Category Archives: Eastern and Central Pacific

TCs between Mexico and Hawaii

Genevieve Still a Tropical Storm

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Tropical Storm Genevieve was still a tropical storm on Saturday evening as it approached the Central Pacific Ocean.  At 11:00 p.m. EDT on Saturday the center of Tropical Storm Genevieve was located at latitude 23.5°N and longitude 136.0°W which put the center about 1655 miles (2665 km) west of southern tip of Baja California.  Genevieve was moving toward the west-northwest at 14 m.p.h. (22 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 1004 mb.

Tropical Storm Genevieve continued to weaken gradually on Saturday as it moved over cooler water.  Thunderstorms were still occurring in bands in the northern side of Genevieve’s circulation.  Bands in the southern side of Tropical Storm Genevieve consisted primarily of showers and lower clouds.  Storms near the center of Genevieve still generated some upper level divergence that pumped mass away to the north of the tropical storm.  The removal of mass in the upper levels was less than the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure increased gradually on Saturday.

The asymmetrical distribution of thunderstorms in Tropical Storm Genevieve caused the distribution of wind speeds also to be asymmetrical.  Winds to tropical storm force extended out 140 miles (220 km) in the northern half of Genevieve’s circulation.  Winds to tropical storm force only extended out 45 miles in the southern half of Tropical Storm Genevieve.

Tropical Storm Genevieve will move through an environment that will be unfavorable for intensification during the next 24 hours.  Genevieve will move over water where the Sea Surface Temperatures are near 23.5°C.  It will move under the eastern side of an upper level trough that is east of Hawaii.  The upper level trough will produce southwesterly winds that will blow toward the top of Genevieve’s circulation.  Those winds will cause the vertical wind shear to increase on Sunday.  Tropical Storm Genevieve will continue to weaken on Sunday because of the cooler water and more vertical wind shear.

Tropical Storm Genevieve will move around the southern part of a high pressure system that is over the Eastern North Pacific Ocean.  The high pressure system will steer Genevieve toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Genevieve will move over the Central North Pacific Ocean on Sunday.  Genevieve should stay well to the northeast of Hawaii.

Tropical Storm Genevieve Churns West of Baja California

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Tropical Storm Genevieve continued to churn over the Eastern North Pacific Ocean west of Baja California on Friday.  At 11:00 p.m. EDT on Friday the center of Tropical Storm Genevieve was located at latitude 22.6°N and longitude 131.4°W which put the center about 1370 miles (2200 km) west of southern tip of Baja California.  Genevieve was moving toward the west-northwest at 15 m.p.h. (24 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 1000 mb.

Tropical Storm Genevieve continued to weaken gradually on Friday as it moved over cooler water in the Eastern North Pacific Ocean west of Baja California.  Thunderstorms near the center of Genevieve’s circulation were not rising as high into the atmosphere.  Bands of showers and thunderstorms were still revolving around the center of Tropical Storm Genevieve.  Storms near the center of Genevieve generated less upper level divergence that pumped less mass away from the tropical Storm.  The removal of mass in the upper levels was less than the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure increased gradually on Friday.

Winds to tropical storm force extended out 105 miles (165 km) from the center of Tropical Storm Genevieve.

Tropical Storm Genevieve will move through an environment that will be unfavorable for intensification during the next 24 hours.  Genevieve will move over water where the Sea Surface Temperatures are near 24.5°C.  It will move through a region where the upper level winds are weak and there will be little vertical wind shear.  Tropical Storm Genevieve will continue to weaken gradually on Saturday as it moves over cooler water.

Tropical Storm Genevieve will move around the southern part of a high pressure system that is over the Eastern North Pacific Ocean.  The high pressure system will steer Genevieve toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Genevieve will continue to move farther away from Baja California.

Genevieve Weakens to a Tropical Storm

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Former Hurricane Genevieve weakened to a tropical storm on Thursday evening.  At 11:00 p.m. EDT on Thursday the center of Tropical Storm Genevieve was located at latitude 21.3°N and longitude 126.0°W which put the center about 1035 miles (1665 km) west of southern tip of Baja California.  Genevieve was moving toward the west-northwest at 15 m.p.h. (24 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 989 mb.

