Tag Archives: Dexter

Tropical Storm Dexter Passes South of Newfoundland

Tropical Storm Dexter passed south of Newfoundland on Wednesday evening.  At 11:00 p.m. EDT on Wednesday the center of Tropical Storm Dexter was located at latitude 40.2°N and longitude 54.2°W which put the center about 450 miles (730 km) south of Cape Race, Newfoundland.  Dexter was moving toward the east at 17 m.p.h. (28 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 999 mb.

Tropical Storm Dexter was making a transition to an extratropical cyclone on Wednesday evening.  Dexter was move over water where the Sea Surface Temperatures are near 24°C.  It was moving under the southern part of an upper level trough that is southwest of Greenland.  The upper level trough was producing strong westerly winds that were blowing toward the top of Dexter’s circulation.  Those winds were causing strong vertical wind shear.  The cool Sea Surface Temperatures and the strong vertical wind shear were causing Tropical Storm Dexter to make a transition to an extraropical cyclone.

The transition to an extratropical cyclone was causing changes to the structure of Tropical Storm Dexter.  Thunderstorms were still developing in the eastern side of Dexter’s circulation.  Bands in the other parts of Tropical Storm Dexter consisted primarily of showers and lower clouds.

The size of the circulation around Tropical Storm Dexter increased as Dexter made its transition to an extratropical cyclone.  Winds to tropical storm force extended out 170 miles (275 km) from the center of Dexter’s circulation.

The upper level trough southwest of Greenland will steer Tropical Storm Dexter toward the east-northeast during the next 48 hours.  On its anticipated track, Tropical Storm Dexter will pass south of Greenland and Iceland.

Tropical Storm Dexter will complete the transition to a strong extratropical cyclone on Thursday.  Dexter is likely to strengthen as it completes the transition to an extratropical cyclone.

Tropical Storm Dexter Moves South of Nova Scotia

Tropical Storm Dexter moved south of Nova Scotia on Tuesday evening.  At 11:00 p.m. EDT on Tuesday the center of Tropical Storm Dexter was located at latitude 38.9°N and longitude 61.3°W which put the center about 410 miles (660 km) south-southeast of Halifax, Nova Scotia.  Dexter was moving toward the east-northeast 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 1005 mb.

The structure of Tropical Storm Dexter did not change much on Tuesday.  Strong westerly winds in the upper troposphere were blowing toward the top of Dexter’s circulation.  Those winds were causing strong vertical wind shear.  The vertical wind shear was making the distribution of thunderstorms asymmetrical.  Thunderstorms were still forming in bands in the eastern side of Tropical Storm Dexter.  Bands in the western side of Dexter’s circulation consisted primarily of showers and lower clouds.

Winds to tropical storm force extended out 80 miles (130 km) from the center of Tropical Storm Dexter.

Tropical Storm Dexter will move through an environment unfavorable for intensification of a tropical cyclone during the next 24 hours.  Dexter will move over water where the Sea Surface Temperatures are near 26°C. An upper level trough over eastern Canada U.S. will continue to cause strong vertical wind shear.  The strong wind shear will prevent Tropical Storm Dexter from intensifying as a tropical cyclone.  However, Tropical Storm Dexter will make a transition to and extratropical cyclone during the next day or two.  Dexter is likely to get stronger when it starts to make a transition to an extratropical cyclone.

The upper level trough over eastern Canada U.S. will steer Tropical Storm Dexter toward the east-northeast during the next 24 hours. On its anticipated track, Tropical Storm Dexter will move south of Newfoundland on Wednesday.

Tropical Storm Dexter Passes North of Bermuda

Tropical Storm Dexter passed north of Bermuda on Monday evening.  At 11:00 p.m. EDT on Monday the center of Tropical Storm Dexter was located at latitude 36.8°N and longitude 65.6°W which put the center about 315 miles (415 km) north of Bermuda.  Dexter was moving toward the northeast at 13 m.p.h. (21 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.

An upper level trough near the east coast of the U.S. was producing strong westerly winds that were blowing toward the top of Tropical Storm Dexter.  Those winds were causing strong vertical wind shear.  The wind shear was affecting the structure of Dexter’s circulation.  Thunderstorms were occurring in bands in the eastern side of Tropical Storm Dexter.  Bands in the western side of Dexter’s circulation consisted primarily of showers and lower clouds.

The strong vertical wind shear and the asymmetrical distribution of thunderstorms were also affecting the distribution of wind speeds in Tropical Storm Dexter.  Winds to tropical storm force extended out 90 miles (145 km) in the eastern side of Dexter’s circulation.  The winds in the western side of Tropical Storm Dexter were blowing at less than tropical storm force.

Tropical Storm Dexter will move through an environment unfavorable for intensification of a tropical cyclone during the next 24 hours.  Dexter will move over water where the Sea Surface Temperatures are near 27°C.  The upper level trough near the east coast of the U.S. will continue to cause strong vertical wind shear.  The strong wind shear will prevent Tropical Storm Dexter from intensifying.  Dexter could get stronger when it starts to make a transition to an extratropical cyclone.

The upper level trough near the east coast of the U.S. will steer Tropical Storm Dexter toward the east-northeast during the next 24 hours.  On its anticipated track, Tropical Storm Dexter will move farther away from Bermuda.

Tropical Storm Dexter Forms East of North Carolina

Tropical Storm Dexter formed over the Atlantic Ocean east of North Carolina on Sunday evening.  At 11:00 p.m. EDT on Sunday the center of Tropical Storm Dexter was located at latitude 34.3°N and longitude 69.4°W which put the center about 300 miles (480km) west-northwest of Bermuda.  Dexter was moving toward the east-northeast 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.

A low pressure system over the Atlantic Ocean east of North Carolina strengthened on Sunday evening and the U.S. National Hurricane Center designated the system as Tropical Storm Dexter.

The appearance of the low pressure system that became Tropical Storm Dexter began to look much more like a tropical storm on Sunday evening.  More thunderstorms formed near the center of Dexter’s circulation.  There was also a well developed band of thunderstorms in the eastern side of Tropical Storm Dexter.  Bands in the western side of Dexter’s circulation still consisted primarily of showers and lower clouds.  Storms near the center of Dexter began to generate upper level divergence that pumped mass away to the east of the tropical storm.  The removal of mass caused the surface pressure to decrease.

Most of the stronger winds were occurring in the eastern side of Tropical Storm Dexter.  Winds to tropical storm force extended out 140 miles (225 km) in the eastern side of Dexter’s circulation.  Winds to tropical storm force extended out 35 miles (55 km) in the western side of Tropical Storm Dexter.

Tropical Storm Dexter will move through an environment somewhat favorable for intensification during the next 24 hours.  Dexter will move over water where the Sea Surface Temperatures are near 29°C.  It will move under the eastern side of an upper level trough over the eastern U.S.  The upper level trough will produce southwesterly winds that will blow toward the top of Dexter’s circulation.  Those winds will cause moderate vertical wind shear.  The vertical wind shear will inhibit intensification, but the wind shear may not be enough to prevent intensification.  Tropical Storm Dexter is likely to intensify on Monday.

Tropical Storm Dexter will move around the northwestern part of a subtropical high pressure over the Atlantic Ocean.  The high pressure system will steer Dexter toward the east-northeast during the next 24 hours.  On its anticipated track, Tropical Storm Dexter will pass north of Bermuda during Monday night.