Tropical Storm Gabrielle (2007)
Encyclopedia
Tropical Storm Gabrielle was a short-lived tropical cyclone
Tropical cyclone
A tropical cyclone is a storm system characterized by a large low-pressure center and numerous thunderstorms that produce strong winds and heavy rain. Tropical cyclones strengthen when water evaporated from the ocean is released as the saturated air rises, resulting in condensation of water vapor...

 that passed over North Carolina
North Carolina
North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...

 before tracking out to sea. The seventh named storm of the 2007 Atlantic hurricane season
2007 Atlantic hurricane season
The 2007 Atlantic hurricane season was an active Atlantic hurricane season that produced 17 tropical cyclones, 15 tropical storms, six hurricanes, and two major hurricanes. It officially started on June 1 and ended on November 30, dates which conventionally delimit the...

, Gabrielle developed as a subtropical cyclone
Subtropical cyclone
A subtropical cyclone is a weather system that has some characteristics of a tropical and an extratropical cyclone. As early as the 1950s, meteorologists were unclear whether they should be characterized as tropical or extratropical cyclones. They were officially recognized by the National...

 on September 8 about 385 miles (625 km) southeast of Cape Lookout, North Carolina. Unfavorable wind shear
Wind shear
Wind shear, sometimes referred to as windshear or wind gradient, is a difference in wind speed and direction over a relatively short distance in the atmosphere...

 impacted the storm for much of its duration, although a temporary decrease in the shear allowed the cyclone to become a tropical storm. On September 9, Gabrielle made landfall
Landfall (meteorology)
Landfall is the event of a tropical cyclone or a waterspout coming onto land after being over water. When a waterspout makes landfall it is reclassified as a tornado, which can then cause damage inland...

 at Cape Lookout National Seashore
Cape Lookout National Seashore
Cape Lookout National Seashore preserves a 56-mile long section of the Southern Outer Banks, or Crystal Coast, of North Carolina, USA, running from Ocracoke Inlet on the northeast to Beaufort Inlet on the southeast. Three undeveloped barrier islands make up the seashore - North Core Banks, South...

 in the Outer Banks
Outer Banks
The Outer Banks is a 200-mile long string of narrow barrier islands off the coast of North Carolina, beginning in the southeastern corner of Virginia Beach on the east coast of the United States....

 of North Carolina
North Carolina
North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...

 with winds of 60 mph (90 km/h). Turning to the northeast, the storm quickly weakened and dissipated on September 11.

In advance of the storm, tropical cyclone watches and warnings were issued for coastal areas, while rescue teams and the U.S. Coast Guard were put on standby. The storm dropped heavy rainfall near its immediate landfall location but little precipitation elsewhere. Along the coast of North Carolina, high waves, rip current
Rip current
A rip current, commonly referred to by the misnomer rip tide, is a strong channel of water flowing seaward from near the shore, typically through the surf line. Typical flow is at 0.5 metres per second , and can be as fast as 2.5 metres per second...

s, and storm surge
Storm surge
A storm surge is an offshore rise of water associated with a low pressure weather system, typically tropical cyclones and strong extratropical cyclones. Storm surges are caused primarily by high winds pushing on the ocean's surface. The wind causes the water to pile up higher than the ordinary sea...

 were reported. Slight localized flooding was reported. Gusty winds also occurred, though no wind damage was reported. Along the coast of Florida, rough surf drowned one person. Overall damage was minor.

Meteorological history

A cold front
Cold front
A cold front is defined as the leading edge of a cooler mass of air, replacing a warmer mass of air.-Development of cold front:The cooler and denser air wedges under the less-dense warmer air, lifting it...

 moved off the southeast coast
East Coast of the United States
The East Coast of the United States, also known as the Eastern Seaboard, refers to the easternmost coastal states in the United States, which touch the Atlantic Ocean and stretch up to Canada. The term includes the U.S...

 of the United States on September 1. Gradually decaying, the front degenerated into an area of cloudiness and showers just east of the Georgia
Georgia (U.S. state)
Georgia is a state located in the southeastern United States. It was established in 1732, the last of the original Thirteen Colonies. The state is named after King George II of Great Britain. Georgia was the fourth state to ratify the United States Constitution, on January 2, 1788...

 coast on September 2. Tracking eastward, a weak low pressure area
Low pressure area
A low-pressure area, or "low", is a region where the atmospheric pressure at sea level is below that of surrounding locations. Low-pressure systems form under areas of wind divergence which occur in upper levels of the troposphere. The formation process of a low-pressure area is known as...

 developed the next day. It slowly became better organized as its motion became erratic, and by late on September 4 the convection
Convection
Convection is the movement of molecules within fluids and rheids. It cannot take place in solids, since neither bulk current flows nor significant diffusion can take place in solids....