Former Hurricane Genevieve continued to weaken gradually on Thursday as it moved over cooler water in the Eastern North Pacific Ocean west of Baja California.  Thunderstorms were still occurring near the center of Genevieve’s circulation.  Bands of showers and thunderstorms were revolving around the center of Tropical Storm Genevieve.  Storms near the center of Genevieve still generated upper level divergence that pumped mass away from the hurricane.  However, the removal of mass in the upper levels was less than the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure continued to increase on Thursday.

Winds to tropical storm force extended out 125 miles (200 km) from the center of Tropical Storm Genevieve.

Tropical Storm Genevieve will move through an environment that will be unfavorable for intensification during the next 24 hours.  Genevieve will move over water where the Sea Surface Temperatures are near 24°C.  It will move through a region where the upper level winds are weak and there will be little vertical wind shear.  Tropical Storm Genevieve will continue to weaken on Friday as it moves over cooler water.

Tropical Storm Genevieve will move around the southwestern part of a high pressure system that is over the Southwest U.S.  The high pressure system will steer Genevieve toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Genevieve will continue to move farther away from Baja California.

Hurricane Genevieve Continues to Weaken

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Hurricane Genevieve continued to weaken as it moved over the Eastern North Pacific Ocean southwest of Baja California on Wednesday.  At 11:00 p.m. EDT on Wednesday the center of Hurricane Genevieve was located at latitude 19.6°N and longitude 120.8°W which put the center about 735 miles (1185 km) west-southwest of southern tip of Baja California.  Genevieve was moving toward the west-northwest 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 970 mb.

Hurricane Genevieve continued to weaken gradually on Wednesday as it moved over cooler water in the Eastern North Pacific Ocean southwest of Baja California.  An eye was no longer visible on satellite imagery, but thunderstorms were still occurring near the center of Genevieve’s circulation.  Bands of showers and thunderstorms were revolving around the center of Hurricane Genevieve.  Storms near the center of Genevieve still generated upper level divergence that pumped mass away from the hurricane.  However, the removal of mass in the upper levels was less than the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure increased on Wednesday.

The distribution of wind speeds around Hurricane Genevieve was fairly symmetrical.  Winds to hurricane force extended out 30 miles (50 km) from the center of Genevieve’s circulation.  Winds to tropical storm force extended out 140 miles (220 km) from the center of Hurricane Genevieve.

Hurricane Genevieve will move through an environment that will be unfavorable for intensification during the next 24 hours.  Genevieve will move over water where the Sea Surface Temperatures are near 25°C.  It will move through a region where the upper level winds are weak and there will be little vertical wind shear.  Hurricane Genevieve will continue to weaken on Thursday as it moves over cooler water.  Genevieve could weaken to a tropical storm by Friday.

Hurricane Genevieve will move around the southwestern part of a high pressure system that is over the Southwest U.S.  The high pressure system will steer Genevieve toward the west-northwest during the next 24 hours.  On its anticipated track, Hurricane Genevieve will move farther away from Baja California.

Tropical Storm Fausto Passes Northeast of Hawaii

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Tropical Storm Fausto was weakening as it passed northeast of Hawaii on Tuesday.  At 5:00 p.m. EDT on Tuesday the center of Tropical Storm Fausto was located at latitude 22.5°N and longitude 152.2°W which put the center about 270 miles (435 km) northeast of Hilo, Hawaii.  Fausto was moving toward the west-northwest at 12 m.p.h. (19 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.

Tropical Storm Fausto was weakening as it passed northeast of Hawaii on Tuesday afternoon.  An upper level trough that was located north of Hawaii was producing strong southwesterly winds that were blowing across the top of Fausto’s circulation.  Those winds were causing strong vertical wind shear.  The strong upper level winds were also blowing the tops off of many of the thunderstorms in Tropical Storm Fausto.

Thunderstorms were still occurring in bands in the eastern edge of Tropical Storm Fausto.  Bands in the other parts of Fausto’s circulation consisted primarily of showers and lower clouds.  There were no thunderstorms near the center of Fausto to generate upper level divergence to pump mass away from the tropical storm.  Convergence of mass in the lower levels of the atmosphere was causing the surface pressure to increase.

