Monthly Archives: September 2022

Tropical Storm Nanmadol Brings Wind and Rain to Japan

Tropical Storm Nanmadol brought wind and rain to Japan on Sunday. At 11:00 p.m. EDT on Sunday the center of Tropical Storm Nanmadol was located at latitude 34.5°N and longitude 131.9°E which put it about 30 miles (50 km) west of Hiroshima, Japan. Nanmadol was moving toward the north-northeast at 13 m.p.h. (20 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 976 mb.

Former Typhoon Nanmadol weakened to a strong tropical storm as it moved inland over Kyushu on Sunday. The circulation around Tropical Storm Nanmadol was still large. Winds to tropical storm force extended out 275 miles (445 km) from the center of Nanmadol. The strongest winds and heaviest rain were occurring in band in the eastern and northern parts of Nanmadol. Bands in the southern and western parts of Tropical Storm Nanmadol consisted primarily of showers and lower clouds.

The eye of then Typhoon Nanmadol moved over Kagoshima earlier on Sunday. A weather station in Kagoshima measured a surface pressure of 940.8 mb. The same weather station also measured 7.10 inches (180 mm) of rain. Heavy rain fell over many other locations in Kyushu and there were reports of flash floods in some locations.

An upper level trough northwest of Japan will steer Tropical Storm Nanmadol quickly toward the northeast during the next 36 hours. On its anticipated track Tropical Storm Nanmadol will move over much of Honshu. Nanmadol will bring gusty winds and locally heavy rain to Shikoku and Honshu. Heavy rain could cause flash floods in some locations.

Tropical Storm Madeline Spins West of Mexico

Tropical Storm Madeline continued to spin over the Eastern North Pacific Ocean west of Mexico on Sunday evening. At 8:00 p.m. EDT on Sunday the center of Tropical Storm Madeline was located at latitude 19.0°N and longitude 107.6°W which put it about 310 miles (500 km) south-southeast of the southern tip of Baja California. Madeline was moving toward the north-northwest at 8 m.p.h. (13km/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 999 mb.

A Tropical Storm Watch was in effect for the portion of the coast from Manzanillo to Cabo Corrientes, Mexico.

Satellite images of Tropical Storm Madeline on Sunday evening gave indications that Madelline might be getting more organized. More thunderstorms developed near the center of Madeline’s circulation. Other thunderstorms were occurring in bands in the western side of Tropical Storm Madeline and on the far eastern side of the circulation. The new thunderstorms near the center of circulation began to generate upper level divergence that pumped mass away from the tropical storm. Winds to tropical storm force extended out 130 miles (210 km) from the center of Madeline.

Tropical Storm Madeline will move through an environment somewhat favorable for intensification during the next 24 hours. Madeline will move over water where the Sea Surface Temperatures are near 27˚C. It will move under the southern part of an upper level ridge centered near the west coast of Mexico. The ridge will produce easterly winds that will blow toward the top of Madeline’s circulation. Those winds will cause some vertical wind shear. The wind shear will inhibit intensification, but the shear may not be strong enough to prevent it. Tropical Storm Madeline could intensify during the next 24 hours.

Tropical Storm Madeline will move around the western end of a high pressure system over Mexico. The high pressure system will steer Madeline toward the northwest during the next 24 hours. On its anticipated track Tropical Storm Madeline could be south of Baja California on Monday evening.

Fiona Intensifies to a Hurricane South of Puerto Rico

Former Tropical Storm Fiona intensified to a hurricane south of Puerto Rico on Sunday morning. At 11:00 a.m. EDT on Sunday the center of Hurricane Fiona was located at latitude 17.3°N and longitude 66.5°W which put it about 50 miles (80 km) south of Ponce, Puerto Rico. Fiona was moving toward the west-northwest at 8 m.p.h. (13 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. (145 km/h). The minimum surface pressure was 987 mb.

