Tag Archives: WP29

Tropical Storm Nakri Moves Away from Japan

Tropical Storm Nakri moved away from Japan on Monday.  At 5:00 p.m. EDT on Monday the center of Tropical Storm Nakri was located at latitude 34.3°N and longitude 149.1°E which put the center about 460 miles (740 km) east of Tokyo, Japan.  Nakri was moving toward the east at 23 m.p.h. (37 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 985 mb.

Former Typhoon Nakri weakened back to a tropical storm on Monday as it quickly moved farther away from Japan.  Nakri was still a very well organized tropical storm.  The inner end of a rainband wrapped most of the way around the center of Nakri’s circulation.  Bands of showers and thunderstorms revolved around the center of Tropical Storm Nakri.  Storms near the center of Nakri generated upper level divergence that pumped mass away to the east of the tropical storm.

The distribution of winds speeds around Tropical Storm Nakri was fairly symmetrical.  Winds to tropical storm force extended out 155 miles (250 km) from the center of Nakri’s circulation.

Tropical Storm Nakri will move through an environment that will be unfavorable for intensification of a tropical cyclone during the next 24 hours.  Nakri will move over water where the Sea Surface Temperatures are near 25°C.  It will move under the southeastern part of an upper level trough that is over northern Japan.  The upper level trough will produce westerly winds that will blow toward the top of Nakri’s circulation.  Those winds will cause strong vertical wind shear.  Cooler Sea Surface Temperatures and strong vertical wind shear will cause Tropical Storm Nakri to weaken during the next 24 hours.  The cooler Sea Surface Temperatures and strong vertical wind shear will also cause Nakri to make a transition to an extratropical cyclone.

The upper level trough over northern Japan will steer Tropical Storm Nakri quickly toward the east during the next 24 hours.  On its anticipated track, Tropical Storm Nakri will continue to move quickly away from Japan.

Nakri Strengthens to a Typhoon

Former Tropical Storm Nakri strengthened to a typhoon south of Japan on Sunday.  At 11:00 a.m. EDT on Sunday the center of Tropical Storm Nakri was located at latitude 32.0°N and longitude 137.4°E which put the center about 285 miles (460 km) southwest of Tokyo, Japan.  Nakri was moving toward the east-northeast at 16 m.p.h. (26 km/h).  The maximum sustained wind speed was 75 m.p.h. (120 km/h) and there were wind gusts to 90 m.p.h. (145 km/h).  The minimum surface pressure was 982 mb.

Former Tropical Storm Nakri strengthened to a typhoon south of Japan on Sunday.  A small circular eye was present at the center of Typhoon Nakri.  The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that ring of storms.  Thunderstorms were also occurring in bands in the northern and eastern parts of Nakri’s circulation.  Bands in the southern and western sides of Typhoon Nakri consisted primarily of showers and lower clouds.  Storms near the center of Nakri generated upper level divergence that pumped mass away to the east of the typhoon.

Winds to typhoon force extended out 15 miles (25 km) from the center of Typhoon Nakri.  Winds to tropical storm force extended out 110 miles (175 km) in the eastern half of Nakri’s circulation.  Winds to tropical storm force only extended out 45 miles (75 km) in the western side of Typhoon Nakri.

Typhoon Nakri will move through an environment favorable for intensification during the next 24 hours.  Nakri will move over water where the Sea Surface Temperatures are near 28°C.  It will move under the eastern side of an upper level trough that is west of Japan.  The upper level trough will produce westerly winds that will blow toward the top of Nakri’s circulation.  However, the winds in the lower atmosphere will also blow from the west.  So, there will not be a lot of vertical wind shear. Typhoon Nakri is likely to intensify during the next 24 hours.

The upper level trough that is west of Japan will steer Typhoon Nakri toward the east-northeast during the next 24 hours.  On its anticipated track, Typhoon Nakri will pass south of Tokyo in 12 hours.

Tropical Storm Nakri Moves South of Japan

Tropical Storm Nakri moved south of Japan on Saturday.  At 11:00 a.m. EDT on Saturday the center of Tropical Storm Nakri was located at latitude 29.1°N and longitude 132.0°E which put the center about 320 miles (515 km) south-southwest of Kochi, Japan.  Nakri was moving toward the north-northeast at 13 m.p.h. (21 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 Nakri started to strengthen on Saturday as it moved south of Japan.  The inner end of a rainband wrapped around the center of Nakri’s circulation.  An eye appeared to be forming at the center of Tropical Storm Nakri.  Bands of showers and thunderstorms were revolving around the center of Nakri’s circulation.  Storms near the center of Nakri generated upper level divergence that pumped mass away to the east of the tropical storm.  The removal of mass caused the surface pressure to decrease.

