Tag Archives: Da Nang

Koto Weakens Back to a Tropical Storm

Leave a reply

Former Typhoon Koto weakened back to a tropical storm over the South China Sea on Thursday.  At 4:00 p.m. EST on Thursday the center of Tropical Storm Koto was located at latitude 12.3°N and longitude 113.5°E which put the center about 435 miles (705 km) southeast of Da Nang, Vietnam.  Koto was moving toward the south-southwest at 5 m.p.h. (8 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 986 mb.

Former Typhoon Koto moved into a region of drier air and weakened back to a tropical storm over the South China Sea on Thursday.  A high pressure system over China was pumping drier air over the South China Sea.  Many of the thunderstorms in Tropical Storm Koto weakened when the drier air was pulled into Koto’s circulation.  Most of the remaining thunderstorms were occurring in bands in the northwestern part of Tropical Storm Koto.  Bands in the other parts of Koto’s circulation consisted primarily of showers and lower clouds.

Storms near the center of Tropical Storm Koto generated less upper level divergence.  The removal of mass in the upper levels of Koto’s circulation was less than the inflow of mass in the lower levels of the atmosphere.  As a result, the surface pressure was increasing.

The distribution of wind speeds in Tropical Storm Koto continued to be very asymmetrical.  Winds to tropical storm force extended out 205 miles (335 km) in the northern side of Koto’s circulation.  Winds to tropical storm force extended out 70 miles (110 km) in the southern side of Tropical Storm Koto.

Tropical Storm Koto will move through an environment that will be unfavorable for intensification during the next 24 hours.  Koto will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the southern part of an upper level ridge that is over the Western North Pacific Ocean.  The upper level ridge will produce southeasterly winds that will blow toward the top of Koto’s circulation.  Those winds will cause moderate vertical wind shear.  In addition, Tropical Storm Koto will continue to move through the region of drier air that is over the western part of the South China Sea.  Moderate vertical wind shear and the effects of drier air will cause Tropical Storm Koto to continue to weaken during the next 24 hours.

Tropical Storm Koto will be in a region where the steering currents are weak during the next 24 hours.  On its anticipated track, Tropical Storm Koto is likely to meander slowly over the South China Sea on Friday.

Koto Intensifies to a Typhoon Over South China Sea

Leave a reply

Former Tropical Storm Koto intensified to a typhoon over the South China Sea on Wednesday.   At 4:00 p.m. EST on Wednesday the center of Typhoon Koto was located at latitude 13.2°N and longitude 114.5°E which put the center about 475 miles (765 km) east-southeast of Da Nang, Vietnam.  Koto was moving toward the northwest at 12 m.p.h. (19 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 982 mb.

Former Tropical Storm Koto intensified to a typhoon on Wednesday.  Thunderstorms continued to develop around the center of Typhoon Koto.  Bands of showers and thunderstorms were revolving around the center of Koto’s circulation.  Storms near the center of Koto generated upper level divergence that pumped mass away from the tropical storm.  The removal of mass caused the surface pressure to decrease.

The distribution of wind speeds around Typhoon Koto was asymmetrical.  Winds to typhoon force extended out 30 miles from the center of Koto’s circulation.  Winds to tropical storm force extended out 205 miles (335 km) in the northern side of Koto’s circulation.  Winds to tropical storm force extended out 70 miles (110 km) in the southern side of Typhoon Koto.

Typhoon Koto will move through an environment that will become unfavorable for intensification during the next 24 hours.  Koto 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 that is over the Western North Pacific Ocean.  The upper level ridge will produce easterly winds that will blow toward the top of Koto’s circulation.  Those winds will cause the vertical wind shear to increase.  In addition, Typhoon Koto will move into a region of drier air that is flowing over the western part of the South China Sea.  Some of the drier air is likely to get pulled into the western side of Koto’s circulation.  More vertical wind shear and the effects of drier air will cause Typhoon Koto to start to weaken during the next 24 hours.

Typhoon Koto will move around the southern side of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Koto toward the west during the next 24 hours.  On its anticipated track, Typhoon Koto will move closer to Vietnam.  A second high pressure system over China and Southeast Asia that is transporting the drier air over the western part of the South China Sea will impede the progress of Koto later this week.  Koto could meander over the South China Sea for several days at the end of the week.

Tropical Storm Fengshen Moves Toward Vietnam

Tropical Storm Fengshen moved toward Vietnam on Monday.  At 11:00 p.m. EDT on Monday the center of Tropical Storm Fengshen was located at latitude 17.3°N and longitude 112.2°E which put the center about 290 miles (465 km) east-northeast of Da Nang, Vietnam.  Fengshen was moving toward the southwest at 8 m.p.h. (13 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 993 mb.

