Monthly Archives: July 2023

Typhoon Talim Brings Wind and Rain to Southern China

Typhoon Talim brought wind and rain to southern China on Monday. At 11:00 a.m. EDT on Monday the center of Typhoon Talim was located at latitude 21.3°N and longitude 110.5°E which put it about 10 miles (15 km) east of Zhanjiang, China. Talim was moving toward the west-northwest at 14 m.p.h. (22 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 973 mb.

The center of Typhoon Talim made landfall on the south coast of China near Zhanjiang on Monday. The size of the circulation around Typhoon Talim increased as it approached the coast. Winds to typhoon force extended out 65 miles (105 km) from the center of Talim’s circulation. Winds to tropical storm force extended out 155 miles (250 km) from the center of circulation.

The eye of Typhoon Talim was on the coast of southern China near Zhanjiang. 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 dropping heavy rain over parts of Guangdong, Guangxi and Hainan. Heavy rain could cause flash floods in some locations. Winds blowing around the northern side of Typhoon Talim were pushing water toward the coast and the winds were generating a storm surge of up to seven feet (two meters).

Typhoon Talim will move around the southwestern part of a subtropical high pressure system over the Western North Pacific Ocean. The high pressure system will steer Talim toward the west-northwest during the next 36 hours. On its anticipated track, Typhoon Talim will move inland over southern China. Typhoon Talim will continue to bring strong winds and locally heavy rain to southern China during the next 36 hours. Talim will produce strong winds and heavy rain in southwestern Guangdong, Guangxi and Hainan. Locally heavy rain could cause flash floods in some locations. Talim will also bring gusty winds and locally heavy rain to parts of northern Vietnam when it moves farther west.

Talim Strengthens to a Typhoon South of Hong Kong

Former Tropical Storm Talim strengthened to a typhoon south of Hong Kong on Sunday. At 5:00 p.m. EDT on Sunday the center of Typhoon Talim was located at latitude 19.8°N and longitude 113.7°E which put it about 180 miles (290 km) south of Hong Kong. Talim was moving toward the west-northwest at 8 m.p.h. (13 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 975 mb.

Former Tropical Storm Talim strengthened steadily during the weekend and Talim reached typhoon intensity on Sunday. The inner end of a rainband wrapped around the center of Typhoon Talim’s circulation. An eye was evident on conventional and microwave satellite images. The eye was surrounded by a broken ring of thunderstorms and the strongest winds were occurring in the ring of storms. Bands of showers and thunderstorms revolved around the core of Typhoon Talim. Storms near the core generated upper level divergence that pumped mass away from the typhoon. Winds to typhoon force extended out 20 miles (30 km) in the northern side of Talim’s circulation. Winds to tropical storm force extended out 140 miles (220 km) from the center of Talim.

Typhoon Talim will move through an environment favorable for intensification during the next 24 hours. Talim will move over water where the Sea Surface Temperatures are near 30˚C. It will move under the southern side of an upper level ridge that extends from the Western North Pacific Ocean to China. The ridge will produce easterly winds that will blow toward the top of Talim’s circulation. Those winds will cause some vertical wind shear but the wind shear will not be enough to prevent intensification. Typhoon Talim will intensify during the next 24 hours.

Typhoon Talim will move around the southwestern part of a subtropical high pressure system over the Western North Pacific Ocean. The high pressure system will steer Talim toward the west-northwest during the next 24 hours. On its anticipated track, the center of Typhoon Talim will make landfall on the coast of south China near Zhanjiang and Leizhou in 24 hours. Typhoon Talim will bring strong winds and locally heavy rain to southern China. Talim will bring strong winds and heavy rain to Guangdong, Guangxi and Hainan. Locally heavy rain could cause flash floods in some locations. Typhoon Talim could cause a storm surge of up to 7 feet (2 meters) along the coast of southern China. Talim will also bring gusty winds and locally heavy rain to parts of northern Vietnam early next week.

Hurricane Calvin Churns Toward the Central Pacific

Hurricane Calvin churned toward the Central Pacific Ocean on Saturday. At 5:00 p.m. EDT on Saturday the center of Hurricane Calvin was located at latitude 15.0°N and longitude 130.4°W which put it about 1660 miles (2670 km) east of Hilo, Hawaii. Calvin was moving toward the west at 16 m.p.h. (26 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 975 mb.