The size of the circulation around Tropical Storm Nakri was relatively small.  Winds to tropical storm force extended out 105 miles (165 km) from the center of Nakri’s circulation.

Tropical Storm Nakri will move through an environment favorable for intensification during the next 24 hours.  Nakri will move over water where the Sea Surface Temperatures are near 28°C.  It will move under the eastern side of an upper level trough that is west of Japan.  The upper level trough will produce southwesterly winds that will blow toward the top of Nakri’s circulation.  However, the winds in the lower atmosphere will also blow from the west.  So, there will not be a lot of vertical wind shear.  Tropical Storm Nakri will intensify during the next 24 hours.  Nakri could strengthen to a typhoon on Sunday.

The upper level trough that is west of Japan will steer Tropical Storm Nakri toward the northeast during the next 24 hours.  On its anticipated track, Tropical Storm Nakri will move south of Honshu on Sunday.

Typhoon Halong Passes South of Tokyo

Typhoon Halong passed south of Tokyo on Wednesday.  At 5:00 p.m. EDT on Wednesday the center of Typhoon Halong was located at latitude 32.8°N and longitude 140.3°E which put the center about 195 miles (315 km) south of Tokyo, Japan.  Halong was moving toward the northeast 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 946 mb.

Typhoon Halong was starting to weaken as it passed south of Tokyo on Wednesday.  A circular eye with a diameter of 25 miles (40 km) was still present at the center of Halong’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 Typhoon Halong.  Storms near the center of Halong generated upper level divergence that pumped mass away to the east of the typhoon.  The removal of mass was less than the inflow of mass in the lower levels of the atmosphere.  So, the surface pressure was increasing.

The circulation around Typhoon Halong increased in size on Wednesday.  Winds to typhoon force extended out 40 miles (65 km) from the center of Halong’s circulation.  Winds to tropical storm force extended out 140 miles (225 km) from the center of Typhoon Halong.

The Hurricane Intensity Index (HII) for Typhoon Halong was 23.6.  The Hurricane Size Index (HSI) was 13.9 and the Hurricane Wind Intensity Size Index (HWISI) was 37.5.  Typhoon Halong was similar in intensity to Hurricane Dennis when Dennis hit Northwest Florida in 2005.  Halong is bigger than Dennis was.

Typhoon Halong will move through an environment that will become more unfavorable for intensification during the next 24 hours.  Halong will move over water where the Sea Surface Temperatures are near 26°C.  It will move under the southern extent of the upper level westerly winds in the middle latitudes.  The upper level westerly winds will blow toward the top of Halong’s circulation.  Those winds will cause the vertical wind shear to increase.  Cooler Sea Surface Temperatures and more vertical wind shear will cause Typhoon Halong to weaken during the next 24 hours.  Halong is likely to make a transition to an extratropical cyclone during the next few days.

The upper level westerly winds will steer Typhoon Halong quickly toward the east during the next 24 hours.  On its anticipated track, Typhoon Halong will move away from Japan on Thursday.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Nakri former southwest of Iwo To.  At 5:00 p.m. EDT on Wednesday the center of Tropical Storm Nakri was located at latitude 22.3°N and longitude 136.0°E which put the center about 625 miles (1010 km) south-southeast of Okinawa.  Nakri was moving toward the northwest at 18 m.p.h. (30 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 1000 mb.

Pakhar Weakens to a Tropical Depression

Former Tropical Storm Pakhar weakened to a tropical depression over the Western North Pacific Ocean northeast of the Philippines on Monday. At 4:00 p.m. EST on Monday the center of Tropical Depression Pakhar was located at latitude 19.3°N and longitude 131.1°E which put it about 745 miles (1205 km) east-northeast of Manila, Philippines. Pakhar was moving toward the southeast at 7 m.p.h. (21 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 1003 mb.