The strongest winds were blowing on the northern side of Tropical Storm Fausto.  Winds to tropical storm force extended out 140 miles (220 km) in the northern side of Fausto’s circulation.  Winds to tropical storm force only extended out 70 miles (110 km) in the southern side of Tropical Storm Fausto.

Tropical Storm Fausto will move through an environment that will be unfavorable for intensification during the next 24 hours.  Fausto will move over water where the Sea Surface Temperatures are near 26°C.  However, the upper level trough north of Hawaii will continue to cause strong vertical wind shear.  Tropical Storm Fausto will continue to weaken steadily during the next 24 hours.  Fausto is likely to weaken to a tropical depression on Wednesday.

Tropical Storm Fausto will move around the southern side of a high pressure system that is over the Central North Pacific Ocean.  The high pressure system will steer Fausto toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Fausto will continue to pass north of Hawaii on Wednesday.

Elsewhere, Hurricane Genevieve was weakening gradually as it moved southwest of Baja California.  At 5:00 p.m. EDT on Tuesday the center of Hurricane Genevieve was located at latitude 18.0°N and longitude 116.9°W which put the center about 565 miles (910 km) southwest of southern tip of Baja California.  Genevieve was moving toward the west-northwest at 9 m.p.h. (15 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 955 mb.

Hurricane Genevieve Intensifies to Cat. 5

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Hurricane Genevieve intensified to Category 5 on the Saffir-Simpson Scale on Sunday night as it moved over the Eastern North Pacific Ocean south of Baja California.  At 5:00 a.m. EDT on Monday the center of Hurricane Genevieve was located at latitude 15.5°N and longitude 112.2°W which put the center about 530 miles (855 km) south-southwest of southern tip of Baja California.  Genevieve was moving toward the northwest at 13 m.p.h. (21 km/h).  The maximum sustained wind speed was 160 m.p.h. (260 km/h) and there were wind gusts to 190 m.p.h. (305 km/h).  The minimum surface pressure was 925 mb.

Hurricane Genevieve intensified to Category 5 on Sunday night.  A circular eye with a diameter of 23 miles (37 km) was at the center of Genevieve’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 Genevieve’s circulation.  Storms near the core of Genevieve generated strong upper level divergence that pumped large amounts of mass away from the hurricane.  The removal of large amounts of mass caused the surface pressure to decrease rapidly.

The distribution of wind speeds in Hurricane Genevieve became more symmetrical on Sunday night.  Winds to hurricane force extended out 45 miles (75 km) from the center of Genevieve’s circulation.  Winds to tropical storm force extended out 195 miles (315 km) from the center of Hurricane Genevieve.

The Hurricane Intensity Index (HII) for Hurricane Genevieve was 35.0.  The Hurricane Size Index (HII) was 16.5 and the Hurricane Wind Intensity Size Index (HWISI) was 51.5.  Hurricane Genevieve was similar in size and intensity to Hurricane Michael when Michael hit Northwest Florida in 2018.

Hurricane Genevieve will move into an environment that will become slighyly less favorable for an intense hurricane during the next 24 hours.  Genevieve will move over water where the Sea Surface Temperatures are near 28°C.  It will move through a region where the upper level winds are weak and there will be little vertical wind shear.  However, Genevieve will start to move into a region where the air is a little drier later today.  Hurricane Genevieve is likely to start to weaken when it moves into the region of drier air.

Hurricane Genevieve will move around the southwestern part of a high pressure system that is over the Southwest U.S.  The high pressure system will steer Genevieve toward the northwest during the next 24 hours. On its anticipated track, Hurricane Genevieve will move parallel to the coast of Baja California.

Elsewhere, Hurricane Fausto continued to weaken slowly as it moved over the Central North Pacific Ocean east of Hawaii.  At 5:00 a.m. EDT on Monday the center of Hurricane Fausto was located at latitude 20.4°N and longitude 144.8°W which put the center about 670 miles (1080 km) east of Hilo, Hawaii.  Fausto was moving toward the west-northwes at 14 m.p.h. (24 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 988 mb.

Genevieve Rapidly Intensifies to a Major Hurricane

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Hurricane Genevieve rapidly intensified to a major hurricane over the Eastern North Pacific Ocean southwest of Mexico on Sunday morning.  At 11:00 a.m. EDT on Sunday the center of Hurricane Genevieve was located at latitude 13.4°N and longitude 109.4°W which put the center about 515 miles (825 km) southwest of Manzanillo, Mexico.  Genevieve was moving toward the west-northwest 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 963 mb.

