Tag Archives: EP14

Norbert Weakens to a Tropical Depression

Former Tropical Storm Norbert weakened to a tropical depression as it moved over the Central North Pacific Ocean on Monday evening.  At 11:00 p.m. EDT on Monday the center of Tropical Depression Norbert was located at latitude 20.2°N and longitude 140.5°W which put the center about 950 miles (1525 km) east of Hilo, Hawaii.  Norbert was moving toward the west-northwest at 15 m.p.h. (24 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 1006 mb.

Former Tropical Storm Norbert weakened to a tropical depression on Monday evening.  Drier air caused many of the thunderstorms in Tropical Depression Norbert to weaken on Monday.  A few thunderstorms were still occurring in bands on the periphery of Norbert’s circulation.  Many of the bands revolving around the center of Tropical Depression Norbert consisted primarily of showers and lower clouds.  Since there were few thunderstorms near the center of Norbert, there was very little upper level divergence.  Convergence of mass in the lower levels of the atmosphere caused the surface pressure to increase on Monday.

Tropical Depression Norbert will move through an environment that will be unfavorable for intensification during the next 24 hours.  Norbert will move over water where the Sea Surface Temperatures are near 26°C.  An upper level low that is northeast of Hawaii will continue to produce southwesterly winds that will blow toward the top of Norbert’s circulation.  Those winds will continue to cause moderate vertical wind shear.  Norbert will also continue to move through a mass of drier air that is east of Hawaii.  Tropical Depression Norbert is likely to continue to weaken on Tuesday because of the moderate vertical wind shear and the drier air.

Tropical Depression Norbert will move around the southern part of a high pressure system that is over the Central North Pacific Ocean.  The high pressure system will steer Norbert toward the west during the next 24 hours,  On its anticipated track, Tropical Depression Norbert will still be far to the east of Hawaii on Tuesday.

Elsewhere, Tropical Depression Fifteen-E continued to move farther away from Baja California.

At 11:00 p.m. EDT on Monday the center of Tropical Depression Fifteen-E was located at latitude 16.5°N and longitude 121.6°W which put the center about 880 miles (1415 km) west-southwest of the southern tip of Baja California.  The tropical depression was moving toward the west 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 1005 mb.

Tropical Storm Norbert Still Moving West

Tropical Storm Norbert was still moving west toward the Central North Pacific Ocean on Sunday evening.  At 11:00 p.m. EDT on Sunday the center of Tropical Storm Norbert was located at latitude 19.2°N and longitude 135.3°W which put the center about 1290 miles (2075 km) east of Hilo, Hawaii.  Norbert 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 1002 mb.

Tropical Storm Norbert did not change much on Sunday.  The distribution of thunderstorms in Norbert continued to be asymmetrical.  Thunderstorms were still occurring in bands in the eastern side of Norbert’s circulation.  Bands in the western half of Tropical Storm Norbert consisted primarily of showers and lower clouds.  Storms near the center of Norbert still generated some upper level divergence that pumped mass away from the tropical storm.  The removal of mass in the upper levels was nearly equal to the convergence of mass in the lower levels of the atmosphere.  So, the surface pressure remained steady on Sunday.

The asymmetrical distribution of thunderstorms in Tropical Storm Norbert also affected the distribution of wind speeds.  Winds to tropical storm force extended out 105 miles (165 km) in the northern half of Norbert’s circulation.  Winds to tropical storm force only extended out 35 miles (55 km) in the southern side of Tropical Storm Norbert.

Tropical Storm Norbert will move through an environment that will be mostly unfavorable for intensification during the next 24 hours.  Norbert will move over water where the Sea Surface Temperatures are near 26°C.  An upper level low that is northeast of Hawaii will produce southwesterly winds that will blow toward the top of Norbert’s circulation.  Those winds will continue to cause moderate vertical wind shear.  Norbert will also continue to move through the mass of drier air that is east of Hawaii.  Tropical Storm Norbert is unlikely to intensify on Monday because of the moderate vertical wind shear and the drier air.