A Hurricane Warning was in effect for Puerto Rico, Culebra and Vieques. A Hurricane Warning was also in effect for the portion of the coast from Cabo Caucedo to Cabo Frances Viejo, Domincan Republic. A Hurricane Watch was also in effect for the portion of the coast from Cabo Frances Viejo to Puerto Plata, Dominican Republic. Tropical Storm Warnings were in effect for the U.S. Virgin Islands, the British Virgin Islands, and the portion of the coast from Cabo Frances Viejo to Puerto Plata, Dominican Republic. A Tropical Storm Watch was in effect for the portion of the coast from Cabo Caucedo to Barahona, Dominican Republic. Tropical Storm Watches were in effect for the Turks and Caicos, and for the Southeastern Bahamas including the Acklins, Crooked Island, Long Cay, the Inaguas, Mayaguana and the Ragged Islands.

Former Tropical Storm Fiona strengthened to a hurricane over the Caribbean Sea south of Puerto Rico. The inner end of a rainband wrapped around the northern side of the center of Hurricane Fiona. A partial eyewall surrounded the northern half of the center of Fiona’s circulation. The partial eyewall was over Ponce, Puerto Rico. Bands of showers and thunderstorms were revolving around the core of Hurricane Fiona. Storms near the core generated upper level divergence that pumped mass away from the hurricane. Winds to hurricane force extended out 30 miles (50 km) in the northeastern quadrant of Fiona’s circulation. Winds to tropical storm force extended out 140 miles (220 km) from the center of circulation.

Hurricane Fiona will move through an environment mostly favorable for intensification during the next 36 hours. Fiona will move over water where the Sea Surface Temperatures are near 29˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. The center of Hurricane Fiona could pass over southwestern Puerto Rico during the next few hours. Fiona will move near the eastern part of the Dominican Republic on Monday. Since some of the circulation around Hurricane Fiona will pass over land during the next 36 hours, that could cause Fiona to weaken when the center is over or near land.

Hurricane Fiona will move around the western side of a subtropical high pressure system over the Atlantic Ocean. The high pressure system will steer Fiona toward the northwest during the next 24 hours. On its anticipated track the center of Hurricane Fiona will be near the southwestern part of Puerto Rico by Sunday evening. Bands in the eastern and northern sides of Fiona’s circulation will bring strong winds and locally heavy rain to Puerto Rico, the U.S. Virgin Islands and the British Virgin Islands on Sunday. Hurricane Fiona could begin to affect the eastern part of the Dominican Republic during Sunday night.

Typhoon Nanmadol Brings Strong Wind and Heavy Rain to Kyushu

Typhoon Nanmadol brought strong winds and heavy rain to Kyushu on Sunday morning. At 5:00 a.m. EDT on Sunday the center of Typhoon Nanmadol was located at latitude 31.1°N and longitude 130.6°E which put it about 40 miles (65 km) south of Kagoshima, Japan. Nanmadol was moving toward the north-northwest at 12 m.p.h. (19 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 969 mb.

The center of Typhoon Nanmadol was moving inland over Kyushu on Sunday morning. Nanmadol was a large an powerful typhoon. Winds to typhoon force extended out 75 miles (120 km) from the center of Nanmadol. Winds to tropical storm force extended out 250 miles (400 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Nanmadol was 19.2. The Hurricane Size Index (HSI) was 30.2 and the Hurricane Wind Intensity Size Index (HWISI) was 51.1. Typhoon Nanmadol was capable of causing extensive serious damage.

Typhoon Nanmadol will move around the western end of a high pressure system over the Western North Pacific Ocean during the next 12 hours. The high pressure system will steer Nanmadol toward the north during that time. On its anticipated track the center of Typhoon Nanmadol will continue to move farther inland over Kyushu. Nanmadol will continue to produce strong gusty winds and locally heavy rain to Kyushu. Heavy rain is likely to cause flash floods in some locations. The westerly winds in the middle latitudes will Nanmadol toward the northeast later today. Typhoon Nanmadol will move over Honshu tomorrow. Nanmadol will bring strong winds and heavy rain to much of Honshu and Shikoku, when it moves northeastward.

Tropical Storm Fiona Moves Closer to Puerto Rico

Tropical Storm Fiona moved closer to Puerto Rico on Saturday night. At 11:00 p.m. EDT on Saturday the center of Tropical Storm Fiona was located at latitude 16.6°N and longitude 64.9°W which put it about 75 miles (120 km) south of St. Croix. Fiona was moving toward the west-northwest at 8 m.p.h. (13 km/h). The maximum sustained wind speed was 60 m.p.h. (95 km/h) and there were wind gusts to 75 m.p.h. (120 km/h). The minimum surface pressure was 997 mb.

