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Tropical Storm Arthur Brings Wind and Rain to Eastern North Carolina

Tropical Storm Arthur brought wind and rain to eastern North Carolina on Monday.  At 8:00 a.m. EDT on Monday the center of Tropical Storm Arthur was located at latitude 34.5°N and longitude 75.9°W which put it about 50 miles (80 km) south-southwest of Cape Hatteras, North Carolina.  Arthur was moving toward the north-northeast at 15 m.p.h. (24 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 1001 mb.

A Tropical Storm Warning was in effect for the portion of the coast from Surf City to Duck, North Carolina including Pamlico and Albemarle Sounds.

Tropical Storm Arthur began to move more quickly toward the Outer Banks of North Carolina on Monday morning.  The distribution of thunderstorms and winds around Arthur was asymmetric.  The strong thunderstorms were occurring in bands in the eastern half of the circulation.  The strongest winds were occurring in those bands.  Bands in the western half of Tropical Storm Arthur consisted primarily of showers and lower clouds.  Winds to tropical storm force extended out 90 miles (145 km) in the eastern half of Arthur.  The winds in the western half of Arthur were mostly less than tropical storm force.

The asymmetric structure of Tropical Storm Arthur meant that the strongest winds were occurring east of the Outer Banks of North Carolina.  A buoy at Diamond Shoals was reporting a sustained wind speed of 33 m.p.h. (54 km/h) and wind gusts to 47 m.p.h. (76 km/h).  The wind speeds along the coast of North Carolina were much weaker.  Tropical Storm Arthur was dropping moderate rain over eastern North Carolina.   Wind blowing water toward the coast was causing the water level to rise in some locations.  Waves were causing erosion on some beaches.

A large upper level trough will approach Tropical Storm Arthur from the west.  The trough will turn Arthur more toward the east later on Monday.  On its anticipated track, Tropical Storm Arthur should move away from North Carolina on Monday afternoon.  Weather conditions should improve gradually when Arthur moves farther form the coast.

Tropical Storm Arthur Prompts Warning for North Carolina

Tropical Storm Arthur prompted the National Hurricane Center to issue a Tropical Storm Warning for a portion of the coast of North Carolina.  A Tropical Storm Warning was in effect for the portion of the coast from Surf City to Duck, North Carolina including Pamlico and Albemarle Sounds.

At 11:00 a.m. EDT on Sunday the center of Tropical Storm Arthur was located at latitude 30.5°N and longitude 77.4°W which put it about 345 miles (560 km) south-southwest of Cape Hatteras, North Carolina.  Arthur was moving toward the north-northeast at 9 m.p.h. (15 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. (96 km/h).  The minimum surface pressure was 1002 mb.

The circulation around Tropical Storm Arthur exhibited more organization on Sunday morning.  Several bands of showers and thunderstorms were wrapping around the eastern and northern parts of the circulation.  Bands on the western side of Arthur still consisted primarily of showers and lower clouds.  Winds to tropical storm force extended out 115 miles (185 km) from the center of circulation on the eastern side of Tropical Storm Arthur.  The winds on the western side of Arthur were mostly below tropical storm force.

Tropical Storm Arthur will move through an environment favorable for intensification during the next 24 hours.  Arthur will move over water where the Sea Surface Temperature is near 25°C.  It will move under an upper level ridge centered off the southeast coast of the U.S.  The winds in the upper ridge are relatively weak and there will not be a lot of vertical wind shear.  Tropical Storm Arthur is likely to get stronger during the next 24 hours.

Tropical Storm Arthur will move around the western end of a high pressure system during the next 24 hours.  The ridge will steer Arthur toward the north-northeast during the next day or so.  A large upper level trough over the central U.S. will approach Tropical Storm Arthur on Monday.  The trough will steer Arthur more toward the east.  On its anticipated track Tropical Storm Arthur will approach the coast of North Carolina on Monday.  Arthur will bring gusty winds to the coast.  Wind blowing toward the shore will cause the water level to rise.  Waves will cause beach erosion.

