Tag Archives: HWISI

Tropical Cyclone Bheki Weakens Over South Indian Ocean

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Tropical Cyclone Bheki weakened over the South Indian Ocean on Monday.  At 4:00 p.m. EST on Monday the center of Tropical Cyclone Bheki was located at latitude 17.7°S and longitude 68.1°E which put the center about 345 miles (555 km) east-northeast of Rodrigues.  Bheki was moving toward the west-southwest at 6 m.p.h. (10 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 976 mb.

More vertical wind shear caused Tropical Cyclone Bheki to weaken on Monday as it moved over the South Indian Ocean.  It was no longer possible to detect an eye on satellite images of Bheki.  Thunderstorms were still occurring around the center of Bheki’s circulation.  Those thunderstorms generated upper level divergence that pumped mass away to the east of the tropical cyclone.  Bands of showers and thunderstorms were revolving around the core of Tropical Cyclone Bheki.

There was still a large area of strong winds in Tropical Cyclone Bheki.  Winds to hurricane/typhoon force extended out 65 miles (105 km) from the center of Bheki’s circulation. Winds to tropical storm force extended out 140 miles (225 km) from the center of Tropical Cyclone Bheki.

The Hurricane Intensity Index (HII) for Tropical Cyclone Bheki was 12.7.  The Hurricane Size Index (HSI) was 19.2 and the Hurricane Wind Intensity Size INdex (HWISI) was 31.9.  Tropical Cyclone Bheki was similar in intensity to Hurricane Matthew when Matthew hit North Carolina  in 2016.  Bheki was bigger than Matthew was.

Tropical Cyclone Bheki will continue to move through an environment that will be unfavorable for intensification during the next 24 hours.  Bheki will move over water where where the Sea Surface Temperatures are near 26°C.  It will move under the eastern side of an upper level trough over the South Indian Ocean.  The upper level level trough will produce northwesterly winds that will blow toward the top of Bheki’s circulation.  Those upper level winds will cause the moderate vertical wind shear. Tropical Cyclone Bheki will weaken during the next 24 hours because of the moderate vertical wind shear.

Tropical Cyclone Bheki will move around the northwestern part of a high pressure system over the South Indian Ocean.  The high pressure system will steer Bheki toward the west-southwest during the next 24 hours.  On its anticipated track, the center Tropical Cyclone Bheki will approach Rodrigues in 24 hours.

Tropical Cyclone Bheki will bring gusty winds and locally heavy rain to Rodrigues.  Heavy rain could cause flash floods in some locations.

Tropical Cyclone Bheki Strengthens to Equivalent of Cat. 4 Hurricane

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Tropical Cyclone Bheki strengthened to the equivalent of a Category 4 hurricane on the Saffir-Simpson Scale as it moved over the South Indian Ocean on Sunday.  At 4:00 p.m. EST on Sunday the center of Tropical Cyclone Bheki was located at latitude 16.9°S and longitude 69.7°E which put the center about 475 miles (765 km) east-northeast of Rodrigues.  Bheki was moving toward the southwest at 6 m.p.h. (10 km/h).  The maximum sustained wind speed was 130 m.p.h. (210 km/h) and there were wind gusts to 160 m.p.h. (260 km/h).  The minimum surface pressure was 947 mb.

Tropical Cyclone Bheki intensified to the equivalent of a Category 4 hurricane on Sunday.  A small circular eye was present at the center of Bheki’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 thunderstorm were revolving around the center of Tropical Cyclone Bheki. Storms near the center of Bheki’s circulation generated upper level divergence that pumped mass away from the tropical cyclone. The removal of mass caused the surface pressure to decrease.

The circulation around Tropical Cyclone Bheki was symmetrical. Winds to hurricane/typhoon force extended out 65 miles (105 km) from the center of Bheki’s circulation.  Winds to tropical storm force extended out 130 miles (210 km) from the center of Tropical Cyclone Bheki.

