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Tropical Storm Ma-on Makes Landfall in Southeast China

Tropical Storm Ma-on made landfall in southeast China on Thursday morning. At 5:00 a.m. EDT on Thursday the center of Tropical Storm Ma-on was located at latitude 22.0°N and longitude 109.2°E which put it about 80 miles (130 km) east of Qinzhou. Ma-on was moving toward the west-northwest at 20 m.p.h. (32 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 Ma-on made landfall on the coast of southeastern China between Dianbai and Zhanjiang on Thursday morning. The center of Ma-on made landfall near Wuchuan. Ma-on was a strong tropical storm at the time of landfall. The maximum sustained wind speed was 65 m.p.h. (105 km/h). The distribution of thunderstorms and heavy rain in Tropical Storm Ma-on was asymmetrical. Many of the thunderstorms with heavy rain were occurring in the southern half of Ma-on’s circulation. The strongest winds were occurring over the South China Sea. Winds to tropical storm force extended out 130 miles (210 km) from the center of Tropical Storm Ma-on.

Tropical Storm Ma-on will move around the southwestern part of a high pressure system over the Western North Pacific during the next 36 hours. The high pressure system will steer Ma-on toward the west-northwest. On its anticipated track Tropical Storm Ma-on will move inland over southeastern China and northern Vietnam. Ma-on will drop locally heavy rain over parts of southeastern China and northern Vietnam. Heavy rain could cause flash floods in some locations.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Tokage was weakening as it sped away from Japan. At 5:00 a.m. EDT on Thursday the center of Tropical Storm Tokage was located at latitude 41.3°N and longitude 153.9°E which put it about 610 miles (985 km) east of Misawa, Japan. Tokage was moving toward the northeast at 25 m.p.h. (40 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 987 mb.

Tropical Storm Ma-on Moves over South China Sea

Tropical Storm Ma-on moved over the South China Sea southeast of Hong Kong on Wednesday morning. At 5:00 a.m. EDT on Wednesday the center of Tropical Storm Ma-on was located at latitude 20.0°N and longitude 116.1°E which put it about 245 miles (395 km) southeast of Hong Kong. Ma-on was moving toward the west-northwest at 12 m.p.h. (19 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 984 mb.

Tropical Storm Ma-on maintained its intensity as it moved over the South China Sea southeast of Hong Kong on Wednesday morning. The inner end of a rainband wrapped around the southern and eastern sides of the center of Ma-on’s circulation. However, the distribution of thunderstorms in the rest of Tropical Storm Ma-on was asymmetrical. The strongest thunderstorms were occurring in bands in the southern and western parts of Ma-on. Bands in the eastern and northern parts of the circulation consisted primarily of showers and lower clouds. An upper level ridge over China was producing east-northeasterly winds that were blowing toward the top of Tropical Storm Ma-on. Those winds were causing moderate vertical wind shear and the wind shear was causing the asymmetrical distribution of thunderstorms.

Tropical Storm Ma-on will move through an environment somewhat favorable for intensification during the next 24 hours. Ma-on will move over water where the Sea Surface Temperatures are 29˚C. The upper level ridge over China will continue to cause vertical wind shear. If the vertical wind shear does not increase, then Tropical Storm Ma-on could strengthen during the next 24 hours. There is a chance Ma-on could strengthen to a typhoon.

Tropical Storm Ma-on will move around the southwestern part of a high pressure system over the Western North Pacific Ocean. The high pressure system will steer Ma-on toward the west-northwest during the next 36 hours. On its anticipated track Tropical Storm Ma-on could be south of Hong Kong in 12 hours. The center of Ma-on could make landfall on the south coast of China near Yangjiang and Dianbai in 24 hours. Tropical Storm Ma-on will bring gusty winds and locally heavy rain to southern China. Heavy rain could cause flash floods in some locations.

Elsewhere over the Western North Pacific Ocean, Typhoon Tokage was passing east of Japan. At 5:00 a.m. EDT on Wednesday the center of Typhoon Tokage was located at latitude 35.8°N and longitude 149.4°E which put it about 475 miles (770 km) east of Tokyo, Japan. Tokage was moving toward the north-northeast at 13 m.p.h. (20 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 961 mb.

Tropical Storm Ma-on Brings Wind and Rain to Northern Luzon

Tropical Storm Ma-on brought wind and rain to northern Luzon on Tuesday morning. At 5:00 a.m. EDT on Tuesday the center of Tropical Storm Ma-on was located at latitude 18.0°N and longitude 121.2°E which put it about 50 miles (80 km) southeast of Claveria, Philippines. Ma-on was moving toward the northwest at 12 m.p.h. (19 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 985 mb.

