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.