewalls caused the size of the circulation around Typhoon Hinnamnor to increase. Winds to typhoon force extended out 70 miles (110 km) from the center of Hinnamnor. Winds to tropical storm force extended out 270 miles (435 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Hinnamnor was 22.1. The Hurricane Size Index (HSI) was 29.3 and the Hurricane Wind Intensity Size Index (HWISI) was 51.4. Typhoon Hinnamnor was capable of causing widespread major damage.

Typhoon Hinnamnor will move through an environment favorable for intensification during the next 24 hours. Hinnamnor will move over water where the Sea Surface Temperatures are 30˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. Typhoon Hinnamnor could intensify until the inner eyewall starts to weaken and an eyewall replacement cycle begins. Hinnamnor will move closer to the upper level westerly winds in the middle latitudes on Monday. The vertical wind shear will increase when that happens and Hinnamnor will weaken.

Typhoon Hinnamnor will move around the western end of a high pressure system over the Western North Pacific Ocean. The high pressure system will steer Hinnamnor toward the north during the next 24 hours. Hinnamnor will move toward northeast when it reaches the westerly winds in the middle latitudes. On its anticipated track Typhoon Hinnamnor will move east of Shanghai in 24 hours. Hinnamnor could approach South Korea in 36 hours.

Typhoon Hinnamnor Brings Wind and Rain to Southern Ryukyu Islands

Typhoon Hinnamnor brought wind and rain to the southern Ryukyu Islands on Saturday morning. At 5:00 a.m. EDT on Saturday the center of Typhoon Hinnamnor was located at latitude 24.1°N and longitude 124.6°E which put it about 35 miles (55 km) east-southeast of Ishigaki, Japan. Hinnamnor was moving toward the north at 7 m.p.h. (11 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 967 mb.

Typhoon Hinnamnor strengthened as it moved slowly through the southern Ryukyu Islands on Saturday morning. A small circular eye formed at the center of Hinnamnor’s circulation. The eye was east of Ishigakijima and southwest of Miyakojima. 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 Hinnamnor. Storms near the core generated upper level divergence that pumped mass away from the typhoon.

Typhoon Hinnamnor had a large circulation. Winds to typhoon force extended out 70 miles (110 km) from the center of Hinnamnor. Winds to tropical storm force extended out 225 miles (360 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Hinnamnor was 16.4. The Hurricane Size Index (HSI) was 22.3 and the Hurricane Wind Intensity Size Index (HWISI) was 38.7. Typhoon Hinnamnor was capable of causing widespread serious damage.

Typhoon Hinnamnor will produce strong gusty winds and locally heavy rain over the southern Ryukyu Islands during the next 12 hours. The eastern side of the eyewall could pass over or close to Miyakojima. Strong winds will be capable of causing serious damage. Heavy rain could cause flash floods in some locations. The winds will not be as strong on Ishigakijima because the western side of the eyewall will pass to the east. Weather conditions will improve gradually when Typhoon Hinnamnor moves farther to the north.

Typhoon Hinnamnor will move through an environment favorable for intensification during the next 24 hours. Hinnamnor will move over water where the Sea Surface Temperatures are 30˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. Typhoon Hinnamnor will intensity during the next 24 hours. Hinnamnor could strengthen to the equivalent of a major hurricane.

Typhoon Hinnamnor will move around the western end of a high pressure system over the Western North Pacific Ocean. The high pressure system will steer Hinnamnor toward the north during the next 36 hours. On its anticipated track Typhoon Hinnamnor will move across the southern Ryukyu Islands during the next 12 hours. The center of Hinnamnor will be west of Okinawa in 24 hours. Typhoon Hinnamnor could be southeast of Shanghai in 36 hours.

Typhoon Hinnamnor Stalls near Southern Ryukyu Islands

Typhoon Hinnamnor stalled near the southern Ryukyu Islands on Thursday. At 11:00 p.m. EDT on Thursday the center of Typhoon Hinnamnor was located at latitude 21.7°N and longitude 125.3°E which put it about 200 miles (320 km) south-southeast of Ishigaki, Japan. Hinnamnor was moving toward the northwest at 2 m.p.h. (3 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 960 mb.

Typhoon Hinnamnor stalled and weakened southeast of the southern Ryukyu Islands on Thursday. When Hinnamnor stalled, strong winds in the lower levels of the atmosphere mixed cooler water to the surface of the Western North Pacific. Typhoon Hinnamnor was unable to extract enough energy from the upper ocean to maintain its intensity and it weakened. The northern and western parts of the eyewall weakened. Most of the thunderstorms were occurring in bands in the eastern and southern parts of Hinnamnor’s circulation. Bands in the northern and western parts of the circulation consisted primarily of showers and lower clouds. Storms near the center of Hinnamnor still generated upper level divergence that pumped mass away from the typhoon.