Tropical Storm Ma-on brought gusty winds and locally heavy rain to parts of northern Luzon on Tuesday morning. The center of Ma-on made landfall on the northeastern coast of Luzon east of Tuguegarao during Monday night. Tropical Storm Ma-on moved northwest across northern Luzon. Ma-on intensified before it made landfall and it was almost a typhoon at the time of landfall. Winds to tropical storm force extended out 120 miles (195 km) from the center of Ma-on’s circulation.

Tropical Storm Ma-on will move through an environment favorable for intensification when it moves over the South China Sea. Ma-on will move over water where the Sea Surface Temperatures are 29˚C. It will move under the southern part of an upper level ridge over China. The ridge will produce easterly winds that will blow toward the top of Ma-on’s circulation. Those winds will cause some vertical wind shear, but the wind shear will not be enough to prevent intensification. Tropical Storm Ma-on is likely to strengthen to a typhoon during the next 36 hours.

Tropical Storm Ma-on will move around the southwestern part of a high pressure system over the Western North Pacific Ocean. The high pressure system will steer Ma-on toward the west-northwest during the next 36 hours. On its anticipated track Tropical Storm Ma-on will move away from northern Luzon later on Tuesday. Ma-on will continue to bring gusty winds and locally heavy rain to northern Luzon until it moves farther away. Heavy rain could cause flash floods in some locations. Ma-on could be south of Hong Kong in 36 hours.

Elsewhere over the Western North Pacific Ocean, former Tropical Storm Tokage intensified to a typhoon southeast of Japan. At 5:00 a.m. EDT on Tuesday the center of Typhoon Tokage was located at latitude 30.8°N and longitude 149.6°E which put it about 670 miles (1080 km) southeast of Tokyo, Japan. Tokage was moving toward the north-northwest at 19 m.p.h. (30 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 979 mb.

Tropical Storm Ma-on Develops near Northern Luzon

Tropical Storm Ma-on developed near northern Luzon on Sunday night. At 5:00 a.m. EDT on Monday the center of Tropical Storm Ma-on was located at latitude 16.3°N and longitude 123.4°E which put it about 100 miles (160 km) southeast of Tuguegarao, Philippines. Ma-on was moving toward the west at 11 m.p.h. (17 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.

Former Tropical Depression 10W strengthened to Tropical Storm Ma-on just to the east of northern Luzon on Sunday night. The distribution of thunderstorms in Ma-on continued to be asymmetrical. Most of the thunderstorms were in bands in the southern half of Ma-on’s circulation. The bands in the northern half of the circulation consisted primarily of showers and lower clouds. A strong upper level ridge over China was producing strong northerly winds that were blowing toward the top of Tropical Storm Ma-on. Those winds were causing moderate vertical wind shear and the wind shear was causing the asymmetrical distribution of thunderstorms.

Tropical Storm Ma-on will move through an environment favorable for intensification during the next 12 hours. Ma-on will move over water where the Sea Surface Temperatures are 30˚C. The upper level ridge over China will continue to produce northerly winds that will blow toward the top of Ma-on’s circulation. However, Tropical Storm Ma-on could strengthen during the next 12 hours. Ma-on will weaken when the center passes over northern Luzon, but it could strengthen again over the South China Sea later this week.

Tropical Storm Ma-on will move around the southwestern part of a high pressure system over the Western North Pacific Ocean. The high pressure system will steer Ma-on toward the west-northwest during the next 24 hours. On its anticipated track Tropical Storm Ma-on will hit northern Luzon in 12 hours. Ma-on will bring gusty winds and locally heavy rain to northern Luzon. Heavy rain could cause flash floods in some locations.

Elsewhere over the Western North Pacific Ocean, Tropical Storm Tokage formed southeast of Japan. At 5:00 a.m. EDT on Monday the center of Tropical Storm Tokage was located at latitude 25.5°N and longitude 151.6°E which put it about 1010 miles (1635 km) southeast of Tokyo, Japan. Tokage was moving toward the north at 11 m.p.h. (17 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 998 mb.

Tropical Depression Forms East of Luzon

A tropical depression formed over the Western North Pacific Ocean east of Luzon on Sunday morning. At 5:00 a.m. EDT on Sunday the center of the tropical depression was located at latitude 17.4°N and longitude 127.3°E which put it about 350 miles (565 km) east of Luzon. The tropical depression was moving toward the west at 5 m.p.h. (8 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 1000 mb.

A distinct low level center of circulation formed in an area of lower pressure east of Luzon on Sunday morning and the Japan Meteorological Agency classified the system as a tropical depression. The distribution of thunderstorms in the tropical depression was asymmetrical. Most of the thunderstorms were in bands in the western half of the tropical depression. The bands in the eastern half of the circulation consisted primarily of showers and lower clouds. A strong upper level ridge over China was producing strong northeasterly winds that were blowing toward the top of the tropical depression. Those winds were causing moderate vertical wind shear and the wind shear was causing the asymmetrical distribution of thunderstorms.