Tropical Depression One Strengthens Into Tropical Storm Arthur

Tropical Depression One strengthened into Tropical Storm Arthur on Saturday night.  At 11:00 p.m. EDT on Saturday the center of Tropical Storm Arthur was located at latitude 29.4°N and longitude 77.7°W which put it about 420 miles (675 km) south-southwest of Cape Hatteras, North Carolina.  Arthur was moving toward the north-northeast at 13 m.p.h. (20 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.

A Tropical Storm Watch remains in effect for the portion of the coast from Surf City to Duck, North Carolina including Pamlico and Albemarle Sounds.

Surface observations and data from aircraft reconnaissance indicated that Tropical Depression One strengthened on Saturday night and the National Hurricane Center designated the system as Tropical Storm Arthur.  Thunderstorms continued to develop near the center of circulation and storms near the center generated upper level divergence which pumped mass away to the east of the depression.  Bands of showers and thunderstorms were developing.  The strongest bands were in the eastern half of the circulation.  Winds to tropical storm force extended out 80 miles (130 km) from the center in the eastern side of Tropical Storm Arthur.  Most of the winds in the western side of the circulation were less than tropical storm force.

Tropical Storm Arthur will move through an environment favorable for intensification during the next 24 hours.  Arthur will move over water where the Sea Surface Temperature is near 25°C.  An upper level trough over the eastern Gulf of Mexico and an upper level ridge east of Florida will interact to produce southerly winds which will blow toward the top of the circulation.  Those winds will cause some vertical wind shear but the shear will not be strong enough to prevent intensification.  Tropical Storm Arthur will strengthen on Sunday.

The upper level trough and upper level ridge will steer Tropical Storm Arthur toward the north-northeast during the next 36 to 48 hours.  On its anticipated track Tropical Storm Arthur will approach the coast of North Carolina on Monday.  It will bring gusty winds and heavy rain to parts of the coast.  Wind blowing water toward the coast will cause the water level to rise and there will be erosion of the beaches.

Tropical Depression One Forms East of Florida

Tropical Depression One formed east of Florida on Saturday.  At 5:00 p.m. EDT on Saturday the center of Tropical Depression One was located at latitude 28.4°N and longitude 78.6°W which put it about 125 miles (200 km) east of Melbourne, Florida.  The depression was moving toward the north-northeast at 13 m.p.h. (20 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 1008 mb.

A Tropical Storm Watch was issued for the portion of the coast from Surf City to Duck, North Carolina including Pamlico and Albemarle Sounds.

Surface observations and data from aircraft reconnaissance indicated that a distinct low pressure system formed east of Florida on Saturday and the National Hurricane Center designated the system as Tropical Depression One.  More thunderstorms developed near the center of circulation.  Storms near the center began to generate upper level divergence which pumped mass away to the east of the depression.  The strongest winds were occurring in the inner part of the circulation, which was consistent with the typical structure of a tropical cyclone.  Bands of showers and thunderstorms were developing.  The strongest bands were in the eastern half of the circulation.

Tropical Depression One will move through an environment favorable for intensification during the next several days.  The depression will move over water where the Sea Surface Temperature is near 25°C.  An upper level trough over the eastern Gulf of Mexico and an upper level ridge east of Florida will interact to produce southerly winds which will blow toward the top of the circulation.  Those winds will cause some vertical wind shear but the shear will not be strong enough to prevent intensification.  Tropical Depression One will strengthen into a tropical storm.

The upper level trough and upper level ridge will steer Tropical Depression One toward the north-northeast during the next 36 to 48 hours.  On its anticipated track Tropical Depression One will approach the coast of North Carolina on Monday.  It will be a tropical storm by that time.  It will bring gusty winds and heavy rain to parts of the coast.  Wind blowing water toward the coast will cause the water level to rise and there will be erosion of the beaches.