Hurricane Calvin weakened on Saturday when it moved over cooler water east of Hawaii. Thunderstorms around the center of Calvin’s circulation did not rise as high into the atmosphere. The structure of Hurricane Calvin remained well organized even though the hurricane was weaker. A small circular eye was still present at the center of Calvin’s circulation. The eye was surrounded by a broken ring of thunderstorms and the strongest winds were occurring in that ring of storms. Bands of showers and thunderstorms were revolving around the core of Hurricane Calvin. Storms near the core still generated upper level divergence that pumped mass away from the hurricane.

The circulation around Hurricane Calvin was small. Winds to hurricane force extended out 25 miles (40 km) from the center of Calvin’s circulation. Winds to tropical storm force extended out 105 miles (165 km) from the center of circulation. The Hurricane Intensity Index (HII) for Hurricane Calvin was 16.5. The Hurricane Size Index (HSI) was 9.3 and the Hurricane Wind Intensity Size Index (HWISI) was 25.8.

Hurricane Calvin will move through an environment that will be unfavorable for intensification during the next 24 hours. Calvin will move over water where the Sea Surface Temperatures are near 25˚C. It will move through a region where then upper level winds that are weak and there will be little vertical wind shear. Hurricane Calvin will continue to weaken during the next 24 hours because of the cooler water even though there will be little vertical wind shear.

Hurricane Calvin will move around the southern part of a subtropical high pressure system over the Eastern and Central Pacific Ocean. The high pressure system will steer Calvin toward the west during the next several days. On its anticipated track, Hurricane Calvin will continue to move toward the Central Pacific Ocean. Calvin could approach Hawaii on Tuesday. Calvin could still be a tropical storm when it approaches Hawaii.

Subtropical Storm Don Spins over the Central Atlantic

Subtropical Storm Don was spinning over the Central Atlantic Ocean on Saturday. At 11:00 a.m. EDT on Saturday the center of Subtropical Storm Don was located at latitude 36.5°N and longitude 48.8°W which put it about 1200 miles (1930 km) west of the Azores. Don was moving toward the 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 1006 mb.

Subtropical Storm Don weakened a little on Saturday as the environment became less favorable. Many of the bands revolving around the center of Don’s circulation consisted primarily of showers and lower clouds. Winds to tropical storm force extended out 175 miles (280 km) in the eastern side of Subtropical Storm Don. Winds in the western side of the circulation were blowing at less than tropical storm force. Subtropical Storm Don moved over slightly cooler water and less energy was transferred from the ocean to the atmosphere. In addition, the center of Don’s circulation was under the southeastern part of an upper level low over the Central Atlantic. The upper level low was producing southeasterly winds that were blowing across the top of Subtropical Storm Don. Those winds were causing moderate vertical wind shear. The cooler water and moderate vertical wind shear caused Subtropical Storm Don to weaken.

Subtropical Storm Don will move through an environment unfavorable for intensification during the next 24 hours. Don will move over water where the Sea Surface Temperatures are near 25˚C. The upper level low will continue to cause moderate vertical wind shear. The upper level low could also circulate sinking, drier air around the southern side of Don’s circulation. Subtropical Storm Don could weaken a little more during the next 24 hours, but its intensity may not change much.

Subtropical Storm Don will move around the northwestern part of a subtropical high pressure system over the Atlantic Ocean during the next 24 hours. The high pressure system will steer Don toward the north during the next 24 hours. Don is likely to move toward the east on Sunday. On its anticipated track, Subtropical Storm Don will meander west of the Azores during the next few days.

Tropical Storm Talim Forms over South China Sea

Tropical Storm Talim formed over the South China Sea during Friday night. At 5:00 a.m. EDT on Saturday the center of Tropical Storm Talim was located at latitude 18.2°N and longitude 117.7°E which put it about 360 miles (585 km) southeast of Hong Kong. Talim was moving toward the northwest 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 992 mb.

