Category Archives: Eastern and Central Pacific

TCs between Mexico and Hawaii

Tropical Depression 12E Forms Near Mexico’s West Coast

Tropical Depression Twelve-E formed over the Eastern North Pacific Ocean near the west coast of Mexico on Monday evening.  At 11:00 p.m. EDT on Monday the center of Tropical Depression Twelve-E was located at latitude 17.2°N and longitude 105.4°W which put the center about 145 miles (230 km) south-southwest of Manzanillo, Mexico.  Tropical Depression Twelve-E was moving toward the west-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 1007 mb.

A low pressure system over the Eastern North Pacific Ocean strengthened on Monday evening and the U.S. National Hurricane Center designated the system as Tropical Depression Twelve-E.

The circulation around Tropical Depression Twelve-E exhibited more organization on Monday evening.  More thunderstorms formed near the center of the tropical depression.  More thunderstorms also developed in bands revolving around the center of Tropical Depression Twelve-E.  Storms near the center of circulation began to generate upper level divergence that pumped mass away from the tropical depression.

Tropical Depression Twelve-E will move through an environment favorable for intensification during the next 24 hours.  The tropical depression will move over water where the Sea Surface Temperatures are near 30°C.  It will move under the southern part of an upper level ridge over Mexico.  The upper level ridge will produce easterly winds that will blow toward the top of the tropical depression.  The winds in the lower levels of the atmosphere will also blow from the east.  So, there will be little vertical wind shear.  Tropical Depression Twelve-E will intensify to a tropical storm on Tuesday.

Tropical Depression Twelve-E will move around the western end of a high pressure system over Mexico.  The high pressure system will steer the tropical depression toward the northwest during the next 24 hours.  On its anticipated track, Tropical Depression Twelve-E will move toward Baja California.

Elsewhere over the Eastern North Pacific Ocean, Tropical Storm Kiko intensified on Monday.  At 11:00 p.m. EDT on Monday the center of Tropical Storm Kiko was located at latitude 13.8°N and longitude 127.3°W which put the center about 1880 miles (3025 km) east Hilo Hawaii.  Kiko was moving toward the west at 7 m.p.h. (11 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 993 mb.

Tropical Storm Kiko Forms Over the Eastern North Pacific

Tropical Storm Kiko formed over the Eastern North Pacific Ocean between Mexico and Hawaii on Sunday.  At 11:00 a.m. EDT on Sunday the center of Tropical Storm Kiko was located at latitude 14.4°N and longitude 123.1°W which put the center about 1045 miles (1680 km) west-southwest of the southern tip of Baja California.  Kiko was moving toward the west 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 1007 mb.

A low pressure system over the Eastern North Pacific Ocean between Mexico and Hawaii strengthened on Sunday morning and the U.S. National Hurricane Center designated the system as Tropical Storm Kiko.

Tropical Storm Kiko exhibited more organization on Sunday morning.  More thunderstorms formed near the center of Kiko’s circulation.  More thunderstorms also developed in bands in the western side of Tropical Storm Kiko.  Bands in the eastern side of Kiko’s circulation consisted primarily of showers and lower clouds.  Storms near the center of Kiko began to generate upper level divergence that pumped mass away to the west of the tropical storm.

The circulation around Tropical Storm Kiko was small.  Winds to tropical storm force extended out 35 miles in the northern side of Kiko’s circulation.  The winds in the southern side of Tropical Storm Kiko were blowing at less than tropical storm force.

Tropical Storm Kiko will move through an environment favorable for intensification.  Kiko 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 over the Eastern North Pacific Ocean.  The upper level ridge will produce easterly winds that will blow toward the top of Kiko’s circulation.  Those winds will cause some vertical wind shear, but the wind shear will not be enough to prevent intensification.  Tropical Storm Kiko will intensify during the next 24 hours.  Kiko could strengthen to a hurricane in a couple of days.