Tropical Storm Norbert 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 Norbert toward the west during the next 24 hours,  On its anticipated track, Tropical Storm Norbert will still be far to the east of Hawaii on Monday.

Elsewhere, Tropical Depression Fifteen-E formed southwest of Baja California.

At 11:00 p.m. EDT on Sunday the center of Tropical Depression Fifteen-E was located at latitude 17.0°N and longitude 118.3°W which put the center about 680 miles (1095 km) southwest of the southern tip of Baja California.  The tropical depression was moving toward the west 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 1006 mb.

Tropical Storm Norbert Churns West

Tropical Storm Norbert churned west toward the Central North Pacific Ocean on Saturday.  At 11:00 p.m. EDT on Saturday the center of Tropical Storm Norbert was located at latitude 17.9°N and longitude 130.5°W which put the center about 1610 miles (2595 km) east of Hilo, Hawaii. Norbert was moving toward the west at 12 m.p.h. (19 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 1002 mb.

Tropical Storm Norbert weakened on Saturday.  A large upper level low that was northeast of Hawaii produced southwesterly winds that blew toward the top of Norbert’s circulation.  Those winds caused moderate vertical wind shear.  In addition, Norbert moved into a mass of drier air that was east of Hawaii.  The moderate vertical wind shear and drier air caused Tropical Storm Norbert to weaken on Saturday.

The moderate vertical wind shear and drier air also caused many of the thunderstorms in Tropical Storm Norbert to weaken.  Thunderstorms were still occurring in bands in the northern side of Norbert’s circulation.  Bands in the southern half of Tropical Storm Norbert consisted primarily of showers and lower clouds.  Since there were fewer thunderstorms near the center of Norbert’s circulation, those storms generated less upper level divergence.  The removal of less mass caused the surface pressure to increase on Saturday.

The asymmetrical distribution of thunderstorms in Tropical Storm Norbert also affected the distribution of wind speeds.  Winds to tropical storm force extended out 105 miles (165 km) in the northern half of Norbert’s circulation.  Winds to tropical storm force only extended out 35 miles (55 km) in the southern side of Tropical Storm Norbert.

Tropical Storm Norbert will move through an environment that will be mostly unfavorable for intensification during the next 24 hours.  Norbert will move over water where the Sea Surface Temperatures are near 26°C.  The upper level low that is northeast of Hawaii will continue to produce moderate vertical wind shear.  Norbert will also continue to move through the mass of drier air that is east of Hawaii.  Tropical Storm Norbert is unlikely to intensify on Sunday because of the moderate vertical wind shear and the drier air.

Tropical Storm Norbert 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 Norbert toward the west during the next 24 hours,  On its anticipated track, Tropical Storm Norbert will move toward Hawaii on Sunday.

Tropical Storm Norbert Develops Southwest of Baja California

Tropical Storm Norbert developed over the Eastern North Pacific Ocean southwest of Baja California on Wednesday night.  At 5:00 a.m. EDT on Thursday the center of Tropical Storm Norbert was located at latitude 16.4°N and longitude 117.9°W which put the center about 685 miles (1105 km) southwest of the southern tip of Baja California.  Norbert was moving toward the west 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 1004 mb.

A low pressure system over the Eastern North Pacific Ocean southwest of Baja California strengthened on Wednesday night and the U.S. National Hurricane Center designated the system as Tropical Storm Norbert.

The distribution of thunderstorms in Tropical Storm Norbert was asymmetrical.  Thunderstorms were occurring in bands in the eastern side of Norbert’s circulation.  Bands in the western side of Tropical Storm Norbert consisted primarily of showers and lower clouds.

An upper level low that was west of Baja California was producing westerly winds that were blowing toward the top of Tropical Storm Norbert.  Those winds were causing moderate vertical wind shear.  The moderate vertical wind shear was causing the asymmetrical distribution of thunderstorms.