 had become concentrated to the east of the center. On September 5, a Hurricane Hunters
Hurricane Hunters
The Hurricane Hunters are aircraft that fly into tropical cyclones in the North Atlantic Ocean and Northeastern Pacific Ocean for the specific purpose of directly measuring weather data in and around those storms. In the United States, the Air Force, Navy, and NOAA units have all participated in...

 flight indicated the system had not acquired the characteristics of a tropical
Tropical cyclone
A tropical cyclone is a storm system characterized by a large low-pressure center and numerous thunderstorms that produce strong winds and heavy rain. Tropical cyclones strengthen when water evaporated from the ocean is released as the saturated air rises, resulting in condensation of water vapor...

 or subtropical cyclone
Subtropical cyclone
A subtropical cyclone is a weather system that has some characteristics of a tropical and an extratropical cyclone. As early as the 1950s, meteorologists were unclear whether they should be characterized as tropical or extratropical cyclones. They were officially recognized by the National...

. Interaction with an upper-level trough
Trough (meteorology)
A trough is an elongated region of relatively low atmospheric pressure, often associated with fronts.Unlike fronts, there is not a universal symbol for a trough on a weather chart. The weather charts in some countries or regions mark troughs by a line. In the United States, a trough may be marked...

 resulted in moderate wind shear
Wind shear
Wind shear, sometimes referred to as windshear or wind gradient, is a difference in wind speed and direction over a relatively short distance in the atmosphere...

 which suppressed further development, and by September 6 the thunderstorm activity lost much organization. Upper-level winds became increasingly favorable, allowing the convection to concentrate about halfway between North Carolina
North Carolina
North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...

 and Bermuda
Bermuda
Bermuda is a British overseas territory in the North Atlantic Ocean. Located off the east coast of the United States, its nearest landmass is Cape Hatteras, North Carolina, about to the west-northwest. It is about south of Halifax, Nova Scotia, Canada, and northeast of Miami, Florida...

. With a deep-layer ridge
Ridge (meteorology)
A ridge is an elongated region of relatively high atmospheric pressure, the opposite of a trough....

 to its north, the system turned to a steady west-northwest track. A reconnaissance aircraft flight late on September 7 reported a very elongated center, with peak flight winds of 55 mph (90 km/h) about 100 miles (160 km) northeast of the center. Subsequent to the flight, the center became slightly better organized, and based on the large wind field and the presence of an upper-level low to its west-southwest, the National Hurricane Center
National Hurricane Center
The National Hurricane Center , located at Florida International University in Miami, Florida, is the division of the National Weather Service responsible for tracking and predicting weather systems within the tropics between the Prime Meridian and the 140th meridian west poleward to the 30th...

 classified the system as Subtropical Storm Gabrielle early on September 8 while located about 385 miles (625 km) southeast of Cape Lookout, North Carolina.

Upon becoming a subtropical cyclone
Subtropical cyclone
A subtropical cyclone is a weather system that has some characteristics of a tropical and an extratropical cyclone. As early as the 1950s, meteorologists were unclear whether they should be characterized as tropical or extratropical cyclones. They were officially recognized by the National...

, Gabrielle was located in an area of cooler air to its north, dry air to its south and west, southerly wind shear, and cooler water temperatures along its path. Despite these unfavorable conditions, a curved convective band developed in its northern and western quadrants, and the circulation became better defined. Subsequently, the rainbands in its northeastern quadrant dissipated, leaving the well-defined center far removed from the convection. By later that day, the circulation began to become more involved with the remaining convection. Based on evidence of a weak warm-core, the system was re-designated as Tropical Storm Gabrielle late on September 8 about 185 miles (300 km) southeast of Cape Lookout, North Carolina.
Vertical wind shear decreased as the storm passed over the Gulf Stream
Gulf Stream
The Gulf Stream, together with its northern extension towards Europe, the North Atlantic Drift, is a powerful, warm, and swift Atlantic ocean current that originates at the tip of Florida, and follows the eastern coastlines of the United States and Newfoundland before crossing the Atlantic Ocean...

, allowing a strong convective burst to develop near the center. As it approached the coast of North Carolina
North Carolina
North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...