Drier air was pulled around the western and southern sides of Tropical Storm Fengshen on Monday.  Bands in the western and southern sides of Fengshen’s circulation consisted primarily of showers and lower clouds.  Thunderstorms were still occurring in bands in the northern and eastern sides of Tropical Storm Fengshen.  Storms near the center of Fengshen still generated upper level divergence that pumped mass away from the tropical storm.  The removal of mass in the upper levels was nearly equal to the inflow of mass in the lower levels of the atmosphere.  So, the surface pressure remained relatively constant on Monday.

The circulation around the northern side of Tropical Storm Fengshen was interacting with a high pressure system over China.  So, tropical storm force winds extended out much farther in the northern half of Fengshen.  Winds to tropical storm force extended out 250 miles (400 km) in the northern side of Tropical Storm Fengshen.  Winds to tropical storm force extended out 140 miles (225 km) in the southern half of Fengshen’s circulation.

Tropical Storm Fengshen will move through an environment marginally favorable for intensification during the next 24 hours.  Fengshen will move over water where the Sea Surface Temperatures are near 28°C.  It will move under the middle of an upper level ridge that is 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.  Drier air will continue to be pulled around the northern and western sides of Fengshen’s circulation.  The drier air will inhibit intensification.  Tropical Storm Fengshen is likely to maintain its intensity during the next 24 hours.

Tropical Storm Fengshen will move around the southern side of a high pressure system that is over China.  The high pressure system will steer Fengshen toward the west-southwest during the next 24 hours.  On its anticipated track, Tropical Storm Fengshen will approach the coast of Vietnam near Da Nang in 36 hours.

Tropical Storm Fenshen will bring gusty winds and locally heavy rain to central Vietnam.  Heavy rain could cause floods in some locations.

Typhoon Bualoi Approaches Northern Vietnam

Typhoon Bualoi was approaching the coast of northern Vietnam on Saturday evening.  At 11:00 p.m. EDT on Saturday the center of Typhoon Bualoi was located at latitude 16.7°N and longitude 108.8°E which put the center about 80 miles (130 km) east-northeast of Da Nang Vietnam.  Bualoi was moving toward the west-northwest at 15 m.p.h. (24 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 982 mb.

Typhoon Bualoi was maintaining its intensity as it approached the coast of northern Vietnam on Saturday evening.  Thunderstorms continued to form near the center of Bualoi’s circulation.  Bands of showers and thunderstorms were revolving around the center of Typhoon Bualoi.  Storms near the center of Bualoi generated upper level divergence that pumped mass away to the south and west of the typhoon.   The removal of mass in the upper levels were balanced by the inflow of mass in the lower levels of the atmosphere.  The balance of outflow and inflow caused the surface pressure to remain nearly constant.

The strongest winds were occurring in the northern side of Typhoon Bualoi.  Winds to typhoon force extended out 35 miles (55 km) in the northern side of Bualoi’s circulation.  Winds to tropical storm force extended out 160 miles (260 km) from the center of Typhoon Bualoi.

Typhoon Bualoi will move through an environment somewhat favorable for intensification during the next few hours.  Bualoi will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the southern part of an upper level ridge over China.  The upper level ridge will produce easterly winds that will blow toward the top of Bualoi’s circulation.  Those winds will cause moderate vertical wind shear.  The vertical wind shear will inhibit intensification, but the moderate shear may not be enough to prevent intensification. Typhoon Bualoi could intensify before it reaches the coast of northern Vietnam.

Typhoon Bualoi will move around the southern side of a high pressure system over China.  The high pressure system will steer Bualoi toward the west-northwest during the next 24 hours.  On its anticipated track, the center of Typhoon Bualoi will make landfall on the coast of northern Vietnam in a few hours.  The center of Bualoi Is likely to make landfall between Hue and Vinh.

Typhoon Bualoi will bring strong winds and locally heavy rain to parts of northern Vietnam.  Heavy rain is likely to cause flash floods in some locations.  Bualoi could cause a storm surge of up to 10 feet (3 meters) along portions of the coast.

Elsewhere over the Western North Pacific Ocean, Typhoon Neoguri intensified far to the west of Japan.  At 11:00 p.m. EDT on Saturday the center of Typhoon Neoguri was located at latitude 35.2°N and longitude 163.6°E which put the center about 1065 miles (1720 km) north-northwest of Wake, Island.  Neoguri was moving toward the northeast at 22 m.p.h. (35 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 957 mb.