The strongest winds were blowing in the northeastern part of Tropical Storm Norbert.  Winds to tropical storm force extended out 60 miles (95 km) in the northeastern quadrant of Norbert’s circulation.  The winds in the other parts of Tropical Storm Norbert were blowing at less than tropical storm force.

Tropical Storm Norbert will move through an environment that will be somewhat favorable for intensification during the next 24 hours.  Norbert will move over water where the Sea Surface Temperatures are near 29°C.  However, the upper level low west of Baja California will continue to cause moderate vertical wind shear.  The vertical wind shear will inhibit intensification.  Tropical Storm Norbert is likely to intensify slowly because of the moderate vertical wind shear.

Tropical Storm Norbert 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 Norbert toward the west during the next 24 hours,  On its anticipated track, Tropical Storm Norbert will move farther away from Baja California.

Elsewhere, Tropical Storm Lowell continued to spin far to the northwest of Hawaii.

At 5:00 a.m. EDT on Thursday the center of Tropical Storm Lowell was located at latitude 29.2°N and longitude 166.2°W which put the center about 655 miles (1050 km) northwest of Lihue, Hawaii.  Lowell 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 993 mb.

Tropical Storm Priscilla Forms Southwest of Mexico

Tropical Storm Priscilla 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 Priscilla was located at latitude 15.5°N and longitude 106.6°W which put the center about 285 miles (460 km) south-southwest of Manzanillo, Mexico.  Priscilla was moving toward the northwest at 7 m.p.h. (11 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 1002 mb.

A Tropical Storm Watch was issued for the portion of the coast from Punta San Telmo to Punta Mita, Mexico.

A low pressure system over the Eastern North Pacific Ocean southwest of Mexico strengthened on Saturday afternoon and the U.S. National Hurricane Center designated the system as Tropical Storm Priscilla.

The circulation around Tropical Storm Priscilla was large.  More thunderstorms formed near the center of Priscilla’s circulation on Saturday afternoon.  Bands of showers and thunderstorms were revolving around the center of Tropical Storm Priscilla.  Storms near the center of Priscilla began to generate upper level divergence that pumped mass away from the tropical storm.

The strongest winds were occurring in the northern side of Tropical Storm Priscilla.  Winds to tropical storm force extended out 140 miles (225 km) in the northern part of Priscilla’s circulation.  The winds in the southern side of Tropical Storm Priscilla were blowing at less than tropical storm force.

Tropical Storm Priscilla will move through an environment favorable for intensification during the next 24 hours.  Priscilla will move over water where the Sea Surface Temperatures are near 28°C.   It will move under the middle of an upper level ridge over Mexico and the Eastern North Pacific Ocean.  The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear.  Tropical Storm Priscilla will intensify during the next 24 hours.  Priscilla could strengthen to a hurricane by Monday.

Tropical Storm Priscilla will move around the western end of a high pressure system over Mexico.  The high pressure system will steer Priscilla slowly toward the north-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Priscilla will move a little closer toward the west coast of Mexico.

Elsewhere over the Eastern North Pacific Ocean, Tropical Storm Octave continued to meander far to the south-southwest of Baja California.  At 5:00 p.m. EDT on Saturday the center of Tropical Storm Octave was located at latitude 14.9°N and longitude 123.9°W which put the center about 1065 miles (1720 km) south-southwest of the southern tip of Baja California.  Octave was moving toward the north-northwest at 6 m.p.h. (10 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 997 mb.

Narda Weakens to a Tropical Storm

Former Hurricane Narda weakened to a tropical storm as it moved over cooler water west of Baja California on Saturday evening.  At 11:00 p.m. EDT on Saturday the center of Tropical Storm Narda was located at latitude 18.7°N and longitude 125.9°W which put the center about 1070 miles (1725 km) west-southwest of the southern tip of Baja California.  Narda was moving toward the north-northwest at 5 m.p.h. (8 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 991 mb.