The Hurricane Intensity Index (HII) for Tropical Cyclone Bheki was 25.1. The Hurricane Size Index (HSI) was 20.3 and the Hurricane Wind Intensity Size INdex (HWISI) was 45.4. Tropical Cyclone Bheki was similar in intensity to Hurricane Harvey when Harvey hit Texas in 2017. Bheki was bigger than Harvey was.

Tropical Cyclone Bheki will move through an environment that will become unfavorable for intensification during the next 24 hours.  Bheki will move over water where where the Sea Surface Temperatures are near 27°C.  An upper level trough will approach Bheki from the west.  The upper level level trough will produce northwesterly winds that will blow toward the top of Bheki’s circulation.  Those upper level l winds will cause the vertical wind shear to increase.  Tropical Cyclone Bheki will weaken during the next 24 hours because of more vertical wind shear.

Tropical Cyclone Bheki will move around the northwestern part of a high pressure system over the South Indian Ocean.  The high pressure system will steer Bheki toward the southwest during the next 24 hours.  On its anticipated track, the center Tropical Cyclone Bheki will pass north of Rodrigues in two days..

Typhoon Man-yi Hits Luzon

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Powerful Typhoon Man-yi hit Luzon on Sunday morning.  At 4:00 a.m. EST on Sunday the center of Typhoon Man-yi was located at latitude 16.2°N and longitude 121.3°E which put the center about 25 miles (40 km) north of Baler, Philippines.  Man-yi was moving toward the northwest at 15 m.p.h. (24 km/h).  The maximum sustained wind speed was 150 m.p.h. (240 km/h) and there were wind gusts to 185 m.p.h. (295 km/h).  The minimum surface pressure was 933 mb.

The center of Typhoon Man-yi made landfall on the east coast of Luzon near Baler on Sunday morning.  Man-yi was the equivalent of a Category 4 hurricane on the Saffir-Simpson Scale at the time of landfall.  A circular eye with a diameter of 17 miles (28 km) was at the center of Typhoon Man-yi.  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 Man-yi’s circulation.

The circulation around Typhoon Man-yi was very symmetrical.  Winds to typhoon force extended out 40 miles (65 km) from the center of Man-yi’s circulation.  Winds to tropical storm force extended out 130 miles (210 km) from the center of Typhoon Man-yi.

The Hurricane Intensity Index (HII) for Typhoon Man-yi was 31.6.  The Hurricane Size Index (HSI) was 16.0 and the Hurricane Wind Intensity Size Index (HWISI) was 47.6. Typhoon Man-yi was similar in size and intensity to Hurricane Laura when Laura hit Southwest Louisiana in 2020.

Typhoon Man-yi will move around the southern side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Man-yi toward the northwest during the next 24 hours.  On its anticipated track, Typhoon Man-yi will move across Luzon during the rest of today.

Typhoon Man-yi will also bring very strong winds and heavy rain to Luzon. Heavy rain will cause flash floods and mudslides.  Man-yi could also cause a storm surge of up to 13 feet (4 meters) along the coast of Luzon.  Luzon has already been hit by a series of in recent weeks. Typhoon Man-yi is capable of causing regional severe damage.  Man-yi will seriously set back efforts to recover from the previous typhoons.

Tropical Cyclone Bheki Intensifies to Equivalent of a Major Hurricane

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Tropical Cyclone Bheki intensified to the equivalent of a major hurricane over the South Indian Ocean on Saturday.  At 4:00 p.m. EST on Saturday the center of Tropical Cyclone Bheki was located at latitude 15.4°S and longitude 71.4°E which put the center about 610 miles (980 km) east-northeast of Rodrigues.  Bheki was moving toward the southwest at 9 m.p.h. (15 km/h). The maximum sustained wind speed was 115 m.p.h. (185 km/h) and there were wind gusts to 145 m.p.h. (235 km/h).  The minimum surface pressure was 961 mb.

Tropical Cyclone Bheki strengthened to the equivalent of a Category 3 hurricane on the Saffir-Simpson Scale on Saturday.  A circular eye formed at the center of Bheki’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 thunderstorm were revolving around the center of Tropical Cyclone Bheki.  Storms near the center of Bheki’s circulation generated upper level divergence that pumped mass away from the tropical cyclone.  The removal of mass caused the surface pressure to decrease.