A circular eye with a diameter of 20 miles (32 km) formed at the center of Hurricane Genevieve.  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 Genevieve’s circulation.  Storms near the core of Genevieve generated strong upper level divergence that pumped large amounts of mass away from the hurricane.  The removal of large amounts of mass caused the surface pressure to decrease rapidly.

Winds to hurricane force extended out 45 miles (75 km) in the northern side of Hurricane Genevieve.  Winds to hurricane force extended out 15 miles (25 km) in the southern side of Genevieve’s circulation.  Winds to tropical storm force extended out 195 miles (315 km) from the center of Hurricane Genevieve.

Hurricane Genevieve will move through an environment favorable for intensification during the next 24 hours.  Genevieve 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.  Hurricane Genevieve will intensify during the next 24 hours.  Genevieve could continue to intensify rapidly during the next few hours.   Hurricane Genevieve could strengthen to a Category 5 hurricane on the Saffir-Simpson Scale.

Hurricane Genevieve will move around the southwestern part of a high pressure system that is over the Southwest U.S.  The high pressure system will steer Genevieve toward the northwest during the next 24 hours.  On its anticipated track, Hurricane Genevieve will move parallel to the west coast of Mexico.

Elsewhere, Hurricane Fausto was weakening slowly as it moved over the Central North Pacific Ocean.  At 11:00 a.m. EDT on Sunday the center of Hurricane Fausto was located at latitude 19.9°N and longitude 141.1°W which put the center about 910 miles (1465 km) east of Hilo, Hawaii.  Fausto was moving toward the west at 14 m.p.h. (24 km/h).  The maximum sustained wind speed was 85 m.p.h. (135 km/h) and there were wind gusts to 100 m.p.h. (160 km/h).  The minimum surface pressure was 977 mb.

Genevieve Strengthens to a Hurricane

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Former Tropical Storm Genevieve strengthened to a hurricane over the Eastern North Pacific Ocean southwest of Mexico on Saturday.  At 11:00 p.m. EDT on Saturday the center of Hurricane Genevieve was located at latitude 12.1°N and longitude 106.7°W which put the center about 500 miles (810 km) south-southwest of Manzanillo, Mexico.  Genevieve was moving toward the west-northwest at 15 m.p.h. (24 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 987 mb.

Former Tropical Storm Genevieve strengthened to a hurricane on Saturday.  The inner end of a rainband wrapped around the eastern and northern sides of the center of Genevieve’s circulation.  An eye appeared to be forming at the center of Hurricane Genevieve.  Bands of showers and thunderstorms were revolving around the center of Genevieve’s circulation.  Storms near the center of Genevieve generated upper level divergence that pumped mass away from the hurricane.  The removal of mass caused the surface pressure to decrease.

The strongest winds were occurring in the section of the rainband that wrapped around the northeastern part of the center of Hurricane Genevieve.  Winds to hurricane force extended out 20 miles in the northeastern quadrant of Genevieve’s circulation.  Winds to tropical storm force extended out 125 miles (200 km) from the center of Hurricane Genevieve.

Hurricane Genevieve will move through an environment favorable for intensification during the next 24 hours.  Genevieve 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.  Hurricane Genevieve will intensify during the next 24 hours.  Genevieve could intensify rapidly at times.  Genevieve is likely to strengthen to a major hurricane by early next week.

Hurricane Genevieve will move around the southwestern part of a high pressure system that is over the Southwest U.S.  The high pressure system will steer Genevieve toward the northwest during the next 24 hours.  On its anticipated track, Hurricane Genevieve will move parallel to the west coast of Mexico.

Elsewhere, Hurricane Fausto was nearing the Central Pacific Ocean.  At 11:00 p.m. EDT on Saturday the center of Hurricane Fausto was located at latitude 19.5°N and longitude 138.8°W which put the center about 1060 miles (1702 km) east of Hilo, Hawaii.  Fausto was moving toward the west at 13 m.p.h. (21 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 971 mb.

