Typhoon Dolphin Hits Okinawa

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Typhoon Dolphin hit Okinawa on Thursday evening.  At 11:00 p.m. EDT on Thursday the center of Typhoon Dolphin was located at latitude 27.2°N and longitude 128.3°E which put the center about 25 miles (40 km) north-northeast of Okinawa.  Dolphin was moving toward the west at 17 m.p.h. (28 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 955 mb.

Typhoon Dolphin started to intensify on Thursday evening as it approached Okinawa.  A small circular eye was visible at the center of Dolphin’s circulation on satellite and radar images.   Bands of showers and thunderstorms were revolving around the core of Dolphin’s circulation.    Storms near the core of Dolphin generated upper level divergence that pumped mass away from the typhoon.  The removal of mass in the upper levels was greater than the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure decreased a little on Thursday.

The eye of Typhoon Dolphin was passing just to the north of Okinawa.  The southern part of the eyewall of Dolphin was passing over northern Okinawa.

A weather station at Naha Airport (ROAH) in Okinawa reported a sustained wind speed of 46 m.p.h. (74 km/h) and a wind gust of 61 m.p.h. (98 km/h).

Typhoon Dolphin was a large typhoon.  Winds to typhoon force extended out 140 miles (220 km) in the northern half of Dolphin’s circulation.  Winds to typhoon force extended out 70 miles (110 km) in the southern half of Typhoon Dolphin.  Winds to tropical storm force extended out 310 miles (500 km) from the center of Dolphin’s circulation.

The Hurricane Intensity Index (HII) for Typhoon Dolphin is 16.5.  The Hurricane Size Index (HSI) is 38.3 and the Hurricane Wind Intensity Size Index (HWISI) is 54.8

Typhoon Dolphin will move through an environment that will be favorable for intensification during the next 24 hours.  Dolphin will move over water where the Sea Surface Temperatures are near 30°C.  It will move under the middle of an upper level ridge that is 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 Dolphin could intensify on Friday as long as Okinawa does not disrupt the inner core of its circulation..

Typhoon Dolphin will move around the southern side of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Dolphin toward the west during the next 24 hours.  On its anticipated track, the center of Typhoon Dolphin will move west of the Ryukyu Islands on Friday.  Dolphin could hit the east coast of China in less than 48 hours.

Typhoon Dolphin will continue to bring strong winds and heavy rain to the Ryukyu Islands on Friday.  The strongest winds and heaviest rain will occur in Okinawa.  Heavy rain will cause flash floods in some locations.  Typhoon Dolphin could also cause a storm surge of up to 10 feet (3 meters) along the coast of some of the islands.

Even the center of Typhoon Dolphin will pass north of Taiwan, bands in the southern part of Dolphin’s circulation will drop heavy rain on northern Taiwan.

Typhoon Dolphin will also bring strong winds and heavy rain to eastern China.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Chan-hom formed southeast of Japan.  At 11:00 p.m. EDT on Thursday the center of Tropical Storm Chan-hom was located at latitude 29.6°N and longitude 160.3°E which put the center about 1300 miles (2095 km) east-southeast of Tokyo, Japan.  Chan-hom was moving toward the northwest 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 987 mb.

Typhoon Dolphin Continues Toward Okinawa

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Typhoon Dolphin continued to move toward Okinawa on Wednesday.  At 11:00 p.m. EDT on Wednesday the center of Typhoon Dolphin was located at latitude 26.3°N and longitude 132.9°E which put the center about 355 miles (570 km) east of Okinawa.  Dolphin was moving toward the west at 15 m.p.h. (24 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 956 mb.

Typhoon Dolphin weakened slowly on Wednesday.  The circulation around Dolphin pulled some drier air close to the core of the typhoon.  The drier air caused thunderstorms in some parts of Typhoon Dolphin to weaken.

There was still a small circular eye at the center of Typhoon Dolphin.  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 still were revolving around the core of Dolphin’s circulation.  There were wider areas of clear air in between the rainbands.  Storms near the core of Dolphin generated less upper level divergence that pumped less mass away from the typhoon. The removal of mass in the upper levels was less than the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure increased on Wednesday.