Tropical Storm Kiko will move around the southern side of a subtropical high pressure system over the Eastern North Pacific Ocean.  The high pressure system will steer Kiko toward the west during the next 24 hours.  On its anticipated track, Tropical Storm Kiko will move toward the Central Pacific Ocean.

Tropical Storm Juliette Weakens

Tropical Storm Juliette weakened as it moved west of Baja California on Wednesday.  At 5:00 p.m. EDT on Wednesday the center of Tropical Storm Juliette was located at latitude 23.9°N and longitude 120.2°W which put the center about 655 miles (1055 km) west of the southern tip of Baja California.  Juliette was moving toward the north-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 1006 mb.

A combination of cooler water and stronger vertical wind shear caused Tropical Storm Juliette to weaken on Wednesday.  Thunderstorms were still occurring in bands in the northeastern part of Juliette’s circulation.  Bands in the other parts of Tropical Storm Juliette consisted primarily of showers and lower clouds.

The circulation around Tropical Storm Juliette was small.  Winds to tropical storm force extended out 45 miles (75 km) from the center of Juliette’s circulation.

Tropical Storm Juliette will move through an environment that will be unfavorable for intensification during the next 24 hours.  Juliette will move over water where the Sea Surface Temperatures are near 22°C.  It will move under the eastern part of an upper level trough that is west of Baja California.  The upper level trough will produce southwesterly winds that will blow toward the top of Juliette’s circulation.  Those winds will cause strong vertical wind shear.  The combination of cool Sea Surface Temperatures and strong vertical wind shear will cause Tropical Storm Juliette to continue to weaken during the next 24 hours.

The upper level trough west of Baja California will steer Tropical Storm Juliette toward the north during the next 24 hours.  On its anticipated track, Tropical Storm Juliette will remain far to the west of Baja California.

Tropical Storm Juliette Moves Southwest of Baja California

Tropical Storm Juliette moved southwest of Baja California on Tuesday.  At 5:00 p.m. EDT on Tuesday the center of Tropical Storm Juliette was located at latitude 19.9°N and longitude 117.2°W which put the center about 515 miles (825 km) west-southwest of the southern tip of Baja California.  Juliette was moving toward the northwest at 10 m.p.h. (16 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 996 mb.

Tropical Storm Juliette intensified on Tuesday as it moved over the Eastern North Pacific Ocean southwest of Baja California.  More thunderstorms formed near the center of Juliette’s circulation.  Thunderstorms were also occurring in bands in the southern half of Tropical Storm Juliette.  Bands in the northern side of Juliette’s circulation consisted primarily of showers and lower clouds.  Storms near the center of Juliette generated upper level divergence that pumped mass away to the south and west of the tropical storm.

The circulation around Tropical Storm Juliette was small.  Winds to tropical storm force extended out 70 miles (110 km) from the center of Juliette’s circulation.

Tropical Storm Juliette will move through an environment unfavorable for intensification during the next 24 hours.  Juliette will move over water where the Sea Surface Temperatures are near 24°C.  It will move under the southeastern part of an upper level ridge over the Eastern North Pacific Ocean.  The upper level ridge will produce northeasterly winds that will blow toward the top of Juliette’s circulation.  Those winds will cause moderate vertical wind shear.  The combination of cooler Sea Surface Temperatures and moderate vertical wind shear will cause Tropical Storm Juliette to weaken during the next 24 hours.

Tropical Storm Juliette will move around the western end of a high pressure system over northwestern Mexico.  The high pressure system will steer Juliette toward the northwest during the next 24 hours.  On its anticipated track, Tropical Storm Juliette will remain far to the west of Baja California.

Tropical Storm Juliette Forms South of Baja California

Tropical Storm Juliette formed over the Eastern North Pacific Ocean south of Baja California early on Monday.  At 5:00 a.m. EDT on Monday the center of Tropical Storm Julliette was located at latitude 16.8°N and longitude 111.8°W which put the center about 440 miles (770 km) south-southwest of the southern tip of Baja California.  Juliette was moving toward the west-northwest at 13 m.p.h. (21 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 1003 mb.