A Hurricane Warning was in effect for Puerto Rico, Culebra and Vieques. A Hurricane Warning was also in effect for the portion of the coast from Cabo Caucedo to Cabo Frances Viejo, Domincan Republic. A Hurricane Watch was in effect for the U.S. Virgin Islands. A Hurricane Watch was also in effect for the portion of the coast from Cabo Frances Viejo to Puerto Plata, Dominican Republic. Tropical Storm Warnings were in effect for the U.S. Virgin Islands, the British Virgin Islands, and the portion of the coast from Cabo Frances Viejo to Puerto Plata, Dominican Republic. A Tropical Storm Watch was in effect for the portion of the coast from Cabo Caucedo to Barahona, Dominican Republic.

Tropical Storm Fiona was gradually getting better organized on Saturday night. The inner end of a rainband wrapped around the northern side of the center of circulation. Radar on Puerto Rico showed that an eye could be forming at the center of Fiona’s circulation. Storms near the center generated more upper level divergence that pumped mass away from the tropical storm. The removal of mass was allowing the surface pressure to slowly decrease. Winds to tropical storm force extended out 140 miles (220 km) from the center of Tropical Storm Fiona.

Tropical Storm Fiona will move through an environment somewhat favorable for intensification during the next 24 hours. Fiona will move over water where the Sea Surface Temperatures are near 29˚C. An upper level ridge over the tropical Atlantic Ocean will produce southwesterly winds that will blow toward the top of Tropical Storm Fiona. Those winds will cause some vertical wind shear. The wind shear will inhibit intensification. Tropical Storm Fiona could continue to strengthen gradually, but the wind shear will likely limit intensification during the next 24 hours.

Tropical Storm Fiona will move around the southwestern side of the subtropical high pressure system over the Atlantic Ocean. The high pressure system will steer Fiona toward the west-northwest during the next 24 hours. On its anticipated track the center of Tropical Storm Fiona will be near the southwestern part of Puerto Rico by Sunday evening. Bands in the eastern and northern sides of Fiona’s circulation will bring gusty winds and locally heavy rain to Puerto Rico, the U.S. Virgin Islands and the British Virgin Islands on Sunday. Fiona could begin to affect the eastern part of the Dominican Republic during Sunday night.

Typhoon Nanmadol Near Yakushima

The center of Typhoon Nanmadol was near Yakushima on Saturday night. At 11:00 p.m. EDT on Saturday the center of Typhoon Nanmadol was located at latitude 30.2°N and longitude 130.8°E which put it about 90 miles (145 km) south of Kagoshima, Japan. Nanmadol was moving toward the north-northwest at 14 m.p.h. (22 km/h). The maximum sustained wind speed was 120 m.p.h. (195 km/h) and there were wind gusts to 150 m.p.h. (240 km/h). The minimum surface pressure was 951 mb.

The eye of Typhoon Nanmadol was just southeast of Yakushima on Saturday night. The northwestern part of the eyewall was over Yakushima. Bands on the northern side of Typhoon Nanmadol were producing gusty winds and locally heavy rain over Kyushu.

Nanmadol was a large typhoon. Winds to typhoon force extended out 70 miles (110 km) from the center of Typhoon Nanmadol. Winds to tropical storm force extended out 275 miles (445 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Nanmadol was 22.1. The Hurricane Size Index (HSI) was 29.0 and the Hurricane Wind Intensity Size Index (HWISI) was 51.1. Typhoon Nanmadol was capable of causing widespread serious damage.

Typhoon Nanmadol will move around the western end of a high pressure system over the Western North Pacific Ocean during the next 24 hours. The high pressure system will steer Nanmadol toward the north during the next 24 hours. On its anticipated track the center of Typhoon Nanmadol will reach southwestern Kyushu in a few hours. Nanmadol will bring strong gusty winds and locally heavy rain to Kyushu. Heavy rain is likely to cause flash floods in some locations. The westerly winds in the middle latitudes will Nanmadol toward the northeast in a day or so. Typhoon Nanmadol will move over Honshu early next week. Nanmadol will bring strong winds and heavy rain to Honshu and Shikoku.