Former Hurricane Narda weakened to a tropical storm as it moved over cooler water west of Baja California.  Many of the thunderstorms in Narda’s circulation weakened when it moved over the cooler water.  There were still some thunderstorms occurring near the center of Tropical Storm Narda.  However, those storms generated much less upper level divergence.  As a result, the inflow of mass in the lower levels of the atmosphere was greater than the outflow of mass in the upper levels.  The greater inflow of mass caused the surface pressure to increase.

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

Tropical Storm Narda will move through an environment that will be unfavorable for intensification during the next 24 hours.  Narda 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 Narda will weaken during the next 24 hours as it moves over colder Sea Surface Temperatures.

Tropical Storm Narda will move around the western side of a high pressure system that is over Mexico and the Eastern North Pacific Ocean.  The high pressure system will steer Narda toward the north during the next 24 hours.  On its anticipated track, Tropical Storm Narda will remain far to the west of Baja California.

 

Hurricane Narda Spins Southwest of Baja California

Hurricane Narda was spinning southwest of Baja California on Friday morning.  At 5:00 a.m. EDT on Friday the center of Hurricane Narda was located at latitude 16.4°N and longitude 120.7°W which put the center about 835 miles (1340 km) west-southwest of the southern tip of Baja California.  Narda 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. (165 km/h).  The minimum surface pressure was 980 mb.

Hurricane Narda did not change much during the past 36 hours.  Thunderstorms were still occurring near the center of Narda’s circulation.  Bands of showers and thunderstorms were revolving around the center of Hurricane Narda.  Storms near the center of Narda generated upper level divergence that pumped mass away from the hurricane.  The outflow of mass in the upper levels was nearly equal to the inflow of mass in the lower levels of the atmosphere.  So, the surface pressure did not change much.

The size of the circulation around Hurricane Narda did increase during the past 36 hours.  Winds to hurricane force extended out 45 miles (75 km) from the center of Narda’s circulation.  Winds to tropical storm force extended out 185 miles (295 km) from the center of Hurricane Narda.

Hurricane Narda will move through an environment that will be somewhat favorable for intensification during the next 24 hours.  Narda will move over water where the Sea Surface Temperatures are near 27°C.  An upper level ridge that is over northwestern Mexico and the Eastern North Pacific will produce easterly winds that will blow toward the top of Narda’s circulation.  Those winds will cause moderate vertical wind shear.  The vertical wind shear will still inhibit intensification, but the wind shear may not be enough to stop intensification. Hurricane Narda could intensify during the next 24 hours.

Hurricane Narda 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 Narda toward the west during the next 24 hours.  On its anticipated track, Hurricane Narda will move farther away from Baja California.  Narda is forecast to move toward the north during the weekend when it reaches the western end of the high pressure system.

Hurricane Narda Moves South of Baja California

Hurricane Narda moved south of Baja California on Wednesday.  At 5:00 p.m. EDT on Wednesday the center of Hurricane Narda was located at latitude 15.1°N and longitude 112.3°W which put the center about 560 miles (905 km) south-southwest of the southern tip of Baja California.  Narda was moving toward the west at 10 m.p.h. (16 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 976 mb.

The distribution of thunderstorms in Hurricane Narda became more asymmetrical on Wednesday.  Most of the thunderstorms were occurring in bands in the western side of Narda’s circulation.  Bands in the eastern side of Hurricane Narda consisted primarily of showers and lower clouds.  Storms near the center of Narda still generated upper level divergence that pumped mass away to the west of the hurricane.

An upper level ridge over northwestern Mexico was producing easterly winds that blew toward the top of Hurricane Narda.  Those winds caused moderate vertical wind shear.  The moderate vertical wind shear caused the distribution of thunderstorms to become asymmetrical.

The size of the circulation around Hurricane Narda increased on Wednesday.  Winds to hurricane force extended out 30 miles (50 km) from the center of Narda’s circulation.  Winds to tropical storm force extended out 140 miles (225 km) from the center of Hurricane Narda.