After strengthening on Sunday, former Tropical Storm Pakhar weakened to a tropical depression on Monday. An upper level trough west of Japan produced strong southwesterly winds that blew across the top of Pakhar’s circulation. Those winds caused strong vertical wind shear and they blew the top of former Tropical Storm Pakhar away to the northeast of the lower level circulation. The circulation around Tropical Depression Pakhar on Monday afternoon consisted of a swirl of showers and lower clouds. Any clouds that grew higher into the atmosphere were quickly sheared apart by the strong upper level winds.

The circulation around Tropical Depression Pakhar will spin down gradually during the next 24 hours. Pakhar will move over water where the Sea Surface Temperatures are near 28˚C. However, the upper level trough west of Japan will continue to cause strong vertical wind shear. The wind shear will prevent the development of new thunderstorms around Tropical Depression Pakhar.

Since the circulation around Tropical Depression Pakhar only exists in the lower levels of the atmosphere, it will be steered by the winds near the surface. Northeasterly winds will push Pakhar back toward the southwest. On its anticipated track, the circulation around Tropical Depression Pakhar should dissipate east of the Philippines during the next 48 hours.

Tropical Storm Pakhar Develops Northeast of the Philippines

Tropical Storm Pakhar developed over the Western North Pacific Ocean northeast of the Philippines on Sunday. At 10:00 a.m. EST on Sunday the center of Tropical Storm Pakhar was located at latitude 18.5°N and longitude 127.5°E which put it about 470 miles (755 km) east-northeast of Manila, Philippines. Pakhar was moving toward the northeast 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 997 mb.

The circulation around a low pressure system northeast of the Philippines strengthened on Sunday and the Japan Meteorological Agency designated the system as Tropical Storm Pakhar. More thunderstorms developed near the center of Pakhar’s circulation. Bands of showers and thunderstorms were revolving around the center of Tropical Storm Pakhar. Storms near the center of Pakhar generated upper level divergence that pumped mass away to the northeast of the tropical storm. Winds to tropical storm force extended out 100 miles (160 km) from the center of circulation.

Tropical Storm Pakhar will move through an environment favorable for intensification during the next 18 hours. Pakhar will move over water where the Sea Surface Temperatures are near 28˚C. An upper level trough east of China will produce southwesterly winds that will blow toward the top of Pakhar’s circulation. Those winds will cause moderate vertical wind shear. The wind shear will inhibit intensification, but Tropical Storm Pakhar could strengthen during the next 18 hours. The upper level trough will move closer to Pakhar on Monday and the upper level winds will get stronger. More vertical wind shear will cause Tropical Storm Pakhar to weaken early next week.

The upper level trough over eastern China will steer Tropical Storm Pakhar toward the northeast during the next 24 hours. On its anticipated track, Pakhar will move farther away from the Philippines. When the vertical wind shear increases on Monday, strong upper level winds could blow the top off of Tropical Storm Pakhar. If that happens, then Pakhar will be steered by winds in the lower levels of the atmosphere. Those winds could steer Pakhar back toward the southwest early next week.

Typhoon Kammuri Brings Wind and Rain to Southern Luzon

Typhoon Kammuri brought wind and rain to southern Luzon and Mindoro on Tuesday.  At 10:00 a.m. EST on Tuesday the center of Typhoon Kammuri was located at latitude 13.4°N and longitude 114.9°E which put it about 115 miles (185 km) south-southwest of Manila, Philippines.  Kammuri was moving toward the west 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 976 mb.

Typhoon Kammuri made landfall on the coast of southeastern Luzon near Sorsogon and Legaspi on Nonday.  After making landfall, the eye of Kammuri passed over San Pascual on the northern end of Burias Island.  The center of Kammuri moved across the Sibuyan Sea and the core of the typhoon passed over Marinduque Island and northern Mindoro.  Rainbands in the northern half of Typhoon Kammuri produced strong winds and dropped heavy rain over southern Luzon.  There were reports of widespread power outages.  There were also reports of several deaths associated with the passage of Kammuri.

Typhoon Kammuri weakened slowly as the circulation passed over land.  Increased friction caused the wind speed to gradually decrease and mountains disrupted portions of the circulation.  The eastern side of the eyewall weakened and the eye was no longer apparent on infrared satellite images.  The strongest thunderstorms were occurring in bands west and north of the center of circulation.  Bands southeast of the center consisted primarily of showers and lower clouds.  Winds to typhoon force extended out 60 miles (95 km) from the center of circulation.  Winds to tropical storm force extended out 250 miles (400 km) from the center.