A low pressure system over the Eastern North Pacific Ocean south of Baja California strengthened early on Monday and the U.S. National Hurricane Center designated the system as Tropical Storm Juliette.

More thunderstorms were developing near the center of Tropical Storm Juliette on Monday morning.  Thunderstorms were also forming in bands revolving around the center of Juliette’s circulation.  Storms near the center of Juliette began to generate upper level divergence that pumped mass away from the tropical storm.  The removal of mass caused the surface pressure to decrease.

The strongest winds were occurring in the northern side of Tropical Storm Juliette.  Winds to tropical storm force extended out 50 miles (80 km) in the northern side of Juliette’s circulation.  The winds in the southern side of Tropical Storm Juliette were blowing at less than tropical storm force.

Tropical Storm Juliette will move through an environment favorable for intensification during the next 24 hours.  Juliette 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 centered over Mexico.  The upper level ridge will produce easterly winds that will blow toward the top of Juliette’s circulation.  Those winds will cause some vertical wind shear, but he wind shear will not be enough to prevent intensification.  Tropical Storm Juliette will intensify during the next 24 hours.

Tropical Storm Juliette will move around the southern side of a high pressure system over the Eastern North Pacific Ocean.  The high pressure system will steer Juliette toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Juliette will move southwest of Baja California.

 

Henriette Weakens Back to a Tropical Storm

Former Hurricane Henriette weakened back to a tropical storm over the Central Pacific Ocean north of Hawaii on Tuesday.  At 11:00 a.m. EDT on Tuesday the center of Tropical Storm Henriette was located at latitude 32.8°N and longitude 161.6°W which put the center about 825 miles (1330 km) north-northwest of Honolulu, Hawaii.  Henriette was moving toward the northwest at 16 m.p.h. (26 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 994 mb.

Former Hurricane Henriette weakened back to a tropical storm over the Central Pacific Ocean north of Hawaii on Tuesday.  Henriette moved into a region of drier air that is northwest of Hawaii.  The drier air was pulled around the southern side of Tropical Storm Henriette.  The drier air affect the structure of Henriette.

Thunderstorms were still occurring near the center of Tropical Storm Henriette.  Thunderstorms were also still occurring in bands in the eastern and northern sides of Henriette’s circulation.  Bands in the southern and western sides of Tropical Storm Henriette consisted primarily of showers and lower clouds.

The circulation around Tropical Storm Henriette was small.  Winds to tropical storm force extended out 80 miles (130 km) from the center of Henriette’s circulation.

Tropical Storm Henriette will move through an environment that will become more unfavorable for intensification during the next 24 hours.  Henriette will move over water where the Sea Surface Temperatures are near 26°C.  It will move under the eastern side of an upper level low that is northwest of Hawaii.  The upper level low will produce southerly winds that will blow toward the top of Henriette’s circulation.  Those winds will cause the vertical wind shear to increase.  In addition, Henriette will continue to move through the region of drier air northwest of Hawaii.  More vertical wind shear and the effects of the drier will cause Tropical Storm Henriette to continue to weaken during the next 24 hours.

Tropical Storm Henriette will move around the southwestern part of a high pressure system over the central North Pacific Ocean.  The high pressure system will steer Henriette toward the northwest during the next 24 hours.  On its anticipated track, Tropical Storm Henriette will continue to move farther away from Hawaii.

Hurricane Henriette Moves North of Hawaii

Hurricane Henriette moved north of Hawaii on Monday.  At 5:00 p.m. EDT on Monday the center of Hurricane Henriette was located at latitude 29.8°N and longitude 157.8°W which put the center about 585 miles (945 km) north of Honolulu, Hawaii.  Henriette was moving toward the northwest at 18 m.p.h. (30 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 986 mb.

