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Tropical Storm Ewiniar Weakens South of Japan

Tropical Storm Ewiniar weakened south of Japan on Thursday. At 11:00 a.m. EDT on Thursday the center of Tropical Storm Ewiniar was located at latitude 30.8°N and longitude 137.7°E which put it about 400 miles (645 km) south-southwest of Tokyo, Japan. Ewiniar was moving toward the northeast 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 995 mb.

Strong vertical wind shear and cooler Sea Surface Temperatures caused Tropical Storm Ewiniar to weaken south of Japan on Thursday. No thunderstorms were occurring in Tropical Storm Ewiniar. Bands revolving around the center of Ewiniar’s circulation consisted primarily of showers and lower clouds. Winds to tropical storm force extended out 90 miles (145 km) from the center of Ewiniar.

Tropical Storm Ewiniar will move through an environment that will be unfavorable for intensification during the next 24 hours. Ewiniar will move over water where the Sea Surface Temperatures are near 24°C. An upper level trough northwest of Japan will produce strong westerly winds that will blow across the top of Ewiniar’s circulation. Those winds will cause strong vertical wind shear. The cooler water and strong vertical wind shear will cause Tropical Storm Ewiniar to continue to weaken during the next 24 hours.

Tropical Storm Ewiniar will move around the northern side of a high pressure system over the Western North Pacific Ocean. The high pressure system and the upper level trough northwest of Japan will steer Ewiniar toward the northeast during the next 24 hours. On its anticipated track, Tropical Storm Ewiniar will remain south of Japan. Ewiniar will pass south of Tokyo in 12 hours.

Ewiniar Weakens to a Tropical Storm

Former Typhoon Ewiniar weakened to a tropical storm south of Japan on Wednesday. At 11:00 a.m. EDT on Wednesday the center of Tropical Storm Ewiniar was located at latitude 26.9°N and longitude 133.5°E which put it about 120 miles (195 km) northeast of Minamidaitojima, Japan. Ewiniar was moving toward the northeast at 18 m.p.h. (30 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.

After bringing strong winds and heavy rain to Minamidaitojima, former Typhoon Ewiniar weakened to a tropical storm on Wednesday. An upper level trough northwest of Japan was producing strong southwesterly winds that were blowing toward the top of Ewiniar’s circulation. Those winds were causing strong vertical wind shear. The wind shear caused former Typhoon Ewiniar to weaken.

The strong vertical wind shear was also affecting the structure of Tropical Storm Ewiniar. The strong upper level southwesterly winds were causing the upper part of Ewinar’s circulation to tilt toward the northeast. Thunderstorms were still occurring in bands in the northern and eastern parts of Tropical Storm Ewiniar. Bands in the southern and western parts of Ewiniar consisted primarily of showers and lower clouds.

The circulation around Typhoon Ewiniar was still small. Winds to tropical storm force extended out 100 miles (160 km) from the center of circulation.

Tropical Storm Ewiniar will move through an environment that will be unfavorable for intensification during the next 24 hours. Ewiniar will move over water where the Sea Surface Temperatures are near 25°C. The upper level trough northwest of Japan will continue to cause strong vertical wind shear. The cooler water and strong vertical wind shear will cause Tropical Storm Ewiniar to weaken during the next 24 hours. If the upper level winds get stronger, they could blow the top off of Ewiniar’s circulation. The cooler water and strong vertical wind shear will also cause Tropical Storm Ewiniar to begin to make a transition to an extratropical cyclone.

Tropical Storm Ewiniar will move around the northern side of a high pressure system over the Western North Pacific Ocean. The high pressure system and the upper level trough northwest of Japan will steer Ewiniar toward the northeast during the next 24 hours. On its anticipated track, Tropical Storm Ewiniar will remain south of Japan.

Typhoon Ewiniar Passes South of Okinawa

Typhoon Ewiniar passed south of Okinawa on Tuesday. At 11:00 a.m. EDT on Tuesday the center of Typhoon Ewiniar was located at latitude 22.1°N and longitude 128.6°E which put it about 350 miles (565 km) south of Okinawa. Ewiniar was moving toward the northeast at 22 m.p.h. (35 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 980 mb.

Typhoon Ewiniar was weakening as it passed south of Okinawa on Tuesday. An upper level trough west of Japan was producing southwesterly winds that were blowing toward the top of Ewiniar’s circulation. Those winds were causing moderate vertical wind shear. The wind shear was causing Typhoon Ewiniar to weaken.

The vertical wind shear was also affecting the structure of Typhoon Ewiniar. An eye was no longer visible at the center of Ewiniar’s circulation. Thunderstorms were occurring in a band that wrapped around the southern and eastern sides of the center of circulation. Bands in the other parts of Typhoon Ewiniar consisted primarily of showers and lower clouds. Storms near the center of Ewiniar still generated upper level divergence that pumped mass away from the typhoon.

The circulation around Typhoon Ewiniar was still small. Winds to typhoon force extended out 25 miles (40 km) from the center of Ewiniar’s circulation. Winds to tropical storm force extended out 90 miles (145 km) from the center of circulation.