Bualoi Strengthens to Typhoon over South China Sea

Former Tropical Storm Bualoi strengthened to a typhoon as it moved over the South China Sea on Friday evening.  At 11:00 p.m. EDT on Friday the center of Typhoon Bualoi was located at latitude 15.1°N and longitude 114.2°E which put the center about 400 miles (645 km) east of Da Nang Vietnam.  Bualoi was moving toward the west-northwest at 28 m.p.h. (45 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 982 mb.

Former Tropical Storm Bualoi strengthened to a typhoon on Friday evening.  Even though Bualoi strengthened to a typhoon, the distribution of thunderstorms was asymmetrical.  Thunderstorms were occurring in bands in the eastern and southern parts of Typhoon Bualoi.  Bands in the western and northern parts of Bualoi consisted primarily of showers and lower clouds.  Storms near the center of Bualoi generated upper level divergence that pumped mass away to the south and west of the typhoon.  The removal of mass caused the surface pressure to decrease.

The circulation around Typhoon Bualoi was relatively small.  Winds to typhoon force extended out 35 miles (55 km) from the center of Bualoi’s circulation.  Winds to tropical storm force extended out 105 miles (165 km) from the center of Typhoon Bualoi.

Typhoon Bualoi will move through an environment somewhat favorable for intensification during the next 24 hours.  Bualoi will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the southern part of an upper level ridge over China.  The upper level ridge will produce easterly winds that will blow toward the top of Bualoi’s circulation.  Those winds will cause moderate vertical wind shear.  The vertical wind shear will inhibit intensification, but the moderate shear may not be enough to prevent intensification.  Typhoon Bualoi could intensify during the next 24 hours.

Typhoon Bualoi will move around the southern side of a high pressure system over China.  The high pressure system will steer Bualoi toward the north-northwest during the next 24 hours.  On its anticipated track, Typhoon Bualoi will move toward the coast of northern Vietnam.  Bualoi could reach the coast in 36 hours.

Typhoon Bualoi will bring strong winds and locally heavy rain to parts of northern Vietnam.  Heavy rain is likely to cause flash floods in some location.  Bualoi could cause a storm surge of up to 10 feet (3 meters) along portions of the coast.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Neoguri was still meandering far to the east of Japan.  At 11:00 p.m. EDT on Friday the center of Tropical Storm Neoguri was located at latitude 31.8°N and longitude 156.3°E which put the center about 925 miles (1490 km) east of Tokyo, Japan.  Neoguri was moving toward the east at 11 m.p.h. (17 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 981 mb.

Tropical Storm Man-yi Brings Gusty Winds to Guam

Tropical Storm Man-yi brought gusty winds to Guam on Tuesday.  At 4:00 p.m. EST on Tuesday the center of Tropical Storm Man-yi was located at latitude 12.5°N and longitude 144.4°E which put the center about 40 miles (65 km) southeast of Guam.  Man-yi was moving toward the southwest at 18 m.p.h. (30 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 994 mb.

Tropical Storm Warnings were in effect for Guam, Rota, Tinian, and Saipan.

Tropical Storm Man-yi brought gusty wind to Guam and the Marianas on Tuesday.  A weather station at the Guam International Airport reported a sustained wind speed of 30 m.p.h. (50 km/h) and a wind gust of 48 m.p.h. (77 km/h) on Tuesday.

The circulation around Tropical Storm Man-yi was somewhat disorganized.  There were not many thunderstorms near the center of Man-yi’s circulation.  Thunderstorms were occurring in bands in the southern side of the center of Tropical Storm Man-yi.  Bands in the northern side of Man-yi’s circulation consisted primarily of showers and lower clouds.

The circulation around Tropical Storm Man-yi was small.  Winds to tropical storm force extended out 85 miles (135 km) from the center of Man-yi’s circulation.

Tropical Storm Man-yi will move through an environment somewhat favorable for intensification during the next 24 hours.  Man-yi will move over water where the Sea Surface Temperatures are near 30°C.  It will move under the southern side 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 Man-yi’s circulation.  Those winds will cause some vertical wind shear. The wind shear will inhibit intensification, but the shear may not be enough to prevent intensification. Tropical Storm Man-yi could intensify during the next 24 hours.

Tropical Storm 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 during the next 24 hours.  On its anticipated track, Tropical Storm Man-yi will move away from the Marianas.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Usagi strengthened east of the Philippines, Tropical Depression Yinxing moved inland over Vietnam, and Tropical Storm Toraji was spinning over the South China Sea southeast of Hong Kong.

At 4:00 p.m. EST on Tuesday the center of Tropical Storm Usagi was located at latitude 15.0°N and longitude 128.3°E which put the center about 530 miles (850 km) east of Manila, Philippines.  Usagi was moving toward the west at 17 m.p.h. (28 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 987 mb.