The size of the circulation around Tropical Cyclone Bheki increased on Saturday when Bheki intensified.  Winds to hurricane/typhoon force extended out 65 miles (105 km) from the center of Bheki’s circulation.  Winds to tropical storm force extended out 150 miles (240 km) from the center of Tropical Cyclone Bheki.

The Hurricane Intensity Index (HII) for Tropical Cyclone Bheki was 20.6.  The Hurricane Size Index (HSI) was 18.7 and the Hurricane Wind Intensity Size INdex (HWISI) was 39.3.  Tropical Cyclone Bheki was similar in intensity to Hurricane Rita when Rita hit Southwest Louisiana in 2005.  Bheki was a little smaller than Rita was.

Tropical Cyclone Bheki will move through an environment favorable for intensification during the next 24 hours.  Bheki will move over water where where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge over the South Indian Ocean.  The upper level winds are weak near the middle of the upper level ridge and there will be little vertical wind shear.  Tropical Cyclone Bheki is likely to continue to intensify during the next 24 hours.

Tropical Cyclone Bheki will move around the northwestern part of a high pressure system over the South Indian Ocean.  The high pressure system will steer Bheki toward the southwest during the next 24 hours.  On its anticipated track, Tropical Cyclone Bheki will move toward Rodrigues.

Typhoon Man-yi Intensifies to Equivalent of Cat. 5 Hurricane

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Typhoon Man-yi intensified to the equivalent of a Category 5 hurricane on the Saffir-Simpson Scale on Saturday.  At 10:00 a.m. EST on Saturday the center of Typhoon Man-yi was located at latitude 14.2°N and longitude 124.0°E which put the center about 80 miles (130 km) east of Labo, Philippines.  Man-yi was moving toward the northwest at 15 m.p.h. (24 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 921 mb.

Typhoon Man-yi intensified to the equivalent of a Category 5 hurricane as it approached southeastern Luzon on Saturday.  The southwestern part of Man-yi’s eyewall passed over Catanduanes Island.

Typhoon Man-yi was very impressive on satellite images.  A circular eye with a diameter of 20 miles (32 km) was at the center of Man-yi’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 center of Man-yi’s circulation.  Storms near the center of Man-yi generated strong upper level divergence that pumped large amounts of mass away from the typhoon in all directions. The removal of large quantities of mass caused the surface pressure to decrease rapidly.

The size of the circulation around Typhoon Man-yi increased when Man-yi intensified.  Winds to typhoon force extended out 45 miles (75 km) from the center of Man-yi’s circulation.  Winds to tropical storm force extended out 150 miles (240 km) from the center of Typhoon Man-yi.

The Hurricane Intensity Index (HII) for Typhoon Man-yi was 35.0.  The Hurricane Size Index (HSI) was 17.6 and the Hurricane Wind Intensity Size Index (HWISI) was 52.6.  Typhoon Man-yi was similar in intensity to Hurricane Michael when Michael hit Northwest Florida in 2018.  Man-yi was bigger than Michael was.

Typhoon Man-yi will move through an environment favorable for intensification during the next few hours.  Man-yi will move over water where where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge over the Western North Pacific Ocean.  The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear.  Typhoon Man-yi could continue to intensify during the next few hours.  However, the fact that the southwestern part of Man-yi’s eyewall passed over Catanduanes Island could halt its intensification.

Typhoon Man-yi will move around the southern side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Man-yi toward the northwest during the next 24 hours.  On its anticipated track, Typhoon Man-yi will reach southeastern Luzon in 12 hours.  The center of Man-yi’s circulation could make landfall northeast of Baler.