Conditions will improve over southern Luzon and Mindoro as Typhoon Kammuri moves farther away.  Kammuri could maintain its intensity over even strengthen slightly during the next 24 hours as it moves over the warm water in the South China Sea.  Typhoon Kammuri will move over water where the Sea Surface Temperature is near 29°C.  Kammuri will reach the eastern end of a surface high pressure system over eastern Asia in about 24 hours.  Strong northeasterly winds will blow around the eastern end of the high and those winds will create strong vertical wind shear as they blow under southwesterly winds in the upper levels.  The strong wind shear is likely to cause Typhoon Kammuri to weaken quickly in about a day or so.

A ridge over the Western North Pacific Ocean will steer Typhoon Kammuri toward the west for about another 24 hours.  On its anticipated track Kammuri will move farther away from the Philippines.  When Typhoon Kammuri reaches the area of more vertical wind shear and the typhoon weakens, it will be steered by winds closer to the surface.  The strong northeasterly winds in that part of the atmosphere will steer Kammuri toward the south-southwest later this week.

Major Typhoon Kammuri Makes Landfall on Southeastern Luzon

Major Typhoon Kammuri made landfall on southeastern Luzon near Sorsogon and Legaspi on Monday.  At noon EST on Monday the center of Typhoon Kammuri was located at latitude 13.2°N and longitude 123.6°E which put it about 10 miles (15 km) west of Legaspi, Philippines and about 230 miles (370 km) east-southeast of Manila.  Kamuri was moving toward the west at 11 m.p.h. (17 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 950 mb.

Typhoon Kammuri rapidly intensified into the equivalent of a major hurricane during the 12 hours prior to landfall on Monday.  A large eye with a diameter to 50 miles (80 km) developed at the center of Kammuri.  A thick ring of strong thunderstorms surrounded the eye and the strongest winds were occurring in that ring of storms.  Bands of showers and thunderstorms were revolving around the core of the typhoon.  Storms near the core generated strong upper level divergence which pumped mass away from the typhoon in all directions.  The removal of large amounts of mass allowed the surface pressure to decrease more quickly.

Typhoon Kammuri also grew larger as it got stronger.  Winds to typhoon force extended out about 50 miles (80 km) in most portions of Kammuri, but those strong winds extended out 90 miles (145 km) in the northwestern part of the circulation.  Winds to tropical storm force extended out 175 miles (280 km) in most parts of the circulation, but they extended out 300 miles (480 km) to the northwest of the center of Kammuri.  The Hurricane Intensity Index (HII) for Typhoon Kammuri was 25.1.  The Hurricane Size Index (HSI) was 25.4 and the Hurricane Wind Intensity Size Index (HWISI) was 50.5.  Typhoon Kammuri was capable of causing widespread major damage to southern Luzon.

Typhoon Kammuri will move south of a ridge of high pressure over the Western North Pacific Ocean.  The ridge will steer Kammuri toward the west-northwest during the next 36 to 48 hours.  On its anticipated track Typhoon Kammuri will move across southeastern Luzon and over the Sibuyan Sea during the next few hours.  The center of Kammuri is forecast to pass south of Manila in 18 to 24 hours.

Typhoon Kammuri will weaken slowly as it moves across southeastern Luzon.  Kammuri will bring strong winds and heavy rain to southern Luzon.  Typhoon Kammuri will also have a big impact on Burias, Marinduque Island and Mindoro.  Kammuri could produce winds to near typhoon force around Manila.  Typhoon Kammuri is likely to cause major damage around Legaspi.  Locally heavy rain could produce flash floods in numerous locations.  Kammuri could cause serious damage around Manila.

Typhoon Kammuri Strengthens As It Nears Southeast Luzon

Typhoon Kammuri strengthened as it neared southeast Luzon on Sunday night.  At 10:00 p.m. EST on Sunday the center of Typhoon Kammuri was located at latitude 13.0°N and longitude 126.0°E which put it about 385 miles (625 km) east- southeast of Manila, Philippines and about 160 miles (260 km) east of Legaspi.  Kammuri was moving toward the west at 15 m.p.h. (24 km/h).  The maximum sustained wind speed was 105 m.p.h. (165 km/h) and there were wind gusts to 125 m.p.h. (200 km/h).  The minimum surface pressure was 959 mb.