A large low pressure system over the South China Sea strengthened during Friday night and the Japan Meteorological Agency designated the system as Tropical Storm Talim. The circulation around Tropical Storm Talim was very large. Winds to tropical storm force extended out 200 miles (320 km) in the northwestern quadrant of Talim’s circulation. Winds to tropical storm force extended out 90 miles (145 km) in the eastern side of the circulation. Even though the circulation around Tropical Storm Talim was large, the winds were weaker near the center of circulation. There were few thunderstorms near the center of circulation. Thunderstorms were occurring in bands in the northern and southern sides of Tropical Storm Talim.

Tropical Storm Talim will move through an environment somewhat favorable for intensification during the next 24 hours. The water at the surface of the South China Sea is very warm. Talim will move over water where the Sea Surface Temperatures are near 30˚C. It will move under the southern side of an upper level ridge that extends from the Western North Pacific Ocean to China. The ridge will produce easterly winds that will blow toward the top of Talim’s circulation. Those winds will cause moderate vertical wind shear and the shear will inhibit intensification. Tropical Storm Talim is likely to intensify during the next 24 hours in spite of the vertical wind shear.

Tropical Storm Talim will move around the southwestern part of a subtropical high pressure system over the Western North Pacific Ocean. The high pressure system will steer Talim toward the northwest during the weekend. On its anticipated track Tropical Storm Talim could be south of Hong Kong in less than 48 hours. Talim could approach the coast of southern China early next week. Tropical Storm Talim could be a typhoon when it approaches southern China.

Calvin Rapidly Intensifies to a Major Hurricane

Hurricane Calvin rapidly intensified to a major hurricane over the Eastern North Pacific Ocean on Friday morning. At 11:00 a.m. EDT on Friday the center of Hurricane Calvin was located at latitude 13.6°N and longitude 123.2°W which put it about 1080 miles (1740 km) southwest of the southern tip of Baja California. Calvin was moving toward the west at 16 m.p.h. (26 km/h). The maximum sustained wind speed was 120 m.p.h. (195 km/h) and there were wind gusts to 140 m.p.h. (220 km/h). The minimum surface pressure was 960 mb.

Hurricane Calvin rapidly intensified to a major hurricane over the Eastern North Pacific Ocean southwest of Baja California on Friday morning. A small circular eye with a diameter of 17 miles (28 km) formed at the center of Calvin’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 core of Hurricane Calvin. Storms near the core generated upper level divergence that pumped mass away from the hurricane.

The size of the circulation around Hurricane Calvin increased as Calvin rapidly intensified. Winds to hurricane force extended out 30 miles (50 km) from the center of Calvin’s circulation. Winds to tropical storm force extended out 115 miles (185 km) from the center. The Hurricane Intensity Index (HII) for Hurricane Calvin was 22.1. The Hurricane Size Index (HSI) was 10.3 and the Hurricane Wind Intensity Size Index (HWISI) was 32.4.

Hurricane Calvin will move through an environment that will be favorable for intensification during the next 12 hours. Calvin will move over water where the Sea Surface Temperatures are near 28˚C. It will move through a region where then upper level winds that are weak and there will be little vertical wind shear. Hurricane Calvin could intensify during the next 12 hours. Calvin will move over cooler water on Saturday. Hurricane Calvin is likely to weaken when it moves over the cooler water.

Hurricane Calvin will move around the southern part of a subtropical high pressure system over the Eastern North Pacific Ocean. The high pressure system will steer Calvin toward the west during the next several days. On its anticipated track, Hurricane Calvin will move toward the Central Pacific Ocean. Calvin could approach Hawaii on Tuesday. Calvin could still be a tropical storm when it approaches Hawaii.

Subtropical Storm Don Develops West of the Azores

Subtropical Storm Don developed west of the Azores on Friday morning. At 5:00 a.m. EDT on Friday the center of Subtropical Storm Don was located at latitude 32.9°N and longitude 46.8°W which put it about 1165 miles (1875 km) west-southwest of the Azores. Don was moving toward the north at 6 m.p.h. (10 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 1005 mb.

A large low pressure system over the central Atlantic Ocean west of the Azores exhibited more organization on Friday morning and the U.S. National Hurricane Center designated the system as Subtropical Storm Don. A distinct low level center of circulation was evident on visible satellite images. However, Subtropical storm Don was under an upper level trough. The bands near the center of Don consisted primarily of showers and lower clouds. Thunderstorms were occurring in a band that curled around the eastern and northern part of Don’s circulation. The strongest winds were occurring in that band of storms. Winds to tropical storm force extended out 200 miles (320 km) in the eastern side of Subtropical Storm Don. Winds in the western side of Don were blowing at less than tropical storm force.