Typhoon Man-yi is already bringing destructive winds to Catanduanes Island.  Typhoon Man-yi will also bring very strong winds and heavy rain to Luzon.  Heavy rain will cause flash floods and mudslides.  Man-yi could also cause a storm surge of up to 13 feet (4 meters) along the coast of Luzon. Luzon has already been hit by a series of in recent weeks.  Typhoon Man-yi is capable of causing regional catastrophic damage.  Man-yi will seriously set back efforts to recover from the previous typhoons.

Elsewhere over the Western North Pacific Ocean, Tropical Depression Usagi was still dropping heavy rain on parts of Taiwan. At 4:00 a.m. EST on Saturday the center of Tropical Depression Usagi was located at latitude 22.3°N and longitude 120.7°E which put the center about 35 miles (55 km) south of Kaohsiung, Taiwan.  Usagi was moving toward the southeast at 4 m.p.h. (6 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 1006 mb.  Continued heavy rain is likely to cause flash floods in Taiwan.

Typhoon Man-Yi Strengthens to Equivalent of a Major Hurricane

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Typhoon Man-yi strengthened to the equivalent of a major hurricane as it moved toward the Philippines on Friday.  At 4:00 p.m. EST on Friday the center of Typhoon Man-yi was located at latitude 12.3°N and longitude 127.2°E which put the center about 490 miles (790 km) east-southeast of Manila, Philippines.  Man-yi was moving toward the west-northwest at 15 m.p.h. (24 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 952 mb.

Typhoon Man-yi intensified to the equivalent of a major hurricane on Friday.  A circular eye with a diameter of 25 miles (40 km) was at the center of Man-yi’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 center of Man-yi’s circulation.  Storms near the center of Man-yi generated strong upper level divergence that pumped mass away from the typhoon in all directions.  The removal of large quantities of mass caused the surface pressure to decrease rapidly.

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

The Hurricane Intensity Index (HII) for Typhoon Man-yi was 23.6.  The Hurricane Size Index (HSI) was 10.3 and the Hurricane Wind Intensity Size Index (HWISI) was 33.9.  Typhoon Man-yi was similar in size and intensity to Hurricane Dennis when Dennis hit Northwest Florida in 2005.

Typhoon Man-yi will move through an environment favorable for intensification during the next 24 hours.  Man-yi will move over water where where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge over the Western North Pacific Ocean.  The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear.  Typhoon Man-yi is likely to continue to intensify during the next 24 hours.

Typhoon Man-yi will move around the southern side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Man-yi toward the west-northwest during the next 24 hours.  On its anticipated track, Typhoon Man-yi will reach southeastern Luzon in less than 18 hours.

Typhoon Man-yi will bring very strong winds and heavy rain to Luzon.  Heavy rain will cause flash floods and mudslides.  Man-yi could also cause a storm surge of up to 13 feet (4 meters) along the coast of Luzon.  Luzon has already been hit by a series of in recent weeks.  Typhoon Man-yi is capable of causing regional major damage.  Man-yi will seriously set back efforts to recover from the previous typhoons.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Usagi was bringing wind and rain to Taiwan.  At 4:00 p.m. EST on Friday the center of Tropical Storm Usagi was located at latitude 22.5°N and longitude 120.3°E which put the center about 25 miles (40 km) southwest of Kaohsiung, Taiwan.  Usagi was moving toward the north-northeast at 10 m.p.h. (16 km/h).  The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h).  The minimum surface pressure was 998 mb.  Heavy rain is likely to cause flash floods in Taiwan.

Typhoon Usagi Hits Northern Luzon

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Typhoon Usagi hit northern Luzon on Wednesday night.  At 10:00 p.m. EST on Wednesday the center of Typhoon Usagi was located at latitude 17.6°N and longitude 122.7°E which put the center about 1205 miles (195 km) southeast of Aparri, Philippines.  Usagi was moving toward the northwest at 14 m.p.h. (22 km/h). The maximum sustained wind speed was 150 m.p.h. (240 km/h) and there were wind gusts to 185 m.p.h. (295 km/h).  The minimum surface pressure was 915 mb.