Tropical Storm Madeline Forms Southwest of Mexico

Tropical Storm Madeline formed over the Eastern North Pacific Ocean southwest of Mexico on Saturday afternoon. At 5:00 p.m. EDT on Saturday the center of Tropical Storm Madeline was located at latitude 15.9°N and longitude 106.9°W which put it about 520 miles (840 km) south-southeast of the southern tip of Baja California. Madeline was moving toward the north at 1 m.p.h. (2 km/h). The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (95 km/h). The minimum surface pressure was 1000 mb.

The circulation around a low pressure system over the Eastern North Pacific Ocean southwest of Mexico strengthened on Saturday afternoon and the National Hurricane Center designated the system as Tropical Storm Madeline. The circulation around Tropical Storm Madeline was still organizing on Saturday afternoon. A distinct low level center of circulation was evident on visible satellite images. However, the bands close to the center consisted primarily of showers and lower clouds. Thunderstorms were occurring in bands in the eastern and western edges of Madeline’s circulation. Winds to tropical storm force extended out 125 miles (200 km) in the southern side of Tropical Storm Madeline. The winds in the northern side of Madeline were blowing at less than tropical storm force.

Tropical Storm Madeline will move through an environment somewhat favorable for intensification during the next 36 hours. Madeline will move over water where the Sea Surface Temperatures are near 28˚C. It will move under the western part of an upper level ridge over Mexico. The ridge will produce southerly winds that will blow toward the top of Madeline’s circulation. Those winds will cause some vertical wind shear. The wind shear will inhibit intensification, but the shear may not be strong enough to prevent it. Tropical Storm Madeline could intensify gradually during the next 36 hours.

Tropical Storm Madeline will move around the western end of a high pressure system over Mexico. The high pressure system will steer Madeline toward the north-northwest during the next 36 hours. On its anticipated track Tropical Storm Madeline could be south of Baja California on Monday morning.

Tropical Depression Lester Brings Rain to Southern Mexico

Tropical Depression Lester brought rain to southern Mexico on Saturday afternoon. At 2:00 p.m. EDT on Saturday the center of Tropical Depression Lester was located at latitude 16.5°N and longitude 98.5°W which put it about 85 miles (135 km) east-southeast of Acapulco, Mexico. Lester was moving toward the north 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 1009 mb.

Former Tropical Storm Lester quickly weakened to a tropical depression after the center made landfall on the coast of Mexico east of Acapulco. The government of Mexico discontinued the tropical storm warnings and watches for the coast. Tropical Depression Lester is forecast to dissipate quickly as it moves farther inland over Mexico. Even though Lester will weaken quickly, bands in the eastern side of Lester’s circulation will drop locally heavy rain over parts of Guerrero and Oaxaca. Heavy rain could cause flash floods in some locations.

Tropical Storm Fiona Brings Wind and Rain to the Leeward Islands

Tropical Storm Fiona brought wind and rain to the Leeward Islands on Friday night. At 11:00 p.m. EDT on Friday the center of Tropical Storm Fiona was located at latitude 16.6°N and longitude 62.2°W which put it about 55 miles (90 km) west-northwest of Guadeloupe. Fiona was moving toward the west at 14 m.p.h. (22 km/h). The maximum sustained wind speed was 60 m.p.h. (95 km/h) and there were wind gusts to 75 m.p.h. (120 km/h). The minimum surface pressure was 1002 mb.

Tropical Storm Warnings were in effect for Saba, St. Eustatius, St. Maarten, Antigua, Barbuda, St. Kitts, Nevis, Montserrat, Anguilla, Guadeloupe, St. Martin and St. Barthelemy, Puerto Rico, Culebra, Vieques, the U.S. Virgin Islands, the British Virgin Islands and the portion of the coast from Cabo Caucedo to Puerto Plata, Dominican Republic. Tropical Storm Watches were in effect for Dominica and for the portion of the coast from Cabo Caucedo to Barahona, Dominican Republic.