Subtropical Storm Don will move through an environment only marginally favorable for intensification during the next 24 hours. Don will move over water where the Sea Surface Temperatures are near 26˚C. The upper level trough contains colder air, which will contribute to a more unstable atmosphere. However, the upper level trough will also limit the upper level divergence. There will be little vertical wind shear near the center of the upper level trough. Southerly in the eastern side of the trough will blow over the eastern side of Subtropical Storm Don. Those winds will cause more vertical wind shear in that area. The upper level trough could also circulate sinking, drier air around the western and southern sides of Don’s circulation. Subtropical Storm Don could maintain an equilibrium with its environment during the next 24 hours and its intensity may not change much.

The upper level trough will steer Subtropical Storm Don slowly toward the north during the next 24 hours. A high pressure system south of Greenland will block Don and prevent it from moving north on Sunday. Don is likely to move toward the east early next week. On its anticipated track, Subtropical Storm Don will meander west of the Azores during the next few days.

Calvin Intensifies to a Hurricane

Former Tropical Storm Calvin intensified to a hurricane on Thursday morning. At 11:00 a.m. EDT on Thursday the center of Hurricane Calvin was located at latitude 12.7°N and longitude 117.1°W which put it about 850 miles (1365 km) southwest of the southern tip of Baja California. Calvin was moving toward the west at 13 m.p.h. (20 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 993 mb.

Former Tropical Storm Calvin intensified rapidly to a hurricane during the past 30 hours. The inner end of rainband wrapped around the center of Hurricane Calvin’s circulation. An eye was beginning to appear at the center of circulation on satellite images. The eye was surrounded by a broken ring of thunderstorms. The strongest winds were occurring in the northeastern part of the ring of storms. Bands of showers and thunderstorms were revolving around the core of Hurricane Calvin. Storms near the core generated upper level divergence that pumped mass away from the hurricane.

The circulation around Hurricane Calvin was small. Winds to hurricane force extended out 25 miles (40 km) in the northeastern quadrant of Calvin’s circulation. Winds to tropical storm force extended out 70 miles (110 km) from the center of Hurricane Calvin.

Hurricane Calvin will move through an environment that will be favorable for intensification during the next 24 hours. Calvin will move over water where the Sea Surface Temperatures are near 28˚C. It will move through a region where then upper level winds that are weak and there will be little vertical wind shear. Hurricane Calvin will intensify during the next 24 hours. Calvin could intensify rapidly at times once the inner core is more fully formed.

Hurricane Calvin will move around the southern part of a subtropical high pressure system over the Eastern North Pacific Ocean. The high pressure system will steer Calvin toward the west during the next several days. On its anticipated track, Hurricane Calvin will move toward the Central Pacific Ocean. Calvin is likely to weaken when it moves over cooler water in the Central Pacific, but it could be east of Hawaii by early next week.

Tropical Storm Calvin Forms South of Baja California

Tropical Storm Calvin formed over the Eastern North Pacific Ocean south of Baja California on Wednesday morning. At 5:00 a.m. EDT on Wednesday the center of Tropical Storm Calvin was located at latitude 10.4°N and longitude 110.6°W which put it about 725 miles (1170 km) south of the southern tip of Baja California. Calvin was moving toward the west at 16 m.p.h. (26 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. (105 km/h). The minimum surface pressure was 1004 mb.

A low pressure system over the Eastern North Pacific Ocean south of Baja California strengthened on Wednesday morning and the U.S. National Hurricane Center designated the system as Tropical Storm Calvin. The distribution of thunderstorms in Tropical Storm Calvin was asymmetrical. Most thunderstorms were occurring in bands in the western side of Calvin’s circulation. Bands in the eastern side of Calvin consisted primarily of showers and lower clouds. The inner end of a rainband wrapped around the southern side of the center of Tropical Storm Calvin. Storms near the center generated upper level divergence that pumped mass away from the tropical storm. The circulation around Calvin was small. Winds to tropical storm force extended out 45 miles (75 km) from the center of Calvin’s circulation.