Typhoon Kammuri strengthened on Sunday.  An ellipitical eye with a mean radius of 30 miles (50 km) cleared out at the center of circulation.  A ring of strong thunderstorms surrounded the eye and the strongest winds were occurring in that ring of storms.  Bands of showers and thunderstorms were revolving around the core of Kammuri.  Storms near the core were generating upper level divergence which was pumping mass away from the typhoon.  The removal of mass allowed the surface pressure to decrease.

The wind field around Typhoon Kammuri became more symmetrical on Sunday.  Winds to typhoon force extended out 50 miles (80 km) from the center of circulation.  Winds to tropical storm force extended out 180 miles (290 km) from the center.  The Hurricane Intensity Index (HII) was 17.8.  The Hurricane Size Index (HSI) was 19.3 and the Hurricane Wind Intensity Size Index (HWISI) was 37.1.  Typhoon Kammuri was capable of causing serious damage.

Typhoon Kammuri will move through an environment favorable for intensification during the next 12 hours.  Kammuri will move over water where the Sea Surface Temperature is near 29°C.  It will move through a region where the upper level winds are weak and there will be little vertical wind shear.  Typhoon Kammuri could strengthen into the equivalent of a major hurricane before it reaches southeastern Luzon.  Kammuri will start to weaken after the center moves over land.

Typhoon Kammuri will move south of a high pressure system over the Western North Pacific Ocean.  The high will steer Kammuri toward the west during the next several days.  On its anticipated track the center of Typhoon Kammuri will pass between Samar and Catanduanes Island before making landfall near Sorsogon on southeast Luzon.  The center of Kammuri will pass near Legaspi, Tabaco and Ligao.

Typhoon Kammuri will be capable of causing major damage in the Philippines.  Kammuri will bring strong winds to southeast Luzon.  Typhoon Kammuri could also produce winds to near typhoon force in Virac on Catanduanes Island.  Kammuri could produce a storm surge of up to 10 feet (3 meters) in locations where the wind blows water toward the coast.  Typhoon Kammuri will drop locally heavy rain over southern Luzon.  Flash floods could occur, especially in areas of steeper slopes.

Typhoon Kammuri Moves Closer to the Philippines

Typhoon Kammuri moved closer to the Philippines on Saturday.  At 10:00 p.m. EST on Saturday the center of Typhoon Kammuri was located at latitude 13.2°N and longitude 130.5°E which put it about 685 miles (1100 km) east of Manila, Philippines.  Kammuri was moving toward the west at 19 m.p.h. (29 km/h).  The maximum sustained wind speed was 90 m.p.h. (145 km/h) and there were wind gusts to 110 m.p.h. (175 km/h).  The minimum surface pressure was 970 mb.

Typhoon Kammuri appeared to be getting better organized on Saturday night.  Visible satellite images of Kammuri  suggested that an eye was clearing out at the center of the typhoon.  The inner end of a rainband wrapped around much of the developing eye.  There was still a gap on the northwestern side of the eyewall, but the gap was getting smaller.  Bands of showers and thunderstorms were revolving around the more organized core of Typhoon Kammuri.  Storms near the core were generating upper level divergence which was pumping mass away from the typhoon.

Winds to typhoon force extended out 50 miles from the center of circulation in the northern half of Typhoon Kammuri and out 25 miles in the southern side of the typhoon.  Winds to tropical storm force extended out 220 miles (355 km) from the center.  The Hurricane Intensity Index (HII) for Typhoon Kammuri was 13.9.  The Hurricane Size Index (HSI) was 17.0 and the Hurricane Wind Intensity Size Index (HWISI) was 30.9.

Typhoon Kammuri will move through an environment favorable for intensification during the next 36 hours.  Kammuri will move over water where the Sea Surface Temperature is near 29°C.  It will move through a region where the upper level winds are weak and there will be little vertical wind shear.  Typhoon Kammuri will intensify and it could strengthen into the equivalent of a major hurricane.  Intensification could be more rapid once an eye and eyewall are full formed.

Typhoon Kammuri will move south of a high pressure system that extends from eastern Asia to the Western North Pacific Ocean.  The high will steer Kammuri toward the west during the next three days.  On its anticipated track Typhoon Kammuri could approach Catanduanes Islands and southeastern Luzon in about 36 hours.  Kammuri could be the equivalent of a major hurricane at that time.