Gabrielle (2007)

A low pressure area formed along the Georgia coast on September 3 and drifted eastward for several days. The system reorganized over the western Atlantic and became a subtropical storm at 0000 UTC on September 8 about 360 nautical miles southeast of Cape Hatteras, North Carolina. It transitioned to a tropical storm later that day, moved northwest toward eastern North Carolina, reached peak strength on September 9 just south-southeast of Cape Lookout, made two brief crossings of the coast, then moved back offshore and weakened to a tropical depression on September 10. The circulation dissipated by 1200 UTC on September 11 about 300 nautical miles south-southwest of Nova Scotia.

Gabrielle made landfall along the Cape Lookout National Seashore in eastern North Carolina on September 9 and exited the coast near Kill Devil Hills just after 0000 UTC on September 10. The center crossed the coast twice within about 12 hours; the strongest thunderstorm activity and highest winds remained mainly offshore during the initial landfall period.

The storm’s maximum sustained wind was 50 knots (about 58 mph) at 1200 UTC September 9, with a minimum central pressure of 1004 mb. That intensity corresponds to a moderate tropical storm (below hurricane strength). Aircraft measurements and a dropsonde supported the 50-kt peak after reducing flight-level winds to surface values.

Storm surge along Atlantic-facing beaches of Carteret, Hyde, and Dare counties was estimated at about 1 to 2 feet, with sound-side surge of 2 to 3 feet in parts of Dare County. Rainfall was concentrated in a small area of eastern North Carolina: 4 to 8 inches across southern Craven and eastern Carteret Counties, with a maximum reported amount of 9.03 inches near Harlowe in Carteret County. Many locations in Morehead City reported totals around 7 inches.

Impacts were generally minor. Surge and high tides over-washed Highway 12 in Dare County near Salvo and Rodanthe and produced some beach erosion on south-facing beaches of Carteret, Hyde, and southern Dare counties. A few streets in Morehead City and Beaufort were closed by heavy rain and several homes and businesses had minor flood damage. There were no reported casualties associated with Gabrielle.

Noteworthy items: forecasts anticipated the system’s formation several days in advance, and official NHC track forecasts were more accurate than average for the first 48 hours. Tropical storm warnings were issued in a timely manner (24 hours or more before landfall). The strongest measured winds from some ship reports were later judged likely too high.