Tropical Storm Calvin will move through an environment that will be mostly favorable for intensification during the next 36 hours. Calvin will move over water where the Sea Surface Temperatures are near 28˚C. It will move under the southwestern part of an upper level ridge over Mexico and the southwestern U.S. The upper level ridge will produce easterly winds that will blow toward the top of Calvin’s circulation. Those winds will cause vertical wind shear. The wind shear will inhibit intensification, but the shear will not be enough to prevent Calvin from getting stronger. Tropical Storm Calvin will intensify during the next 36 hours. Calvin could strengthen to a hurricane by Friday.

Tropical Storm Calvin will move around the southern part of a subtropical high pressure system over the Eastern North Pacific Ocean. The high pressure system will Calvin toward the west during the next few days. On its anticipated track, Tropical Storm Calvin will move farther away from Mexico. Calvin could move over the Central Pacific Ocean early next week.

Tropical Storm Beatriz Moves Along West Coast of Mexico

Tropical Storm Beatriz was moving along the west coast of Mexico on Saturday morning. At 8:00 a.m. EDT on Saturday the center of Tropical Storm Beatriz was located at latitude 19.8°N and longitude 105.4°W which put it about 45 miles (75 km) south-southeast of Cabo Corrientes, Mexico. Beatriz was moving toward the northwest at 13 m.p.h. (20 km/h). The maximum sustained wind speed was 60 m.p.h. (75 km/h) and there were wind gusts to 75 m.p.h. (120 km/h). The minimum surface pressure was 1001 mb.

Tropical Storm Warnings were in effect for the portions of the coast from Manzanillo to Punta Mita, Mexico. A Tropical Storm Watch was in effect for the portion of the coast from Punta Mita to San Blas, Mexico. A Tropical Storm Watch was also in effect for Las Islas Marias.

The center of former Hurricane Beatriz made a landfall near Punta San Telmo, Mexico during Friday night. When the center of Beatriz made landfall, it significantly disrupted the inner core of Beatriz’ circulation. The disruption of the inner core caused Beatriz to weaken to a tropical storm. The distribution of thunderstorms in Tropical Storm Beatriz became asymmetrical after if made landfall. Most of the thunderstorms were occurring in bands in the western half of Beatriz’ circulation. Bands in the eastern part of the tropical storm consisted primarily of showers and lower clouds. Winds to tropical storm force extended out 80 miles (130 km) from the center of Tropical Storm Beatriz.

Former Hurricane Beatriz brought gusty winds and locally heavy rain to the west coast of Mexico from Punta San Telmo to Cabo Corrientes during Friday night. The heaviest rain fell along the coast in Michoacan, Colima and Jalisco.

Tropical Storm Beatriz will move through an environment that will be only marginally favorable for intensification during the next 36 hours. Beatriz will move over water where the Sea Surface Temperatures are near 28˚C. It will move under the southern part of an upper level ridge over northern Mexico. The upper level ridge will produce easterly winds that will blow toward the top of Beatriz’ circulation. Those winds will cause the wind shear to increase. Since Tropical Storm Beatriz is near the west coast of Mexico, it’s circulation will pull drier air into the eastern and northern parts of Beatriz. The drier air will inhibit the formation of thunderstorms in those parts of the circulation. Since the inner core of Tropical Storm Beatriz was disrupted when it moved over the coast, Beatriz is likely to continue to weaken during the next 36 hours.

The upper level ridge over northern Mexico will steer Tropical Storm Beatriz toward the northwest during the next 36 hours. On its anticipated track, Tropical Storm Beatriz will gradually move away from the west coast of Mexico. The gusty winds and locally heavy rain in Jalisco will gradually diminish on Saturday. Beatriz could move southeast of Baja California on Sunday.

Elsewhere over the Eastern North Pacific Ocean, Hurricane Adrian weakened south of Baja California. At 5:00 a.m. EDT on Saturday the center of Hurricane Adrian was located at latitude 18.1°N and longitude 114.0°W which put it about 425 miles (685 km) southwest of the southern tip of Baja California. Adrian was moving toward the west-northwest at 7 m.p.h. (11 km/h). The maximum sustained wind speed was 80 m.p.h. (130 km/h) and there were wind gusts to 95 m.p.h. (150 km/h). The minimum surface pressure was 983 mb.