The circulation around Typhoon Dolpin was still large on Wednesday.  Winds to typhoon force extended out 140 miles (220 km) from the center of Dolphin’s circulation.  Winds to tropical storm force extended out 305 miles (490 km) from the center of Typhoon Dolphin.

The Hurricane Intensity Index (HII) for Typhoon Dolphin is 13.9.  The Hurricane Size Index (HSI) is 44.7 and the Hurricane Wind Intensity Size Index (HWISI) is 58.6. Typhoon Dolphin is similar in intensity to Hurricane Sandy was when Sandy hit the East Coast of the U.S. in 2012.  Typhoon Dolphin is not quite as big as Sandy was.

Typhoon Dolphin will move through an environment that will be favorable for a strong typhoon during the next 24 hours.  Dolphin will move over water where the Sea Surface Temperatures are near 30°C.  It will move under the middle of an upper level ridge that is 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.  However, the drier air being pulled into Dolphin’s circulation will inhibit intensification.  Typhoon Dolphin is likely to maintain its intensity on Thursday.

Typhoon Dolphin will move around the southern side of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Dolphin toward the west during the next 24 hours.  On its anticipated track, the center of Typhoon Dolphin will be near Minami Daito Jima in 12 hours. The center of Typhoon Dolpin will approach Okinawa in 24 hours,

Typhoon Dolphin will bring strong winds and heavy rain to Minami Daito Jima and to the central Ryukyu Islands including Okinawa later this week.  Heavy rains are likely to cause flash floods in some locations.  Typhoon Dolphin could also cause a storm surge of up to 10 feet (3 meters) along the coast of some of the islands.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Kujira dropped heavy rain on parts of Luzon.  Kujira weakened to a tropical depression after the center moved over Luzon.  At 11:00 p.m. EDT on Wednesday the center of Tropical Depression Kujira was located at latitude 17.3°N and longitude 121.6°E which put the center about 25 miles (40 km) northwest of Cauayan, Philippines.  Kujira was moving toward the east-southeast at 7 m.p.h. (11 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 997 mb.

 

Typhoon Dolphin Moves Toward Okinawa

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Typhoon Dolphin moved toward Okinawa on Tuesday.  At 11:00 p.m. EDT on Tuesday the center of Typhoon Dolphin was located at latitude 25.5°N and longitude 137.7°E which put the center about 655 miles (1055 km) east of Okinawa.  Dolphin was moving toward the west at 11 m.p.h. (17 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 943 mb.

The intensity of Typhoon Dolphin fluctuated a little on Tuesday, but Dolphin ended the day as strong as it was when the day started.  A circular eye with a diameter of 25 miles (40 km) was at the center of Dolphin’s circulation.  The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that ring of storms.

Typhoon Dolphin appeared to pull some drier air into its circulation on Tuesday.  Bands of showers and thunderstorms still were revolving around the core of Dolphin’s circulation.  However, there were wider areas of clear air in between the rainbands.  Storms near the core of Dolphin generated strong upper level divergence that pumped mass away from the typhoon.  The removal of mass in the upper levels was nearly equal to the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure did not change much again on Tuesday.

The circulation around Typhoon Dolpin got even larger on Tuesday.  Winds to typhoon force extended out 130 miles (210 km) from the center of Dolphin’s circulation.  Winds to tropical storm force extended out 290 miles (465 km) from the center of Typhoon Dolphin.

The Hurricane Intensity Index (HII) for Typhoon Dolphin is 20.6.  The Hurricane Size Index (HSI) is 40.6 and the Hurricane Wind Intensity Size Index (HWISI) is 61.2.  Typhoon Dolphin is similar in intensity to Hurricane Irma was when Irma hit South Florida in 2017.  Typhoon Dolphin is much larger than Irma was.

Typhoon Dolphin will move through an environment that will be favorable for a powerful typhoon during the next 24 hours.  Dolphin will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge that is 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 Dolphin is likely to maintain its intensity on Wednesday unless another eyewall replacement cycle occurs.