Typhoon Usagi rapidly intensified to the equivalent of a Category 4 hurricane on the Saffir-Simpson Scale east of Luzon on Wednesday.  A small circular eye with a diameter of 5 miles (8 km) was at the center of Usagi’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 revolved around the core of Typhoon Usagi.  Storms near the core of Usagi generated strong upper level divergence that pumped large quantities of mass away from the typhoon in all directions.  The removal of large amounts of mass caused the surface pressure to decrease rapidly.  The inner end of a rainband wrapped around the existing eye and eyewall at the center of Usagi’s circulation during Wednesday evening and concentric eyewalls could be forming.

The circulation around Typhoon Usagi was small.  Winds to typhoon force extended out 30 miles (50 km) from the center of Usagi’s circulation.  Winds to tropical storm force extended out 85 miles (135 km) from the center of Typhoon Usagi.

The Hurricane Intensity Index (HII) for Typhoon Usagi was 31.6.  The Hurricane Size Index (HSI) was 9.4 and the Hurricane Wind Intensity Size Index (HWISI) was 41.0 . Typhoon Usagi was similar in size to Hurricane Ida when Ida hit Louisiana in 2021.  Usagi was not as big as Ida was.

Typhoon Usagi will move around the southern side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Usagi toward the northwest during the next 24 hours.  On its anticipated track, the center of Typhoon Usagi will move across northeast Luzon during the next few hours.

Typhoon Usagi will bring strong winds and heavy rain to northern Luzon.  Heavy rain could cause flash floods and mudslides in some locations.  Usagi could cause a storm surge of up to 13 feet ( 4 meters) on the coast of northeastern Luzon.  The area likely to be hit by Usagi was just hit by Typhoon Toraji a few days ago.  Typhoon Usagi will complicate recovery efforts in Luzon.

Elsewhere over the Western North Pacific Ocean, former Tropical Storm Toraji weakened to a tropical depression south of Hong Kong, and Tropical Storm Man-yi was moved north of Yap.

At 10:00 p.m. EST on Wednesday the center of Tropical Depression Toraji was located at latitude 21.0°N and longitude 113.9°E which put the center about 90 miles (145 km) south of Hong Kong.  Toraji was moving toward the west-southwest at 5 m.p.h. (8 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 1005 mb.

At 10:00 p.m. EST on Wednesday the center of Tropical Storm Man-yi was located at latitude 11.1°N and longitude 137.0°E which put the center about 120 miles (195 km) north of Yap. Man-yi was moving toward the west-southwest at 20 m.p.h. (32 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 1000 mb.

Typhoon Usagi Rapidly Intensifies to Equivalent of a Major Hurricane

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Typhoon Usagi rapidly intensified to the equivalent of a major hurricane over the Western North Pacific Ocean east of Luzon on Wednesday.  At 10:00 a.m. EST on Wednesday the center of Typhoon Usagi was located at latitude 16.5°N and longitude 124.8°E which put the center about 485 miles (780 km) east-southeast of Aparri, Philippines.  Usagi was moving toward the west-northwest at 15 m.p.h. (24 km/h).  The maximum sustained wind speed was 130 m.p.h. (210 km/h) and there were wind gusts to 160 m.p.h. (260 km/h).  The minimum surface pressure was 949 mb.

Typhoon Usagi rapidly intensified to the equivalent of a Category 4 hurricane on the Saffir-Simpson Scale east of Luzon on Wednesday.  A small circular eye with a diameter of 5 miles (8 km) formed at the center of Usagi’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 revolved around the core of Typhoon Usagi.  Storms near the core of Usagi generated strong upper level divergence that pumped large quantities of mass away from the typhoon in all directions.  The removal of large amounts of mass caused the surface pressure to decrease rapidly.

The circulation around Typhoon Usagi was small.  Winds to typhoon force extended out 30 miles (50 km) from the center of Usagi’s circulation.  Winds to tropical storm force extended out 80 miles (130 km) from the center of Typhoon Usagi.