Hurricane Narda will move through an environment that will become more favorable for intensification during the next 24 hours.  Narda will move over water where the Sea Surface Temperatures are near 28°C.  The upper level ridge that is over northwestern Mexico will continue to produce easterly winds that will blow toward the top of Narda’s circulation.  However, those winds are forecast to weaken on Thursday, which would mean there will be less vertical wind shear.  The vertical wind shear will still inhibit intensification, but the wind shear may not be enough to stop intensification.  Hurricane Narda could intensify during the next 24 hours if the upper level winds weaken.

Hurricane Narda 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 Narda toward the west during the next 24 hours.  On its anticipated track, Hurricane Narda will move southwest of Baja California.

Narda Intensifies to a Hurricane

Former Tropical Storm Narda intensified to a hurricane over the Eastern North Pacific Ocean southwest of Mexico on Tuesday.  At 11:00 a.m. EDT on Tuesday the center of Hurricane Narda was located at latitude 15.8°N and longitude 107.3°W which put the center about 295 miles (475 km) southwest of Manzanillo, Mexico.  Narda was moving toward the west at 13 m.p.h. (21 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 981 mb.

Former Tropical Storm Narda intensified to a hurricane on Tuesday.  The inner end of a rainband wrapped around the western side of Narda’s circulation.  Bands of showers and thunderstorms were revolving around the center of Hurricane Narda.  Storms near the center of Narda 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 blowing in the northern side of Hurricane Narda.  Winds to hurricane force extended out 20 miles (30 km) in the northern half of Narda’s circulation.  Winds to tropical storm force extended out 70 miles (110 km) from the center of Hurricane Narda.

Hurricane Narda will move through an environment that will be favorable for intensification during the next 24 hours.  Narda 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 that is over northwestern Mexico.  The upper level ridge will produce easterly winds that will blow toward the top of Narda’s circulation.  Those winds will cause some vertical wind shear.  The vertical wind shear will inhibit intensification, but the wind shear will not be enough to stop intensification.  Hurricane Narda will intensify during the next 24 hours.

Hurricane Narda 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 Narda toward the west during the next 24 hours.  On its anticipated track, Hurricane Narda will move south of Baja California on Wednesday.

Tropical Storm Narda Forms South of Mexico

Tropical Storm Narda formed over the Eastern North Pacific Ocean south of Mexico on Sunday.  At 11:00 p.m. EDT on Sunday the center of Tropical Storm Narda was located at latitude 15.3°N and longitude 100.5°W which put the center about 180 miles (290 km) south-southeast of Zihuatanejo, Mexico.  Narda was moving toward the northwest at 10 m.p.h. (16 km/h).  The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h).  The minimum surface pressure was 1005 mb.

A low pressure system over the Eastern North Pacific Ocean south of Mexico strengthened on Sunday and the U.S. National Hurricane Center designated the system as Tropical Storm Narda.

The circulation around Tropical Storm Narda was slowly becoming more organized.  Some thunderstorms began to develop near the center of Narda’s circulation.  Bands of showers and thunderstorms were starting to revolve around the center of Tropical Storm Narda.

The strongest winds were in the northern half of Tropical Storm Narda.  Winds to tropical storm force extended out 70 miles (110 km) in the northern side of Narda’s circulation.  The winds in the southern side of Tropical Storm Narda were blowing at less than tropical storm force.

Tropical Storm Narda will move through an environment that will be somewhat favorable for intensification during the next 24 hours.  Narda 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 that is over northern Mexico.  The upper level ridge will produce northeasterly winds that will blow toward the top of Narda’s circulation.  Those winds will cause moderate vertical wind shear.  The moderate vertical wind shear will inhibit intensification, but the wind shear may not be enough to stop intensification.  Tropical Storm Narda could intensify on Monday if the vertical wind shear does not increase.

Tropical Storm Narda 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 Narda toward the west-northwest during the next 24 hours.  On its anticipated track, Tropical Storm Narda will remain west of the coast of Mexico.