Typhoon Dolphin will move around the southern side of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Dolphin toward the west during the next 24 hours.  On its anticipated track, the center of Typhoon Dolphin will be near Minami Daito Jima in less than 36 hours.  The center of Typhoon Dolpin will be near Okinawa in 48 hours,

Typhoon Dolphin will bring strong winds and heavy rain to Minami Daito Jima and to the central Ryukyu Islands including Okinawa later this week.  Heavy rains are likely to cause flash floods in some locations.  Typhoon Dolphin could also cause a storm surge of up to 10 feet (3 meters) along the coast of some of the islands.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Kujira formed west of Luzon.  At 11:00 p.m. EDT on Tuesday the center of Tropical Storm Kujira was located at latitude 17.6°N and longitude 119.0°E which put the center about 260 miles (420 km) northwest of Manila, Philippines.  Kujira was moving toward the west-northwest at 3 m.p.h. (5 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.

Typhoon Dolphin Brings Wind and Rain to Iwo To

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Typhoon Dolphin brought wind and rain to Iwo To on Monday.  The center of Dolphin’s circulation was still east of Iwo To.  At 11:00 p.m. EDT on Monday the center of Typhoon Dolphin was located at latitude 25.1°N and longitude 142.6°E which put the center about 105 miles (1650 km) east of Iwo To.  Dolphin was moving toward the west at 11 m.p.h. (17 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 947 mb.

Typhoon Dolphin maintained its intensity after it completed another eyewall replacement cycle.  A circular eye with a diameter of 30 miles (50 km) was at the center of Dophin’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 Dolphin.  Storms near the core of Dolphin generated strong upper level divergence that pumped mass away from the typhoon.  The removal of mass in the upper levels was nearly equal to the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure did not change much on Monday.

Multiple eyewall replacement cycles have turned Dolphin into a large typhoon.  Winds to typhoon force extended out 90 miles (145 km) in the northern side of Dolphin’s circulation. Winds to typhoon force only extended out 35 miles (55 km) in the southern side of Typhoon Dolphin.  Winds to tropical storm force extended out 265 miles (425 km) from the center of Dolphin’s circulation.

The Hurricane Intensity Index (HII) for Typhoon Dolphin is 20.6. The Hurricane Size Index (HSI) is 25.1 and the Hurricane Wind Intensity Size Index (HWISI) is 45.7.  Typhoon Dolphin is similar in size and intensity to Hurricane Irma was when Irma hit South Florida in 2017.

Typhoon Dolphin will move through an environment that will be favorable for intensification during the next 24 hours.  Dolphin will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge that is 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 Dolphin could intensify on Tuesday unless another  eyewall replacement cycle occurs.

Typhoon Dolphin will move around the southern side of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Dolphin toward the west during the next 24 hours.  On its anticipated track, the center of Typhoon Dolphin will cross Iwo To during the next few hours.  The center of Dolphin’s circulation will approach Minami Daito Jima in 48 hours.  The center of Typhoon Dolpin will be near Okinawa in 3 days,

Typhoon Dolphin will continue to bring strong winds and heavy rain to Iwo To on Tuesday.  Heavy rain is likely to cause flash floods.  Typhoon Dolphin will be capable of causing major damage.

Typhoon Dolphin will bring strong winds and heavy rain to Minami Daito Jima and to the central Ryukyu Islands including Okinawa later this week.

Typhoon Dolphin Approaches Iwo To

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Typhoon Dolphin was approaching Iwo To on Sunday night.  At 11:00 p.m. EDT on Sunday the center of Typhoon Dolphin was located at latitude 24.5°N and longitude 147.8°E which put the center about 445 miles (720 km) east of Iwo To.  Dolphin was moving toward the west-northwest at 12 m.p.h. (19 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 949 mb.

Typhoon Dolphin appeared to be in the middle of another eyewall replacement cycle on Sunday evening.  A small circular eye was at the center of Dolphin’s circulation.  The eye was surrounded a ring of thunderstorms and the strongest winds occurred in that ring of storms.  A second larger ring of thunderstorms with a diameter of 35 miles (55 km) surrounded the inner eye and eyewall.  Bands of showers and thunderstorms revolved around the core of Typhoon Dolphin.  Storms near the core of Dolphin generated strong upper level divergence that pumped mass away from the typhoon.  The removal of mass in the upper levels was less than the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure started to increase again on Sunday.