The size of the circulation around Typhoon Hinnamnor increased on Thursday when the typhoon weakened. Winds to typhoon force extended out 35 miles (55 km) from the center of Hinnamnor. Winds to tropical storm force extended out 230 miles (370 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Hinnamnor was 19.2. The Hurricane Size Index (HSI) was 13.8 and the Hurricane Wind Intensity Size Index (HWISI) was 33.0. Typhoon Hinnamnor was capable of causing regional serious damage.

A high pressure system over the Western North Pacific Ocean will start to steer Typhoon Hinnamnor toward the north during the next 24 hours. On its anticipated track Typhoon Hinnamnor will approach the southern Ryukyu Islands in 24 hours. Hinnamnor will bring strong winds and locally heavy rain to the southern Ryukyu Islands. Heavy rain could cause flash floods in some locations.

Typhoon Hinnamnor will move through an environment unfavorable for intensification during the next 24 hours. The core of Hinnamnor will still be over cooler water that was mixed to the surface for much of Friday. An upper level ridge over China will produce northerly winds that will blow toward the top of Hinnamnor’s circulation. Those winds will cause vertical wind shear which will inhibit intensification. Typhoon Hinnamnor could weaken further during the next 24 hours. Hinnamnor will move over water where the Sea Surface Temperatures are 30˚C during the weekend, when it moves north of the cooler water that has been mixed to the surface. Typhoon Hinnamnor could strengthen again when it moves over warmer water..

Typhoon Hinnamnor Strengthens Back to Equivalent of Cat. 5 Hurricane

Typhoon Hinnamnor strengthened back to the equivalent of a Category 5 hurricane on the Saffir-Simpson southeast of the southern Ryukyu Islands on Wednesday night. At 11:00 p.m. EDT on Wednesday the center of Typhoon Hinnamnor was located at latitude 22.4°N and longitude 125.7°E which put it about 165 miles (270 km) southeast of Ishigaki, Japan. Hinnamnor was moving toward the south-southwest at 17 m.p.h. (28 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 Hinnamnor intensified back to the equivalent of a Category 5 hurricane after the completion of an eyewall replacement cycle southeast of the southern Ryukyu Islands. A circular eye with a diameter of 20 miles (32 km) was at the center of Hinnamnor. 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 Hinnamnor. Storms near the core generated strong upper level divergence that pumped large quantities of mass away from the typhoon.

The circulation around Typhoon Hinnamnor began to contract again after the completion of the eyewall replacement cycle. Winds to typhoon force extended out 45 miles (75 km) from the center of Hinnamnor. Winds to tropical storm force extended out 100 miles (160 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Hinnamnor was 35.0. The Hurricane Size Index (HSI) was 15.1 and the Hurricane Wind Intensity Size Index (HWISI) was 50.1. Hinnamnor was capable of causing regional catastrophic damage.

Typhoon Hinnamnor will move through an environment capable of supporting a strong typhoon during the next 24 hours. Hinnamnor will move over water where the Sea Surface Temperatures are 30˚C. It will move through region where the upper level winds are weak and there there will be little vertical wind shear. Typhoon Hinnamnor could maintain its intensity during the next 24 hours unless concentric eyewalls form again.

Typhoon Hinnamnor will finish absorbing the circulation of Tropical Depression 13W that is located southeast of Okinawa during the next 24 hours. At 11:00 p.m. EDT on Wednesday the center of Tropical Depression 13W was located at at latitude 24.5°N and longitude 129.0°E which put it about 185 miles (300 km) southeast of Okinawa. The tropical depression was moving toward the northwest at 17 m.p.h. (28 km/h). The maximum sustained wind speed was 30 m.p.h. (50 km/h) and there were wind gusts to 40 m.p.h. (65 km/h). The minimum surface pressure was 1003 mb.

Typhoon Hinnamnor will moved toward the southwest during the next 24 hours as it finishes the absorption of Tropical Depression 13W. On its anticipated track, Typhoon Hinnamnor will move south of the southern Ryukyu Islands during the next 24 hours. Hinnamnor could be in an area where the steering winds are weak after it absorbs the tropical depression. Typhoon Hinnamnor could start to move toward the north back toward the southern Ryukyu Islands on Friday.