Tag Archives: WP01

Tropical Storm Ewiniar Strengthens Near Manila

Tropical Storm Ewiniar strengthened near Manila on Saturday night. At 11:00 p.m. EDT on Saturday the center of Tropical Storm Ewiniar was located at latitude 14.3°N and longitude 121.4°E which put it about 50 miles (80 km) southeast of Manila, Philippines. Ewiniar was moving toward the northwest at 6 m.p.h. (10 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 990 mb.

Former Tropical Depression 01W strengthened over southern Luzon on Saturday night and the Japan Meteorological Agency designated the system as Tropical Storm Ewiniar. The circulation around Tropical Storm Ewiniar was very symmetrical. Thunderstorms were occurring near the center of Ewiniar’s circulation. Bands of showers and thunderstorms were revolving around the center of circulation. Storms near the center of Ewiniar generated upper level divergence that pumped mass away from the tropical storm. The removal of mass caused the surface pressure to decrease.

The circulation around Tropical Storm Ewiniar was relatively small. Winds to tropical storm force extended out 60 miles (95 km) from the center of Ewiniar’s circulation.

Tropical Storm Ewiniar will move through an environment that will be mostly favorable for intensification during the next 24 hours. Ewiniar will move over water where the Sea Surface Temperatures are near 31°C. It will move under the western part of an upper level ridge over the Western North Pacific Ocean. The upper level ridge will produce southerly winds that will blow toward the top of Ewiniar’s circulation. Those winds will cause some vertical wind shear, but the shear will not be strong enough to prevent intensification. Even though part of the circulation around Tropical Storm Ewiniar will pass over Luzon, Ewiniar is likely to intensify during the next 24 hours.

Tropical Storm Ewiniar will move around the western end of a high pressure system that is east of the Philippines. The high pressure system will steer Ewiniar toward the north during the next 24 hours. On its anticipated track, Tropical Storm Ewiniar will move along the east coast of Luzon during the next 24 hours. Ewiniar will start to move toward the northeast on Monday after is moves around the western end of the high pressure system.

Tropical Storm Ewiniar will continue to produce strong winds and locally heavy rain in Luzon during the next 24 hours. Heavy rain is likely to cause flash floods in some locations. Ewiniar could also produce a storm surge of up to 7 feet (2 meters) along the east coast of Luzon where the wind blows the water toward the shore.

Tropical Depression 01W Brings Wind and Rain to Samar

Tropical Depression 01W brought wind and rain to Samar in the Philippines on Friday. At 5:00 p.m. EDT on Friday the center of Tropical Depression 01W was located at latitude 11.6°N and longitude 125.1°E which put it about 25 miles (40 km) northeast of Tacloban, Philippines. The tropical depression was moving toward the north-northwest at 10 m.p.h. (16 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 1004 mb.

A low pressure system over Samar in the Philippines strengthened on Friday. Both the Japan Meteorological Agency and the U.S. Joint Typhoon Warning Center classified the system as a tropical depression. The center of Tropical Depression 01W was over Samar. Thunderstorms were occurring near the center of circulation. Bands of showers and thunderstorms were revolving around the center of Tropical Depression 01W. Storms near the center of circulation generated upper level divergence that pumped mass away from the tropical depression.

Tropical Depression 01W will move through an environment that will be mostly favorable for intensification during the next 24 hours. The tropical depression will move over water where the Sea Surface Temperatures are near 31°C. It will move under the western part of an upper level ridge over the Western North Pacific Ocean. The upper level ridge will produce southeasterly winds that will blow toward the top of the tropical depression. Those winds will cause some vertical wind shear. Even though Tropical Depression 01W will move through a mostly favorable environment, it will not intensify until the center moves back over water.

Tropical Depression 01W will move around the western end of a high pressure system that is east of the Philippines. The high pressure system will steer the tropical depression toward the northwest during the next 24 hours. On its anticipated track, Tropical Depression 01W will move across Samar during the next few hours. It will move across southeastern Luzon on Saturday.

Tropical Depression 01W will continue to drop heavy rain on Samar. Heavy rain is likely to cause flash floods in some locations. The tropical depression will bring gusty winds and heavy rain to southeastern Luzon and Catanduanes Island on Saturday. Flash floods could also occur in those locations. Tropical Depression 01W will also cause rough seas in the areas around Samar and southeastern Luzon.