Multiple eyewall replacement cycles were having an effect on the structure of Typhoon Dolphin.   Winds to typhoon force extended out 90 miles (145 km) in the northern side of Dolphin’s circulation.  Winds to typhoon force only extended out 35 miles in the southern side of Typhoon Dolphin.  Winds to tropical storm force extended out 265 miles (425 km) from the center of Dolphin’s circulation.

The Hurricane Intensity Index (HII) for Typhoon Dolphin is 20.6.  The Hurricane Size Index (HSI) is 25.5 and the Hurricane Wind Intensity Size Index (HWISI) is 46.1.  Typhoon Dolphin is similar in size and intensity to Hurricane Irma was when Irma hit South Florida in 2017.

Typhoon Dolphin will move through an environment that will be favorable for a powerful typhoon during the next 24 hours.  Dolphin will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge that is 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 Dolphin is likely to weaken a little on Monday. as it completes the current eyewall replacement cycle.

Typhoon Dolphin will move around the southern side of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Dolphin toward the west-northwest during the next 24 hours.  On its anticipated track, the center of Typhoon Dolphin will reach Iwo To in 24 hours.  The center of Dolphin’s circulation will approach Minami Daito Jima in three days.  The center of Typhoon Dolpin will be near Okinawa To in 4 days,

Typhoon Dolphin will bring strong winds and heavy rain to Iwo To.  Heavy rain is likely to cause flash floods.  Typhoon Dolphin will be capable of causing major damage.

Genevieve Still a Tropical Storm

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Tropical Storm Genevieve was still a tropical storm on Saturday evening as it approached the Central Pacific Ocean.  At 11:00 p.m. EDT on Saturday the center of Tropical Storm Genevieve was located at latitude 23.5°N and longitude 136.0°W which put the center about 1655 miles (2665 km) west of southern tip of Baja California.  Genevieve was moving toward the west-northwest at 14 m.p.h. (22 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 1004 mb.

Tropical Storm Genevieve continued to weaken gradually on Saturday as it moved over cooler water.  Thunderstorms were still occurring in bands in the northern side of Genevieve’s circulation.  Bands in the southern side of Tropical Storm Genevieve consisted primarily of showers and lower clouds.  Storms near the center of Genevieve still generated some upper level divergence that pumped mass away to the north of the tropical storm.  The removal of mass in the upper levels was less than the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure increased gradually on Saturday.

The asymmetrical distribution of thunderstorms in Tropical Storm Genevieve caused the distribution of wind speeds also to be asymmetrical.  Winds to tropical storm force extended out 140 miles (220 km) in the northern half of Genevieve’s circulation.  Winds to tropical storm force only extended out 45 miles in the southern half of Tropical Storm Genevieve.

Tropical Storm Genevieve will move through an environment that will be unfavorable for intensification during the next 24 hours.  Genevieve will move over water where the Sea Surface Temperatures are near 23.5°C.  It will move under the eastern side of an upper level trough that is east of Hawaii.  The upper level trough will produce southwesterly winds that will blow toward the top of Genevieve’s circulation.  Those winds will cause the vertical wind shear to increase on Sunday.  Tropical Storm Genevieve will continue to weaken on Sunday because of the cooler water and more vertical wind shear.

Tropical Storm Genevieve will move around the southern part of a high pressure system that is over the Eastern North Pacific Ocean.  The high pressure system will steer Genevieve toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Genevieve will move over the Central North Pacific Ocean on Sunday.  Genevieve should stay well to the northeast of Hawaii.

Typhoon Dolphin Still Moving Toward Iwo To

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Typhoon Dolphin was still moving toward Iwo on Saturday evening.  At 11:00 p.m. EDT on Saturday the center of Typhoon Dolphin was located at latitude 22.9°N and longitude 152.8°E which put the center about 785 miles (1265 km) east of Iwo To.  Dolphin was moving toward the west-northwest at 16 m.p.h. (26 km/h).  The maximum sustained wind speed was 145 m.p.h. (235 km/h) and there were wind gusts to 175 m.p.h. (280 km/h).  The minimum surface pressure was 931 mb.