Hurricane Henriette strengthened slightly as it moved north of Hawaii on Monday.  A small clear area appeared intermittently at the center of Henriette’s circulation.  The clear area could be evidence that an eye may form at the center of Hurricane Henriette.  The clear area 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 Henriette’s circulation.  Storms near the center of Henriette generated upper level divergence that pumped mass away from the hurricane.

The circulation around Hurricane Henriette was small.  Winds to tropical storm force extended out 20 miles (30 km) from the center of Henriette’s circulation.  Winds to tropical storm force extended out 70 miles (110 km) from the center of Hurricane Henriette.

Hurricane Henriette will move through an environment mostly favorable for intensification during the next 24 hours.  Henriette will move over water where the Sea Surface Temperatures are near 26°C.  It will move under the eastern side of an upper level low that is northwest of Hawaii.  Henriette will move north of a smaller upper level low that is north of Hawaii.  The upper level winds are weak in the zone between the two upper level lows and there will be little vertical wind shear.  Hurricane Henriette could intensify during the next 24 hours.  The upper level winds will get stronger when Henriette moves closer to the upper level low northwest of Hawaii later on Tuesday.  Henriette could start to weaken by Tuesday night.

Hurricane Henriette will move around the southwestern part of a high pressure system over the central North Pacific Ocean.  The high pressure system will steer Henriette toward the northwest during the next 24 hours.  On its anticipated track, Hurricane Henriette will move farther away from Hawaii.

Henriette Rapidly Intensifies to a Hurricane

Former Tropical Storm Henriette rapidly intensified to a hurricane northeast of Hawaii on Sunday.  At 5:00 p.m. EDT on Sunday the center of Hurricane Henriette was located at latitude 25.7°N and longitude 152.5°W which put the center about 455 miles (735 km) northeast of Honolulu, Hawaii.  Henriette was moving toward the northwest at 17 m.p.h. (28 km/h).  The maximum sustained wind speed was 80 m.p.h. (130 km/h) and there were wind gusts to 100 m.p.h. (160 km/h).  The minimum surface pressure was 990 mb.

Former Tropical Storm Henriette rapidly intensified to a hurricane northeast of Hawaii on Sunday.  The inner end of a rainband wrapped around the center of Henriette’s circulation.  A circular eye with a diameter of 15 miles (24 km) formed at the center of Hurricane Henriette.  The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that rings of storms.  Bands of showers and thunderstorms were revolving around the center of Henriette’s circulation.  Storms near the center of Henriette generated upper level divergence that pumped mass away from the hurricane.  The removal of mass caused the surface pressure to decrease.

The circulation around Hurricane Henriette was small.  Winds to hurricane force extended out 20 miles (30 km) from the center of Henriette’s circulation.  Winds to tropical storm force extended out 70 miles (110 km) from the center of Hurricane Henriette.

Hurricane Henriette will move through an environment favorable for intensification during the next 24 hours.  Henriette will move over water where the Sea Surface Temperatures are near 26°C.  It will move under the middle of an upper level trough that is east of Hawaii.  The upper level winds are weak near the middle of the trough and there will be little vertical wind shear. Hurricane Henriette will intensify during the next 24 hours.  Henriette could continue to intensify rapidly.

Hurricane Henriette will move around the southwestern part of a high pressure system over the central North Pacific Ocean.  The high pressure system will steer Henriette toward the northwest during the next 24 hours.  On its anticipated track, Hurricane Henriette will pass well to the north of Hawaii.

Elsewhere, Tropical Storm Ivo continued to churn west of Baja California. At 5:00 p.m. EDT on Sunday the center of Tropical Storm Ivo was located at latitude 22.1°N and longitude 117.2°W which put the center about 470 miles (755 km) west of the southern tip of Baja California.  Ivo was moving toward the west-northwest at 12 m.p.h. (19 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 1006 mb.