The Hurricane Intensity Index (HII) for Typhoon Usagi was 25.1.  The Hurricane Size Index (HSI) was 9.4 and the Hurricane Wind Intensity Size Index (HWISI) was 34.5.  Typhoon Usagi was similar in size to Hurricane Harvey when Harvey hit Texas in 2017.  Usagi was not as big as Harvey was.

Typhoon Usagi will move through an environment favorable for intensification during the next 24 hours.  Usagi will move over water where the Sea Surface Temperatures are near 30°C.  It will move under the axis of an upper level ridge over the Western North Pacific Ocean.  The upper level winds are weak near the axis of the ridge and there will be little vertical wind shear.  Typhoon Usagi could continue to intensify during the next 24 hours.  However, since the core of Usagi’s circulation is so small, the inner end of a rainband could wrap around the core.  If concentric eyewalls form, an eyewall replacement cycle would halt the intensification of Typhoon Usagi.

Typhoon Usagi will move around the southern side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Usagi toward the west-northwest during the next 24 hours.  On its anticipated track, the center of Typhoon Usagi will move near northeast Luzon in 18 hours.

Typhoon Usagi will bring strong winds and heavy rain to northern Luzon.  Heavy rain could cause flash floods and mudslides in some locations.  Usagi could cause a storm surge of up to 13 feet ( 4 meters) on the coast of northeastern Luzon.  The area likely to be hit by Usagi was just hit by Typhoon Toraji a few days ago.  Typhoon Usagi will complicate recovery efforts in Luzon.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Toraji was approaching the coast of China east of Hong Kong, and Tropical Storm Man-yi was moving away from the Marianas.

At 10:00 a.m. EST on Wednesday the center of Tropical Storm Toraji was located at latitude 21.9°N and longitude 114.9°E which put the center about 65 miles (105 km) east-southeast of Hong Kong.  Toraji was moving toward the north at 14 m.p.h. (22 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.

At 10:00 a.m. EST on Wednesday the center of Tropical Storm Man-yi was located at latitude 11.7°N and longitude 140.4°E which put the center about 280 miles (450 km) west-southwest of Guam.  Man-yi was moving toward the west-southwest at 16 m.p.h. (26 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 1002 mb.

Typhoon Toraji Brings Wind and Rain to Luzon

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Typhoon Toraji brought wind and rain to Luzon on Sunday night.  At 10:00 p.m. EST on Sunday the center of Typhoon Toraji was located at latitude 16.7°N and longitude 121.8°E which put the center about 25 miles (40 km) east of Echague, Philippines.  Toraji was moving toward the west-northwest at 13 m.p.h. (20 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 970 mb.

The center of Typhoon Toraji made landfall on the coast of Luzon east of Echague on Sunday night.  Toraji was a relatively small typhoon at the time of landfall.  Winds to typhoon force extended out 30 miles (50 km) from the center of Toraji’s circulation.  Winds to tropical storm force extended out 90 miles from the center of Typhoon Toraji.

The Hurricane Intensity Index (HII) for Typhoon Toraji was 13.9. The Hurricane Size Index (HSI) was 7.7. and the Hurricane Wind Intensity Size Index (HWISI) was 21.6. Typhoon Toraji was similar in size and intensity to Hurricane Isaias when Isaias hit North Carolina in 2020.

Typhoon Toraji will move around the southern side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Toraji toward the west-northwest during the next 24 hours.  On its anticipated track, the Typhoon Toraji will move across northern Luzon during the next 12 hours.

Typhoon Toraji will bring strong winds and locally heavy rain to northern Luzon.  Heavy rain is likely to cause flash floods and mudslides.  Toraji will also cause a storm surge of up to 9 feet (2.7 meters) along the coast of northeastern Luzon.  Northern Luzon is trying to recover from the damage caused by two recent typhoons.  Typhoon Toraji will seriously disrupt those recovery activities.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Yinxing continued to weaken over the South China Sea, Tropical Storm Man-yi continued to move toward the Marianas, and a new tropical depression formed west of Guam.