Typhoon Dolphin’s intensity fluctuated a little on Saturday, but Dolphin essentially maintained it strength.  A circular eye with a diameter of 35 miles (55 km) was at the center of Dolphin’s circulation.  The eye was surrounded a ring of thunderstorms and the strongest winds occurred in that ring of storms.  Bands of showers and thunderstorms revolved around the core of Typhoon Dolphin.  Storms near the core of Dolphin generated strong upper level divergence that pumped large amounts of mass from the typhoon.  The removal of large amounts of mass in the upper levels was nearly the same as the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure remained almost constant on Saturday.

The completion of multiple eyewall replacement cycles caused the circulation around Typhoon Dolphin to become very large.  Winds to typhoon force extended out 90 miles (145 km) from the center of Dolphin’s circulation.   Winds to tropical storm force extended out 275 miles (445 km) from the center of Typhoon Dolphin.

The Hurricane Intensity Index (HII) for Typhoon Dolphin is 29.9. The Hurricane Size Index (HSI) is 26.7 and the Hurricane Wind Intensity Size Index (HWISI) is 56.6.  Typhoon Dolphin is bigger and stronger than Hurricane Helene was when Helene hit Florida in 2022.

Typhoon Dolphin will move through an environment favorable for a powerful typhoon during the next 24 hours.  Dolphin will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge that is 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 Dolphin is likely to maintain its intensity on Sunday.  Eyewall replacement cycles are likely to continue to cause fluctuation in the intensity of Typhoon Dolphin during the next several days.

Typhoon Dolphin will move around the southern side of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Dolphin toward the west-northwest during the next 24 hours.  On its anticipated track, the center of Typhoon Dolphin will continue to move toward Iwo To.  The center of Dolphin will be near Iwo To in 48 hours,

Tropical Storm Genevieve Churns West of Baja California

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Tropical Storm Genevieve continued to churn over the Eastern North Pacific Ocean west of Baja California on Friday.  At 11:00 p.m. EDT on Friday the center of Tropical Storm Genevieve was located at latitude 22.6°N and longitude 131.4°W which put the center about 1370 miles (2200 km) west of southern tip of Baja California.  Genevieve was moving toward the west-northwest at 15 m.p.h. (24 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.

Tropical Storm Genevieve continued to weaken gradually on Friday as it moved over cooler water in the Eastern North Pacific Ocean west of Baja California.  Thunderstorms near the center of Genevieve’s circulation were not rising as high into the atmosphere.  Bands of showers and thunderstorms were still revolving around the center of Tropical Storm Genevieve.  Storms near the center of Genevieve generated less upper level divergence that pumped less mass away from the tropical Storm.  The removal of mass in the upper levels was less than the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure increased gradually on Friday.

Winds to tropical storm force extended out 105 miles (165 km) from the center of Tropical Storm Genevieve.

Tropical Storm Genevieve will move through an environment that will be unfavorable for intensification during the next 24 hours.  Genevieve will move over water where the Sea Surface Temperatures are near 24.5°C.  It will move through a region where the upper level winds are weak and there will be little vertical wind shear.  Tropical Storm Genevieve will continue to weaken gradually on Saturday as it moves over cooler water.

Tropical Storm Genevieve will move around the southern part of a high pressure system that is over the Eastern North Pacific Ocean.  The high pressure system will steer Genevieve toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Genevieve will continue to move farther away from Baja California.

Typhoon Dolphin Moves Toward Iwo To

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Typhoon Dolphin moved toward Iwo To on Friday.  At 11:00 p.m. EDT on Friday the center of Typhoon Dolphin was located at latitude 20.5°N and longitude 157.8°E which put the center about 1080 miles (1740 km) east-southeast of Iwo To.  Dolphin was moving toward the west-northwest at 11 m.p.h. (17 km/h).  The maximum sustained wind speed was 145 m.p.h. (235 km/h) and there were wind gusts to 175 m.p.h. (280 km/h).  The minimum surface pressure was 933 mb.