Tropical Storm Sanvu Spins Northeast of Chuuk

Tropical Storm Sanvu was spinning over the Western North Pacific Ocean northeast of Chuuk on Friday morning. At 5:00 a.m. EDT on Friday the center of Tropical Storm Sanvu was located at latitude 10.2°N and longitude 156.0°E which put it about 345 miles (555 km) northeast of Chuuk. Sanvu was moving toward the northwest at 3 m.p.h. (5 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 Sanvu strengthened during Thursday. More thunderstorms developed near the center of Sanvu’s circulation. Storms near the center of circulation generated upper level divergence that pumped mass away from the tropical storm. Even though Tropical Storm Sanvu strengthened, the distribution of thunderstorms became more asymmetrical. Most of the thunderstorms were occurring in bands in the eastern side of Sanvu’s circulation. Bands in the western half of the circulation consisted primarily of showers and lower clouds. Winds to tropical storm force extended out 70 miles (110 km) from the center of Tropical Storm Sanvu.

Tropical Storm Sanvu will move through an environment that will become unfavorable for intensification during the next 24 hours. Sanvu will move over water where the Sea Surface Temperatures are near 29˚C. However, it will move under the northern side of an upper level ridge over the equatorial Western North Pacific. The ridge will produce westerly winds that will blow toward the top of Sanvu’s circulation. Those winds will cause the vertical wind shear to increase. Stronger vertical wind shear is likely to cause Tropical Storm Sanvu to start to weaken during the next 24 hours.

Tropical Storm Sanvu will move around the southern side of a high pressure system over the Western North Pacific Ocean. The high pressure system will steer Sanvu toward the west-northwest during the next 24 hours. On its anticipated track, Tropical Storm Sanvu will pass north of Chuuk and Fananu during the weekend.

Tropical Storm Sanvu Develops Northwest of Pohnpei

Tropical Storm Sanvu developed over the Western North Pacific Ocean northwest of Pohnpei on Wednesday night. At 5:00 a.m. EDT on Thursday the center of Tropical Storm Sanvu was located at latitude 9.3°N and longitude 156.8°E which put it about 165 miles (265 km) north-northwest of Pohnpei. Sanvu was moving toward the northwest 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 1000 mb.

Former Tropical Depression 01W strengthened on Wednesday night and the Japan Meteorological Agency designated the system as Tropical Storm Sanvu. The inner end of a rainband wrapped around the center of Sanvu’s circulation. Other bands of showers and thunderstorms were revolving around the center of circulation. Storms near the center generated upper level divergence that pumped mass away from the tropical storm. Winds to tropical storm force extended out 60 miles (95 km) from the center of circulation.

Tropical Storm Sanvu will move through an environment favorable for intensification during the next 24 hours. Sanvu will move over water where the Sea Surface Temperatures are near 29˚C. It will move under the axis of an upper level ridge over the equatorial Western North Pacific Ocean. The upper level winds are weak near the axis of the ridge and there will be little vertical wind shear. Tropical Storm Sanvu could intensify during the next 24 hours. Sanvu will move under the northern side of the upper level ridge on Friday and the vertical wind shear will increase. Tropical Storm Sanvu is likely to weaken when the wind shear increases.

Tropical Storm Sanvu will move around the southern side of a high pressure system over the Western North Pacific Ocean. The high pressure system will steer Sanvu toward the northwest during the next 24 hours. On its anticipated track, Tropical Storm Sanvu will move farther away from Pohnpei. Sanvu will be northeast of Chuuk and Fananu on Thursday evening.

Tropical Depression 01W Forms South of Pohnpei

Tropical Depression 01W formed over the Western North Pacific Ocean south of Pohnpei on Wednesday morning. At 11:00 a.m. EDT on Wednesday the center of Tropical Depression 01W was located at latitude 5.2°N and longitude 158.2°E which put it about 145 miles (235 km) south of Pohnpei. Tropical Depression 01W was moving toward the west-northwest at 10 m.p.h. (16 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 1004 mb.

A low pressure system over the Western North Pacific Ocean south of Pohnpei strengthened on Wednesday morning and both the Japan Meteorological Agency and the U.S. Joint Typhoon Warning Center classified the system as a tropical depression. The circulation around Tropical Depression 01W exhibited more organization on Wednesday morning. Bands of showers and thunderstorms were revolving around the center of Tropical Depression 01W. Storms near the center generated upper level divergence that pumped mass away from the tropical depression.

Tropical Depression 01W will move through an environment favorable for intensification during the next 24 hours. The tropical depression will move over water where the Sea Surface Temperatures are near 29˚C. It will move under the axis of an upper level ridge over the equatorial Western North Pacific Ocean. The upper level winds are weak near the axis of the ridge and there will be little vertical wind shear. Tropical Depression 01W is likely to intensify to a tropical storm during the next 24 hours.

Tropical Depression 01W will move around the southern side of a high pressure system over the Western North Pacific Ocean. The high pressure system will steer the tropical depression toward the northwest during the next 24 hours. On its anticipated track, Tropical Depression 01W will pass west of Pohnpei. The tropical depression could be northeast of Chuuk and east of Fananu on Thursday.