 

Hurricane Fausto Strengthens a Little More

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Hurricane Fausto strengthened a little more on Friday morning as it moved toward the Central Pacific Ocean.  At 11:00 a.m. EDT on Friday the center of Hurricane Fausto was located at latitude 18.6°N and longitude 131.2°W which put the center about 1560 miles (2510 km) east of Hilo, Hawaii.  Fausto was moving toward the west at 16 m.p.h. (26 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 967 mb.

Hurricane Fausto continued to strengthen early on Friday.  A circular eye with a diameter of 17 miles (28 km) was at the center of Fausto’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 center of Fausto’ circulation.  Storms near the center of Fausto generated more upper level divergence that pumped more mass away from the hurricane.  The removal of more mass caused the surface pressure to decrease.

The distribution of wind speeds around Hurricane Fausto became more symmetrical on Friday.  Winds to hurricane force extended out 45 miles (75 km) from the center of Fausto’s circulation.  Winds to tropical storm force extended out 185 miles (295 km) from the center of Hurricane Fausto.

Hurricane Fausto will move into an environment that will become unfavorable for intensification during the next 24 hours.  Fausto will move over water where the Sea Surface Temperatures are near 26°C.  It will move under the middle of an upper level ridge that is southwest of Mexico.  The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear.  There is drier air just to the north and west of Hurricane Fausto.  The drier air is likely to inhibit the development of new thunderstorms in bands in the northern and western parts of Fausto’s circulation.  Hurricane Fausto is likely to weaken during the next 24 hours because of the effects of the drier air.

Hurricane Fausto will move around the southern part of a high pressure system that is over the Eastern North Pacific Ocean.  The high pressure system will steer Fausto toward the west during the next 24 hours.  On its anticipated track, Hurricane Fausto will continue to move toward the Central Pacific Ocean.  Fausto could be near the Hawaiian Islands by the middle of next week.

Elsewhere over the Eastern North Pacific Ocean, Tropical Depression Seven-E formed south of Mexico.  At 11:00 a.m. EDT on Friday the center of Tropical Depression Seven-E was located at latitude 9.0°N and longitude 100.5°W which put the center about 605 miles (975 km) south of Zihuatanejo, Mexico.  The tropical depression was moving toward the west-northwest at 12 m.p.h. (19 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 1005 mb.

Hurricane Fausto Strengthens

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Hurricane Fausto strengthened on Thursday as it moved toward the Central Pacific Ocean.  At 11:00 p.m. EDT on Thursday the center of Hurricane Fausto was located at latitude 18.3°N and longitude 128.4°W which put the center about 1745 miles (2805 km) east of Hilo, Hawaii.  Fausto was moving toward the west at 15 m.p.h. (24 km/h).  The maximum sustained wind speed was 90 m.p.h. (145 km/h) and there were wind gusts to 105 m.p.h. (150 km/h).  The minimum surface pressure was 976 mb.

Hurricane Fausto strengthened on Thursday.  A small circular eye formed at the center of Fausto’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 center of Hurricane Fausto.  Storms near the center of Fausto generated more upper level divergence that pumped more mass away from the hurricane.  The removal of more mass caused the surface pressure to decrease on Thursday.

The size of the circulation around Hurricane Fausto increased on Thursday.  Winds to hurricane force extended out 45 miles (75 km) in the northern side of Fausto’s circulation.  Winds to tropical storm force extended out 185 miles (295 km) in the northern half of Hurricane Fausto.  Winds to tropical storm force extended out 115 miles (185 km) in the southern half of Fausto’s circulation.

Hurricane Fausto will move through an environment that will be somewhat favorable for intensification during the next 24 hours.  Fausto will move over water where the Sea Surface Temperatures are near 27°C.  It will move under the middle of an upper level ridge that is southwest of Mexico.  The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear.  There is drier air just to the north and west of Hurricane Fausto.  The drier air could inhibit the development of thunderstorms in bands in the northern and western parts of Fausto’s circulation.  Hurricane Fausto could intensify a little more on Friday if the drier air does not prevent the formation of new thunderstorms.

Hurricane Fausto will move around the southern part of a high pressure system that is over the Eastern North Pacific Ocean.  The high pressure system will steer Fausto toward the west during the next 24 hours.  On its anticipated track, Hurricane Fausto will continue to move toward the Central Pacific Ocean.