Typhoon Dolphin appeared to be in the middle of another eyewall replacement cycle on Friday evening.  A circular eye with a diameter of 20 miles (32 km) was at the center of Dolphin’s circulation.  The eye was surrounded by two circular eyewalls.  Bands of showers and thunderstorms revolved around the core of Typhoon Dolphin.  Storms near the core of Dolphin generated strong upper level divergence that pumped large amounts of mass from the typhoon.  The removal of large amounts of mass in the upper levels was slightly less than the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure increased gradually on Friday.

The size of the circulation around Typhoon Dolphin increased on Friday.  Winds to typhoon force extended out 60 miles (95 km) from the center of Dolphin’s circulation.  Winds to tropical storm force extended out 230 miles (370 km) from the center of Typhoon Dolphin.

The Hurricane Intensity Index (HII) for Typhoon Dolphin is 29.9.  The Hurricane Size Index (HSI) is 23.3 and the Hurricane Wind Intensity Size Index (HWISI) is 53.2.  Typhoon Dolphin is similar in size and intensity to Hurricane Helene when Helene hit Florida in 2022.

Typhoon Dolphin will move through an environment favorable for a powerful typhoon during the next 24 hours.  Dolphin will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge that is 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 Dolphin is likely to maintain its intensity on Saturday.  Eyewall replacement cycles are likely to continue to cause fluctuation in the intensity of Typhoon Dolphin during the next few days.

Typhoon Dolphin will move around the southern side of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Dolphin toward the west-northwest during the next 24 hours.  On its anticipated track, the center of Typhoon Dolphin will continue to move toward Iwo To.  The center of Dolphin could be near Iwo To in 72 hours,

Typhoon Dolphin Moves West of Wake Island

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Typhoon Dolphin moved west of Wake Island on Thursday.  At 11:00 p.m. EDT on Thursday the center of Typhoon Dolphin was located at latitude 18.6°N and longitude 161.5°E which put the center about 315 miles (510 km) west-southwest of Wake Island.  Dolphin was moving toward the west-northwest at 12 m.p.h. (19 km/h).  The maximum sustained wind speed was 155 m.p.h. (250 km/h) and there were wind gusts to 190 m.p.h. (305 km/h).  The minimum surface pressure was 924 mb.

Typhoon Dolphin appeared to go through another eyewall replacement cycle.  A circular eye with a diameter of 30 miles (50 km) was present at the center of Dolphin’s circulation on Thursday evening.  The eye was surrounded by a ring of thunderstorms.  The strongest winds were occurring in that ring of storms.  Bands of showers and thunderstorms revolved around the core of Typhoon Dolphin.  Storms near the core of Dolphin generated strong upper level divergence that pumped large amounts of mass from the typhoon.  The removal of large amounts of mass in the upper levels was nearly equal to the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure  did not change much on Thursday.

The completion of another eyewall replacement cycle increased the size of the circulation around Typhoon Dolphin.  Winds to typhoon force extended out 60 miles (95 km) from the center of Dolphin’s circulation.  Winds to tropical storm force extended out 175 miles (280 km) from the center of Typhoon Dolphin.

The Hurricane Intensity Index (HII) for Typhoon Dolphin is 33.3.  The Hurricane Size Index (HSI) is 21.0 and the Hurricane Wind Intensity Size Index (HWISI) is 54.3.  Typhoon Dolphin is similar in intensity to Hurricane Ian when Ian hit Southwest Florida in 2022.  Typhoon Dolphin is larger than Ian was.

Typhoon Dolphin will move through an environment favorable for a powerful typhoon during the next 24 hours.  Dolphin will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the middle of an upper level ridge that is 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 Dolphin is likely to maintain its intensity on Friday.  Eyewall replacement cycles are likely to cause fluctuation in the intensity of Typhoon Dolphin during the next few days.

Typhoon Dolphin will move around the southern side of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Dolphin toward the west-northwest during the next 24 hours.  On its anticipated track, the center of Typhoon Dolphin will move toward Iwo To.