Tropical Storm Henriette Passes Northeast of Hawaii

Tropical Storm Henriette was passing northeast of Hawaii on Sunday.  At 5:00 a.m. EDT on Sunday the center of Tropical Storm Henriette was located at latitude 23.8°N and longitude 150.3°W which put the center about 420 miles (675 km) northeast Hilo, Hawaii.  Henriette was moving toward the northwest at 15 m.p.h. (24 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 1006 mb.

Former Tropical Storm Henriette strengthened back to a tropical storm as it moved northeast of Hawaii on Sunday.  More thunderstorms former near the center of Henriette’s circulation.  The inner end of a rainband wrapped much of the way around the center of Tropical Storm Henriette.  A clear area was forming at the center of Henriette.  Storms near the center of Henriette generated upper level divergence that pumped mass away from the tropical storm.

The circulation around Tropical Storm Henriette was small.  Winds to tropical storm force extended out 105 miles (165 km) from the center of Henriette’s circulation.

Tropical Storm Henriette will move through an environment favorable for intensification during the next 24 hours.  Henriette will move over water where the Sea Surface Temperatures are near 26°C.  It will move under the middle of an upper level trough that is east of Hawaii.  The upper level winds are weak near the middle of the trough and there will be little vertical wind shear.  Tropical Storm Henriette will intensify during the next 24 hours.

Tropical Storm Henriette will move around the southwestern part of a high pressure system over the Eastern North Pacific Ocean.  The high pressure system will steer Henriette toward the northwest during the next 24 hours.  On its anticipated track, Tropical Storm Henriette will pass well to the north of Hawaii.

Elsewhere, Tropical Storm Ivo was weakening southwest of Baja California.  At 5:00 a.m. EDT on Sunday the center of Tropical Storm Ivo was located at latitude 21.5°N and longitude 114.9°W which put the center about 335 miles (535 km) west-southwest of the southern tip of Baja California.  Ivo was moving toward the west-northwest at 8 m.p.h. (13 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 1006 mb.

Tropical Storm Ivo Moves South of Baja California

Tropical Storm Ivo moved south of Baja California on Friday.  At 5:00 p.m. EDT on Friday the center of Tropical Storm Ivo was located at latitude 20.4°N and longitude 111.2°W which put the center about 190 miles (310 km) south-southwest of the southern tip of Baja California.  Ivo was moving toward the west at 13 m.p.h. (21 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 999 mb.

Tropical Storm Ivo exhibited much more organization on Friday after it moved south of Baja California.  The inner end of a rainband wrapped around the western side of the center of Ivo’s circulation.  Other bands of showers and thunderstorms were revolving around the center of Tropical Storm Ivo.  Storms near the center of Ivo generated upper level divergence that pumped mass away from the tropical storm.  The removal of mass caused the surface pressure to decrease.

The circulation around Tropical Storm Ivo was small.  Winds to tropical storm force extended out 35 miles (55 km) from the center of Ivo’s circulation.

Tropical Storm Ivo will move through an environment mostly favorable for intensification during the next 24 hours.  Ivo will move over water where the Sea Surface Temperatures are near 27°C.  It will move under the southern side of an upper level ridge over Mexico and the Eastern North Pacific Ocean.  The upper level ridge will produce easterly winds that will blow toward the top of Ivo’s circulation.  However, the winds in the lower atmosphere will also blow from the east.  Since the winds in the upper and lower levels of the atmosphere will blow from the same direction, there will be less vertical wind shear.  Tropical Storm Ivo is likely to intensify during the next 24 hours.  Ivo could strengthen to a hurricane on Saturday.  Ivo will move over cooler water on Sunday which will cause it to weaken.

Tropical Storm Ivo will move around the southern side of a high pressure system that is over Mexico and the eastern North Pacific Ocean.  The high pressure system will steer Ivo toward the west during the next 24 hours.  On its anticipated track, Tropical Storm Ivo will move away from Baja California during the weekend.