Tropical Storm Dujuan Moves Toward Mindanao

Tropical Storm Dujuan moved toward Mindanao on Friday. At 10:00 a.m. EST on Friday the center of Tropical Storm Dujuan was located at latitude 6.2°N and longitude 130.1°E which put it about 320 miles (515 km) east of Davao, Philippines. Dujuan was moving toward the west at 9 m.p.h. (11 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.

The distribution of thunderstorms around Tropical Storm Dujuan was asymmetrical. The strongest thunderstorms were occurring in bands in the northwestern quadrant of Dujuan. Bands in the rest of the tropical storm consisted primarily of showers and lower clouds. Storms northwest of the center of circulation generated upper level divergence which pumped mass away to the northwest of the tropical storm. Winds to tropical storm force extended out 200 miles (320 km) from the center of Dujuan.

Tropical Storm Dujuan will move through an environment unfavorable for intensification during the next 48 hours. Dujuan will move over water where the Sea Surface Temperature is near 29°C. So, there will be enough energy in the upper ocean to support intensification. However, Tropical Storm Dujuan will move under the southern part of an upper level ridge over the Western North Pacific Ocean. The ridge will produce strong easterly winds which will blow toward the top of Dujuan. Those winds are causing the asymmetrical distribution of thunderstorms and they will create strong vertical wind shear. In addition, a surface high pressure system over eastern Asia will produce strong northeasterly winds in the lower levels. Those winds will transport drier air over the Philippines. The combination of vertical wind shear and drier air will likely prevent further intensification of Tropical Storm Dujuan. Dujuan is likely to weaken gradually during the next 36 hours.

Tropical Storm Dujuan will move south of a high pressure system over the Western North Pacific Ocean. The high will steer Dujuan toward the west-northwest during the next several days. On its anticipated track Tropical Storm Dujuan could approach northeastern Mindano in 36 hours. Dujuan could be a tropical storm when it reaches Mindanao. It will bring gusty winds and locally heavy rain to Mindano and other parts of the southern Philippines.

Tropical Storm Dujuan Develops East of Mindanao

Tropical Storm Dujuan developed east of Mindanao on Thursday. At 10:00 a.m. EST on Thursday the center of Tropical Cyclone Dujuan was located at latitude 7.3°N and longitude 131.6°E which put it about 430 miles (695 km) east of Davao, Philippines. Dujuan was moving toward the west-northwest at 4 m.p.h. (6 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 1000 mb.

The circulation around an area of low pressure east of the Philippines strengthened on Thursday morning and the Japan Meteorological Agency designated the system as Tropical Storm Dujuan. The distribution of thunderstorms around Tropical Storm Dujuan was asymmetrical. The strongest thunderstorms were occurring in bands in the western half of Dujuan. Bands in the eastern half of the tropical storm consisted primarily of showers and lower clouds. Storms west of the center of circulation began to generate upper level divergence which pumped mass away to the west of the tropical storm. Winds to tropical storm force extended out 100 miles (160 km) from the center of Dujuan.

Tropical Storm Dujuan will move through an environment somewhat favorable for intensification during the next 36 hours. Dujuan will move over water where the Sea Surface Temperature is near 29°C. It will move under the southern part of an upper level ridge over the Western North Pacific Ocean. The ridge will produce easterly winds which will blow toward the top of Tropical Storm Dujuan. Those winds will create moderate vertical wind shear and they are causing the asymmetrical distribution of thunderstorms. The wind shear will inhibit intensification, but it will not be strong enough to prevent Dujuan from strengthening. Tropical Storm Dujuan is likely to intensify gradually during the next 36 hours.

Tropical Storm Dujuan will move south of a high pressure system over the Western North Pacific Ocean. The high will steer Dujuan toward the west-northwest during the next several days. On its anticipated track Tropical Storm Dujuan could approach northeastern Mindano in 48 hours. Dujuan could bring gusty winds and locally heavy rain to Mindano and other parts of the southern Philippines.

Tropical Storm Vongfong Brings Wind and Rain to Luzon

Tropical Storm Vongfong brought wind and rain to Luzon on Friday.  At 11:00 am. EDT on Friday the center of Tropical Storm Vongfong was located at latitude 15.6°N and longitude 121.2°E which put it about 45 miles (75 km) northeast of Manila, Philippines.  Vongfong was moving toward the north-northwest at 13 m.p.h. (20 km/h).  The maximum sustained wind speed was 65 m.p.h. (105 km/h) and there were wind gusts to 80 m.p.h. (130 km/h).  The minimum surface pressure was 990 mb.

Former Typhoon Vongfong weakened to a tropical storm on Friday after the center passed across northern Samar and southeastern Luzon.  The circulation around Tropical Storm Vongfong was small but it remained well organized.  The strongest winds were occurring in rainbands in the eastern half of the circulation which was over the Philippine Sea.  Winds to tropical storm force extended out 50 miles (80 km) from the center of circulation.  The wind speeds were not as strong over land, although stronger winds may have been occurring at locations in mountainous regions.