Typhoon Ewiniar will move through an environment that will be unfavorable for intensification during the next 24 hours. Ewiniar will move over water where the Sea Surface Temperatures are near 28°C. The upper level trough west of Japan will continue to cause moderate vertical wind shear. Since the circulation around Ewiniar is small, the wind shear will cause Typhoon Ewiniar to weaken during the next 24 hours.

Typhoon Ewiniar will move around the northern side of a high pressure system over the Western North Pacific Ocean. The high pressure system and the upper level trough west coast of Japan will steer Ewiniar toward the northeast during the next 24 hours. On its anticipated track, Typhoon Ewiniar will pass near Minamidaitojoma in 12 to 18 hours. Ewiniar will bring strong winds and locally heavy rain to Minamidaitojima.

Typhoon Ewiniar Moves Away From Luzon

Typhoon Ewiniar moved away from Luzon on Monday. At 11:00 a.m. EDT on Monday the center of Typhoon Ewiniar was located at latitude 17.4°N and longitude 124.3°E which put it about 185 miles (300 km) east of Tuguegarao, Philippines. Ewiniar was moving toward the northeast at 9 m.p.h. (15 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 966 mb.

After intensifying rapidly on Sunday, Typhoon Ewiniar showed signs of weakening on Monday. A small eye with a diameter of 5 miles (8 km) was still present at the center of Ewiniar’s circulation. However, there were breaks in the ring of thunderstorms surrounding the eye. Storms near the center of Ewiniar still were generating upper level divergence that was pumping mass away from the typhoon. Bands of showers and thunderstorms were revolving around the center of Typhoon Ewiniar.

The circulation around Typhoon Ewiniar was small. Winds to typhoon force extended out 20 miles (30 km) from the center of Ewiniar’s circulation. Winds to tropical storm force extended out 75 miles (120 km) from the center of circulation.

Typhoon Ewiniar will move through an environment that will become less favorable for intensification during the next 24 hours. Ewiniar will move over water where the Sea Surface Temperatures are near 30°C. An upper level trough near the east coast of China will produce southwesterly winds that will blow toward the top of Ewiniar’s circulation. Those winds will cause the vertical wind shear to increase. Since the circulation around Ewiniar is small, an increase in wind shear will have a larger effect on the typhoon. Typhoon Ewiniar is likely to weaken during the next 24 hours when the vertical wind shear increases.

Typhoon Ewiniar will move around the northwestern part of a high pressure system over the Western North Pacific Ocean. The high pressure system and the upper level trough near the east coast of China will steer Ewiniar toward the northeast during the next 24 hours. On its anticipated track, Typhoon Ewiniar will continue to move farther away from Luzon. Ewiniar will pass southeast of the Ryukyu Islands during the next few days.

Elsewhere, Tropical Cyclone Remal continued to drop heavy rain on Bangladesh. There were reports that Remal caused fatalities in Bangladesh. At 5:00 a.m. EDT on Monday the center of Tropical Cyclone Remal was located at latitude 23.1°N and longitude 89.2°E which put it about 85 miles (140 km) southwest of Dhaka, Bangladesh. Remal was moving toward the north-northeast at 5 m.p.h. (8 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 979 mb.

Ewiniar Rapidly Intensifies to a Typhoon East of Luzon

Former Tropical Storm Ewiniar rapidly intensified to a typhoon east of Luzon on Sunday. At 11:00 a.m. EDT on Sunday the center of Typhoon Ewiniar was located at latitude 15.2°N and longitude 122.5°E which put it about 125 miles (200 km) east-northeast of Manila, Philippines. Ewiniar was moving toward the northeast at 7 m.p.h. (11 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 966 mb.

Former Tropical Storm Ewiniar rapidly intensified to a typhoon after it moved east of Luzon on Sunday. A very small eye with a diameter of 5 miles (8 km) formed at the center of Typhoon Ewiniar. 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 Ewiniar’s circulation. Storms near the center generated upper level divergence that pumped mass away from the typhoon. The removal of mass caused the surface pressure to decrease rapidly.

The circulation around Typhoon Ewiniar was small. Winds to typhoon force extended out 20 miles (30 km) from the center of Ewiniar’s circulation. Winds to tropical storm force extended out 60 miles (95 km) from the center of circulation.

Typhoon Ewiniar will move through an environment that will be very 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 southwesterly winds that will blow toward the top of Ewiniar’s circulation. The winds in the lower levels of the atmosphere will also blow from the southwest and there will be little vertical wind shear. Typhoon Ewiniar is likely to intensify during the next 24 hours. Ewiniar could continue to intensify rapidly. If the inner end of a rainband wraps around the existing eye and eyewall, then an eyewall replacement cycle could interrupt the intensification.

Typhoon 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 northeast during the next 24 hours. On its anticipated track, Typhoon Ewiniar will move farther away from Luzon during the next 24 hours. Ewiniar will pass southeast of the Ryukyu Islands during the early part of next week.

Typhoon Ewiniar will continue to produce strong winds and locally heavy rain in Luzon until it moves farther to the northeast. Heavy rain is likely to cause flash floods in some locations.

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.