The tropical depression 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 30˚C. The upper level ridge over China will continue to produce northeasterly winds that will blow toward the top of the tropical depression. However, the upper level winds are forecast to weaken. The vertical wind shear could decrease during the next 24 hours. The tropical depression is forecast to strengthen to a tropical storm.

The tropical depression will move around the southwestern part of a high pressure system over the Western North Pacific Ocean. The high pressure system will steer the tropical depression toward the west during the next 24 hours. On its anticipated track the tropical depression could approach northeastern Luzon in 24 hours. It is likely to be a tropical storm when it approaches Luzon. The weather system will bring gusty winds and locally heavy rain to northern Luzon. Heavy rain could cause flash floods in some locations.

Potential Tropical Cyclone Four Brings Rain to Northeast Mexico

A tropical wave designated as Potential Tropical Cyclone Four brought rain to northeastern Mexico on Saturday night. At 11:00 p.m. EDT on Saturday the center of Potential Tropical Cyclone Four was located at latitude 25.3°N and longitude 97.9°W which put it about 60 miles (95 km) southwest of the Mouth of the Rio Grande River. Potential Tropical Cyclone Four was moving toward the northwest at 13 m.p.h. (20 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 1010 mb.

A tropical wave designated as Potential Tropical Cyclone Four moved inland over northeastern Mexico during Saturday night. A center of circulation never formed in the lower levels of the of the tropical wave and so it never developed into a tropical depression or a tropical storm. The tropical wave will move northwest over the Lower Rio Grande Valley on Sunday. Thunderstorms in the tropical wave could drop locally heavy rain over northeastern Mexico and South Texas. Some places could receive 3 to 5 inches (75 to 125 mm) of rain. The heavy rain could cause flash floods in some locations.

Potential Tropical Cyclone Four Prompts Tropical Storm Warnings for Texas and Mexico

A weather system over the southwestern Gulf of Mexico was designated as Potential Tropical Cyclone Four on Friday afternoon and Tropical Storm Warnings were issued for portions of the coasts of Texas and Mexico. At 5:00 p.m. EDT on Friday the center of Potential Tropical Cyclone Four was located at latitude 20.7°N and longitude 94.5°W which put it about 400 miles (640 km) south-southeast of the Mouth of the Rio Grande River. Potential Tropical Cyclone Four was moving toward the northwest at 14 m.p.h. (22 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 1009 mb.

A Tropical Cyclone Warning was issued for the portion of the coast from Port Mansfield, Texas to Boca de Catan, Mexico.

A weather system over the southwestern Gulf of Mexico exhibited more organization on Friday. However, observations from a U.S. Air Force Reserve Hurricane Hunter plane on Friday afternoon indicated that there was not a well defined center of low level circulation in the weather system. The National Hurricane Center designated the system as Potential Tropical Cyclone Four in order to issue a Tropical Storm Warning for the coast of South Texas. The government of Mexico also issued a Tropical Storm Warning for the northern coast of Mexico.

More thunderstorms developed in Potential Tropical Cyclone Four on Friday afternoon. Some of the thunderstorms in the eastern half of the circulation appeared to be organizing into bands. The thunderstorms in Potential Tropical Cyclone Four began to generate upper level divergence that pumped mass away from the weather system.

Potential Tropical Cyclone Four will move through an environment favorable for intensification during the next 18 hours. Potential Tropical Cyclone Four will move over water where the Sea Surface Temperatures are 30˚C. It will move under an upper level ridge over the southwestern Gulf of Mexico. The upper level winds are weak in that region and there will be little vertical wind shear. Potential Tropical Cyclone Four is likely to intensify during the next 18 hours. A well defined low level center of circulation will have to develop in order for the system to become a tropical storm.

Potential Tropical Cyclone Four will move around the southwestern part of a subtropical high pressure system that extends over the Gulf of Mexico. The high pressure system will steer Potential Tropical Cyclone Four toward the northwest during the next 24 hours. On its anticipated track Potential Tropical Cyclone Four will make landfall south of Brownsville, Texas during Saturday night. It will bring locally heavy rain and gusty winds to South Texas and northern Mexico. Locally heavy rain could cause flash floods in some locations.

Tropical Cyclone 04B Makes Landfall South-southwest of Kolkata

Tropical Cyclone 04B made landfall on the coast of India south-southwest of Kolkata on Friday. At 11:00 a.m. EDT on Friday the center of Tropical Cyclone 04B was located at latitude 21.9°N and longitude 87.7°E which put it about 65 miles (105 km) south-southwest of Kolkata India. The tropical cyclone was moving toward the west-northwest at 9 m.p.h. (15 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.