Tropical Storm Vongfong dropped locally heavy rain over southeastern and eastern Luzon.  The center of Vongfong passed west of Legaspi and east of Manila.  Heavy rain may have fallen on the slopes of the Mayon Volcano and flash floods could have occurred in that region.

Tropical Storm Vongfong will move around the western end of a high pressure system centered southeast of Japan.  The high steer Vongfong toward the north during the next 24 hours.  The tropical storm will start to move toward the northeast during the weekend after it moves around the western end of the high pressure system.  On its anticipated track Tropical Storm Vongfong will move over northern Luzon during the next 24 hours.  Vongfong will continue to bring gusty winds and drop locally heavy rain over parts of northern Luzon.

Typhoon Vongfong Makes Landfall on Samar

Typhoon Vongfong made landfall on Samar on Thursday.  At 11:00 a.m. EDT on Thursday the center of Typhoon Vongfong was located at latitude 12.5°N and longitude 124.5°E which put it about 10 miles (15 km) west of Catarman, Philippines.  Vongfong was moving toward the west-northwest at 5 m.p.h. (8 km/h).  The maximum sustained wind speed was 100 m.p.h. (160 km/h) and there were wind gusts to 120 m.p.h. (195 km/h).  The minimum surface pressure was 967 mb.

Typhoon Vongfong made landfall on the coast of Samar north of Dolores on Thursday.  Vongfong was the equivalent of a major hurricane at the time of landfall.  The maximum sustained wind speed was 115 m.p.h. (185 km/h).  After Typhoon Vongfong made landfall, it moved west-northwest along the northern coast of Samar.  The center of Vongfong passed near Laoang and Catarman.  There have been reports of wind damage in northern Samar.  Typhoon Vongfong also dropped heavy rain in some locations and flash floods may have occurred.

Typhoon Vongfong began to weaken after the center moved over Samar.  The eye was no longer evident on conventional satellite images.  The winds speeds were decreasing slowly.  Winds to typhoon extended out 30 miles (50 km) from the center of circulation.  Winds to tropical storm force extended out 80 miles (130 km) from the center.

Typhoon Vongfong will move around the western end of a high pressure system centered southeast of Japan.  The high will steer Vongfong toward the northwest during the next 24 hours.  On its anticipated track Typhoon Vongfong will move across eastern Luzon.  The center of Vongfong will move near Bulan, Ligao, Naga, Daet, and Labo.  Typhoon Vongfong will also bring wind and rain to Sorsogon, Legaspi and Tabaco.  Heavy rain could flash floods in areas of steep terrain.

Typhoon Vongfong Nears Landfall in Samar

Typhoon Vongfong neared landfall in Samar on Wednesday night.  At 11:00 p.m. EDT on Wednesday the center of Typhoon Vongfong was located near latitude 12.2°N and longitude 125.8°E which put it about 30 miles (50 km) east of Dolores, Philippines.  Vongfong was moving toward the west at 9 m.p.h. (15 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 959 mb.

Typhoon Vongfong was a small but strong tropical cyclone.  There was a small circular eye at the center of circulation.  The eye was surrounded by a ring of strong thunderstorms.  The strongest winds were occurring in that ring of storms.  Bands of showers and thunderstorms were revolving around the core of the circulation.

Winds to typhoon force extended out 20 miles (30 km) from the center of Typhoon Vongfong.  Winds to tropical storm force extended out 75 miles (120 km) from the center.  The Hurricane Intensity Index (HII) for Vongfong was 19.2.  The Hurricane Size Index (HSI) was 5.6 and the Hurricane Wind Intensity Size Index (HWISI) was 24.8.  Typhoon Vongfong was capable of causing localized serious damage.

Typhoon Vongfong will move around the western end of a high pressure system centered southeast of Japan.  The high will steer Vongfong toward the northwest during the next 24 hours.  On its anticipated track the center of Typhoon Vongfong will make landfall on the coast of northern Samar north of Dolores during the next 6 to 12 hours.  The center of Vongfong could be near Laoang in about 12 hours.  Typhoon Vongfong could move over southeastern Luzon later on Thursday.  The center of Vongfong could be near Legaspi in 18 hours.

The small inner core of Typhoon Vongfong will be capable of causing localized serious wind damage in northern Samar and southeastern Luzon.  Vongfong could bring strong winds to Dolores, Laoang, Catarman, Bulan, Sorsogon and Legaspi.  Typhoon Vongfong will drop locally heavy rain over northern Samar, southeastern Luzon and Catanduanes Island.  Flash floods could occur in some locations.  Vongfong could cause a storm surge of up to 10 feet (3 meters) in parts of northern Samar and southeastern Luzon.