At 10:00 a.m. EST on Tuesday the center of Tropical Depression Yinxing was located at latitude 14.0°N and longitude 108.2°E which put the center about 145 miles (235 km) south of Da Nang, Vietnam.  Yinxing was moving toward the west at 9 m.p.h. (15 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 1004 mb.

At 4:00 p.m. EST on Tuesday the center of Tropical Storm Toraji was located at latitude 20.1°N and longitude 116.8°E which put the center about 245 miles (395 km) southeast of Hong Kong.  Toraji was moving toward the west-northwest at 5 m.p.h. (8 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 Usagi Forms East of the Philippines

Tropical Storm Usagi formed over the Western North Pacific Ocean east of the Philippines on Monday.  At 4:00 p.m. EST on Monday the center of Tropical Storm Usagi was located at latitude 13.0°N and longitude 134.2°E which put the center about 945 miles (1525 km) east of Manila, Philippines.  Usagi was moving toward the west at 17 m.p.h. (28 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 991 mb.

Another tropical storm formed east of the Philippines on Monday.  Former Tropical Depression Twentyseven-W strengthened and the Japan Meteorological Agency designated the system as Tropical Storm Usagi.  More thunderstorms formed near the center of Usagi’s circulation.  However, the distribution of thunderstorms in Tropical Storm Usagi was asymmetrical.  Many of the thunderstorms were occurring in bands in the western half of Usagi’s circulation.  Bands in the eastern half of Tropical Storm Usagi consisted primarily of showers and lower clouds.  Storms near the center of Usagi generated upper level divergence that pumped mass away to the west of the tropical storm.

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

Tropical Storm 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 southern side 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 Usagi’s circulation.  Those winds will cause some vertical wind shear.  The wind shear will inhibit intensification, but the shear will not be enough to prevent intensification.  Tropical Storm Usagi will intensify during the next 24 hours.  Usagi could strengthen to a typhoon on Tuesday.

Tropical Storm 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, Tropical Storm Usagi will move toward the Philippines.

Elsewhere over the Western North Pacific Ocean, former Typhoon Toraji weakened as it moved away from the Philippines, Tropical Storm Yinxing approached the coast of Vietnam, Tropical Storm Watches were issued in the Marianas for Tropical Storm Man-yi.

At 4:00 p.m. EST on Monday the center of Tropical Storm Toraji was located at latitude 18.5°N and longitude 118.7°E which put the center about 420 miles (675 km) southeast of Hong Kong.  Toraji was moving toward the west-northwest at 10 m.p.h. (16 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 985 mb.

At 4:00 p.m. EST on Monday the center of Tropical Storm Yinxing was located at latitude 14.6°N and longitude 109.6°E which put the center about 130 miles (210 km) southeast of Da Nang, Vietnam.  Yinxing was moving toward the south-southwest 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 999 mb.

At 4:00 p.m. EST on Monday the center of Tropical Storm Man-yi was located at latitude 14.0°N and longitude 150.5°E which put the center about 430 miles (695 km) east of Guam.  Man-yi was moving toward the west-southwest at 8 m.p.h. (13 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 992 mb.

Tropical Storm Watches were in effect for Guam, Rota, Tinian and Saipan.

Typhoon Toraji Brings Wind and Rain to Luzon

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

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.

Tropical Storm Trami Makes Landfall in Vietnam

Tropical Storm Trami made landfall on the coast of Vietnam early on Sunday.  At 5:00 a.m. EDT on Sunday the center of Tropical Storm Trami was located at latitude 16.0°N and longitude 107.7°E which put the center about 35 miles (55 km) west-northwest of Da Nang, Vietnam.  Trami was moving toward the southwest at 8 m.p.h. (13 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 Trami made landfall on the coast of Vietnam near Da Nang early on Sunday.  Trami was a relatively small tropical storm at the time of landfall.  Winds to tropical storm force extended out 80 miles (130 km) from the center of Trami’s circulation.

Tropical Storm Trami will move around the southern side of a high pressure system over eastern China.  The high pressure system will steer Trami toward the southwest during the next 24 hours.  On its anticipated track, the center of Tropical Storm Trami will move inland over Southeast Asia.

Tropical Storm Trami will bring gusty winds and locally heavy rain to central Vietnam, southern Laos, northern Cambodia and northeastern Thailand.  Heavy rain is likely to cause floods in some locations.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Kong-rey started to strengthen southeast of Taiwan.  At 5:00 a.m. EDT on Sunday the center of Tropical Storm Kong-rey was located at latitude 16.3°N and longitude 131.6°E which put the center about 680 miles (1095 km) southeast of Taipei, Taiwan.  Kong-rey was moving toward the west at 13 m.p.h. (20 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.