Tropical Cyclone 04B strengthened during the hours prior to landfall. The maximum sustained wind speed was 50 m.p.h. (80 km/h) when Tropical Cyclone 04B made landfall on the coast of India south-southwest of Kolkata. Winds to tropical storm force extended out 85 miles (135 km) from the center of Tropical Cyclone 04B. Bands of showers and thunderstorms were revolving around a broad center of circulation.

Tropical Cyclone 04B will move south of a high pressure system over southern Asia. The high pressure system will steer the tropical cyclone toward the west-northwest during the next 48 hours. On its anticipated track Tropical Cyclone 04B will move farther inland over central India during the weekend. The tropical cyclone will gradually weaken when it moves farther inland. Tropical Cyclone 04B will drop heavy rain over parts of central India. Heavy rain could cause flash floods in some locations.

Tropical Cyclone 04B Forms over Northern Bay of Bengal

Tropical Cyclone 04B formed over the northern Bay of Bengal on Thursday afternoon. At 5:00 p.m. EDT on Thursday the center of Tropical Cyclone 04B was located at latitude 20.7°N and longitude 89.5°E which put it about 175 miles (280 km) southeast of Kolkata India. The tropical cyclone was moving toward the west-northwest at 9 m.p.h. (15 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 992 mb.

Tropical Cyclone 04B developed over the northern Bay of Bengal southeast of Koklata, India on Thursday afternoon. The distribution of thunderstorms around the tropical cyclone was asymmetrical. The strongest thunderstorms were occurring in bands in the southern and western parts of the circulation. Bands in the northern and eastern parts of Tropical Cyclone 04B consisted primarily of showers and lower clouds. An upper level ridge over southern Asia was producing easterly winds that were blowing toward the top of the tropical cyclone’s circulation. Those winds were causing moderate vertical wind shear and the wind shear was contribution to the asymmetrical distribution of thunderstorms. Winds to tropical storm force extended out 40 miles (65 km) from the center of Tropical Cyclone 04B.

Tropical Cyclone 04B will move through an environment somewhat favorable for intensification during the next 12 hours. The tropical cyclone will move over water where the Sea Surface Temperatures are near 29˚C. However, the upper level ridge over southern Asia will continue to cause moderate vertical wind shear. The wind shear will inhibit intensification. Tropical Cyclone 04B could intensify during the next 12 hours, if the upper level winds do not get any stronger.

Tropical Cyclone 04B will move south of a high pressure system over southern Asia. The high pressure system will steer the tropical cyclone toward the west-northwest during the next 24 hours. On its anticipated track the center of Tropical Cyclone 04B could be south of Kolkata in 12 hours. It could make landfall on the coast of India southwest of Kolkata in 18 hours. Tropical Cyclone 04B will bring gusty winds and locally heavy rain to the region of India south and west of Kolkata. Heavy rain could cause flash floods in some locations.

Tropical Storm Ivette Develops Unexpectedly

Tropical Storm Ivette developed unexpectedly over the Eastern North Pacific Ocean southwest of Baja California on Monday afternoon. At 5:00 p.m. EDT on Monday the center of Tropical Storm Ivette was located at latitude 17.7°N and longitude 113.9°W which put it about 445 miles (710 km) southwest of the southern tip of Baja California. Ivette was moving toward the west at 2 m.p.h. (3 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 1005 mb.

The circulation around former Tropical Depression Ten-E strengthened unexpectedly on Monday afternoon and the National Hurricane Center upgraded the system to Tropical Storm Ivette. An upper level ridge west of Mexico had been producing moderate easterly winds that were blowing across the top of former Tropical Depression Ten-E’s circulation. Those winds were causing moderate vertical wind shear and the shear was blowing the tops off of any thunderstorms that tried to form in the tropical depression. The strengthen of the upper level winds weakened for a few hours on Monday, which caused the vertical wind shear to decrease. New thunderstorms formed in bands in the western half of former Tropical Depression Ten-E. Downdrafts in those thunderstorms transported stronger winds to the surface and the depression strengthened to Tropical Storm Ivette. Tropical storm force were occurring up to 90 miles (145 km) in the northwestern quadrant of Ivette’s circulation. The winds in the other quadrants were blowing at less than tropical storm force.

Tropical Storm Ivette will move through an environment unfavorable for intensification during the next several days. Ivette will move over water where the Sea Surface Temperatures are 27˚C. However, the upper level ridge west of Mexico will continue to cause moderate vertical wind shear. Tropical Storm Ivette is likely to weaken during the next 48 hours, although some fluctuations in intensity could occur if the strength of the upper level winds varies.

Tropical Storm Ivette will move around the southern part of a high pressure system over the Eastern North Pacific Ocean. The high pressure system will steer Ivette slowly toward the west during the next 48 hours. On its anticipated track Tropical Storm Ivette will move a little farther away from Baja California.