More thunderstorms developed near the center of Tropical Storm Fiona on Friday night which caused Fiona to strengthen. Although there were more thunderstorms near the center of circulation, most of the thunderstorms were still occurring in bands on the eastern side of Tropical Storm Fiona. Bands in the western half of the circulation consisted primarily of showers and lower clouds. The new thunderstorms near the center of Fiona generated upper level divergence that pumped mass away to the north and east of the tropical storm. Winds to tropical storm force extended out 140 miles (220 km) from the center of Tropical Storm Fiona.

Tropical Storm Fiona will move through an environment somewhat favorable for intensification during the next 24 hours. Fiona will move over water where the Sea Surface Temperatures are near 29˚C. An upper level ridge over the tropical Atlantic Ocean will produce southwesterly winds that will blow toward the top of Tropical Storm Fiona. Those winds will cause vertical wind shear. The wind shear will inhibit intensification. Tropical Storm Fiona could continue to strengthen gradually, but the wind shear will limit intensification during the next 24 hours.

Tropical Storm Fiona will move around the southern side of the subtropical high pressure system over the Atlantic Ocean. The high pressure system will steer Fiona toward the west-northwest during the next 36 hours. Tropical Storm Fiona will continue to cause gusty winds and locally heavy rain to the northern Leeward Islands during the next 12 hours. Heavy rain could cause flash floods in some locations. On its anticipated track Tropical Storm Fiona could be southeast of Puerto Rico by Saturday evening. Fiona could be near the eastern end of the Dominican Republic by Sunday evening. There is a chance that Fiona could be a hurricane by that time.

Powerful Typhoon Nanmadol Is East of Okinawa

Powerful Typhoon Nanamadol was east of Okinawa on Friday night. At 11:00 p.m. EDT on Friday the center of Typhoon Nanmadol was located at latitude 26.4°N and longitude 132.7°E which put it about 330 miles (530 km) east of Okinawa. Nanmadol was moving toward the northwest at 9 m.p.h. (15 km/h). The maximum sustained wind speed was 150 m.p.h. (240 km/h) and there were wind gusts to 185 m.p.h. (295 km/h). The minimum surface pressure was 926 mb.

Powerful Typhoon Nanmadol was churning over the Western North Pacific Ocean east of Okinawa on Friday night. A circular eye with a diameter of 23 miles (37 km) was present at the center of Nanmadol. The eye was surrounded by a ring of strong thunderstorms and the strongest winds were occurring in that ring of storms. Bands of showers and thunderstorms were revolving around the core of Typhoon Nanmadol. Storms near the core generated upper level divergence that pumped mass away from the typhoon in all directions.

The size of the circulation around Typhoon Nanmadol increased on Friday when Nanmadol intensified. Winds to typhoon force extended out 100 miles (160 km) from the center of Nanmadol. Winds to tropical storm force extended out 260 miles (420 km) from the center of circulation. The Hurricane Intensity Index (HII) for Typhoon Nanmadol was 31.6. The Hurricane Size Index (HSI) was 28.0 and the Hurricane Wind Intensity Size Index (HWISI) was 59.6. Typhoon Nanmadol was capable of causing widespread severe damage.

Typhoon Nanmadol will move through an environment capable of supporting a powerful typhoon during the next 24 hours. Nanmadol will move over water where the Sea Surface Temperatures are near 29˚C. It will move through a region where the upper level winds are weak and there will be little vertical wind shear. Typhoon Nanmadol could maintain much of its intensity during the next 24 hours. If the inner end of a rainband wraps around the existing eye and eyewall, then concentric eyewalls could form. That would be the start of an eyewall replacement cycle that would cause Nanmadol to weaken.

Typhoon Nanmadol will move around the southwestern part of a high pressure system over the Western North Pacific Ocean. The high pressure system will steer Nanmadol toward the northwest during the next 24 hours. On its anticipated track the center of Typhoon Nanmadol will be east of Minami Daito Jima within 12 hours. Nanmadol could be east of Amami Oshima in 24 hours. Typhoon Nanmadol will bring strong, gusty winds and heavy rain to parts of the northern Ryukyu Islands during the weekend. Nanmadol could be near western Kyushu in 36 hours.