At 10:00 p.m. EST on Sunday the center of Tropical Storm Yinxing was located at latitude 16.7°N and longitude 111.3°E which put the center about 225 miles (365 km) east-northeast of Da Nang, Vietnam.  Yinxing was moving toward the south-southwest at 14 m.p.h. (22 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 993 mb.

At 10:00 p.m. EST on Sunday the center of Tropical Storm Man-yi was located at latitude 15.1°N and longitude 152.2°E which put the center about 460 miles (740 km) east of Saipan.  Man-yi was moving toward the west-southwest at 12 m.p.h. (19 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 1002 mb.

At 10:00 p.m. EST on Sunday the center of Tropical Depression Twentyseven-W was located at latitude 12.7°N and longitude 138.5°E which put the center about 370 miles (595 km) west of Guam.  The tropical depression was moving toward the northwest at 18 m.p.h. (30 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. (60 km/h).  The minimum surface pressure was 999 mb.

Toraji Rapidly Intensifies to a Typhoon East of Luzon

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Former Tropical Storm Toraji rapidly intensified to a typhoon east of Luzon on Sunday.  At 4:00 p.m. EST on Sunday the center of Typhoon Toraji was located at latitude 16.2°N and longitude 122.7°E which put the center about 85 miles (135 km) east-southeast of Echague, Philippines. Toraji was moving toward the west-northwest at 13 m.p.h. (20 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 970 mb.

Former Tropical Storm Toraji rapidly intensified to a typhoon over the Western North Pacific Ocean east of Luzon on Sunday.  The inner end of a rainband wrapped around the center of Toraji’s circulation.  An eye formed at the center of Typhoon Toraji.  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 revolved around the center of Toraji’s circulation.  Storms near the center of Toraji generated upper level divergence that pumped more mass away from the typhoon.  The removal of more mass caused the surface pressure to decrease rapidly.

The circulation around Typhoon Toraji was small.  Winds to typhoon force extended out 30 miles (50 km) from the center of Toraji’s circulation.  Winds to tropical storm force extended out 90 miles (145 km) from the center of Typhoon Toraji.

The Hurricane Intensity Index (HII) for Typhoon Toraji was 13.9.  The Hurricane Size Index (HSI) was 7.7. and the Hurricane Wind Intensity Size Index (HWISI) was 21.6.  Typhoon Toraji was similar in size and intensity to Hurricane Isaias when Isaias hit North Carolina in 2020.

Typhoon Toraji will move through an environment favorable for intensification during the next few hours. Toraji will move over water where the Sea Surface Temperatures are near 30°C.  It will move under axis of an upper level ridge over the Western North Pacific Ocean.  The upper level winds are weak near the axis of the ridge and there will be little vertical wind shear.  Typhoon Toraji will continue to intensify during the next few hours.

Typhoon Toraji will move around the southern side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Toraji toward the west-northwest during the next 24 hours.  On its anticipated track, the center Typhoon Toraji will reach Luzon in a few hours.

Typhoon Toraji will bring strong winds and locally heavy rain to northern Luzon.  Heavy rain is likely to cause flash floods and mudslides.  Toraji will also cause a storm surge of up to 9 feet (2.7 meters) along the coast of northeastern Luzon.  Northern Luzon is trying to recover from the damage caused by two recent typhoons.  Typhoon Toraji will seriously disrupt those recovery activities.

Elsewhere over the Western North Pacific Ocean, former Typhoon Yinxing weakened rapidly over the South China Sea and Tropical Storm Man-yi moved closer to the Marianas.

At 4:00 p.m. EST on Sunday the center of Tropical Storm Yinxing was located at latitude 17.8°N and longitude 111.7°E which put the center about 290 miles (465 km) east-northeast of Da Nang, Vietnam.  Yinxing was moving toward the southwest at 10 m.p.h. (16 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 988 mb.

At 4:00 p.m. EST on Sunday the center of Tropical Storm Man-yi was located at latitude 15.2°N and longitude 153.4°E which put the center about 540 miles (870 km) east of Saipan.  Man-yi was moving toward the southwest at 10 m.p.h. (16 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 999 mb.