, the center re-developed within the deep convection underneath the mid-level circulation, although increased northerly wind shear displaced the center of Gabrielle to the north of the thunderstorm activity. Based on reports from Hurricane Hunters, it is estimated Gabrielle moved ashore at Cape Lookout National Seashore
Cape Lookout National Seashore
Cape Lookout National Seashore preserves a 56-mile long section of the Southern Outer Banks, or Crystal Coast, of North Carolina, USA, running from Ocracoke Inlet on the northeast to Beaufort Inlet on the southeast. Three undeveloped barrier islands make up the seashore - North Core Banks, South...

 at 1530 UTC
Coordinated Universal Time
Coordinated Universal Time is the primary time standard by which the world regulates clocks and time. It is one of several closely related successors to Greenwich Mean Time. Computer servers, online services and other entities that rely on having a universally accepted time use UTC for that purpose...

 on September 9 with winds of 60 mph (95 km/h), though due to the shear the strongest winds remained offshore. Tracking around the ridge over the western Atlantic, the storm turned to the north and north-northeast, emerging into the ocean near Kill Devil Hills, North Carolina
Kill Devil Hills, North Carolina
Kill Devil Hills is a town in Dare County, North Carolina, USA. The population was 5,897 at the 2000 census.Nearby Kitty Hawk is frequently cited as the location of the Wright brothers' first controlled, powered airplane flights on December 17, 1903...

 early on September 10 as a poorly organized system with convection far to the south of the center. Gabrielle weakened to a tropical depression shortly thereafter, and maintained scattered convection despite unfavorable wind shear as it tracked along the northern portion of the Gulf Stream. By midday on September 11, the circulation had become ill-defined and elongated; failing to meet the criteria of a tropical cyclone, the National Hurricane Center declared Gabrielle dissipating well to the south of Nova Scotia
Nova Scotia
Nova Scotia is one of Canada's three Maritime provinces and is the most populous province in Atlantic Canada. The name of the province is Latin for "New Scotland," but "Nova Scotia" is the recognized, English-language name of the province. The provincial capital is Halifax. Nova Scotia is the...

. By early the next day, the remnants of Gabrielle were absorbed by an approaching cold front
Cold front
A cold front is defined as the leading edge of a cooler mass of air, replacing a warmer mass of air.-Development of cold front:The cooler and denser air wedges under the less-dense warmer air, lifting it...

.

Preparations

Upon becoming a subtropical cyclone, the National Hurricane Center issued a tropical storm watch
Tropical cyclone warnings and watches
Warnings and watches are two levels of alert issued by national weather forecasting bodies to coastal areas threatened by the imminent approach of a tropical cyclone of tropical storm or hurricane intensity. They are notices to the local population and civil authorities to make appropriate...

 from Edisto Beach, South Carolina
Edisto Beach, South Carolina
Edisto Beach is a town in Colleton County, South Carolina, United States. The population was 641 at the 2000 census. The town limits include only the coastal area of Edisto Island .-History:Edisto Beach was originally settled by the Edisto Indians and was discovered...

 to Oregon Inlet
Oregon Inlet
Oregon Inlet is an inlet along North Carolina's Outer Banks. It joins the Pamlico Sound with the Atlantic Ocean and separates Bodie Island from Pea Island, which are connected by a 2.5 mile bridge that spans the inlet...

 in North Carolina
North Carolina
North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...

, including the Pamlico Sound
Pamlico Sound
Pamlico Sound in North Carolina, is the largest lagoon along the U.S. East Coast, being long and 24 to 48 km wide. It is a body of water separated from the Atlantic Ocean by the Outer Banks, a row of low, sandy barrier islands, including Cape Hatteras. The Neuse and Pamlico rivers flow in...

. As the storm approached the coast, the watch south of Cape Fear, North Carolina was discontinued, and a tropical storm warning
Tropical cyclone warnings and watches
Warnings and watches are two levels of alert issued by national weather forecasting bodies to coastal areas threatened by the imminent approach of a tropical cyclone of tropical storm or hurricane intensity. They are notices to the local population and civil authorities to make appropriate...

 was issued from Surf City, North Carolina
Surf City, North Carolina
Surf City is a town in Pender and Onslow counties in the U.S. state of North Carolina. The population was 2,057 at the 2008 census. It is located on Topsail Island....

 northward to the North Carolina–Virginia
Virginia
The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...

 state border; a watch was also issued northward to Cape Charles Light
Cape Charles Light
The current Cape Charles Light is a skeleton tower lighthouse at the mouth of the Chesapeake Bay on Smith Island. It is the tallest lighthouse in Virginia and the second tallest in the United States...

 on the Delmarva Peninsula
Delmarva Peninsula
The Delmarva Peninsula is a large peninsula on the East Coast of the United States, occupied by most of Delaware and portions of Maryland and Virginia...

, and to New Point Comfort
New Point Comfort
New Point Comfort is a point of land located in Mathews County at the tip of Virginia's Middle Peninsula in the lower Chesapeake Bay in the United States...

 on the western shore of the Chesapeake Bay
Chesapeake Bay
The Chesapeake Bay is the largest estuary in the United States. It lies off the Atlantic Ocean, surrounded by Maryland and Virginia. The Chesapeake Bay's drainage basin covers in the District of Columbia and parts of six states: New York, Pennsylvania, Delaware, Maryland, Virginia, and West...

, which was upgraded to a warning the next day.

Prior to the arrival of the storm, the National Park Service
National Park Service
The National Park Service is the U.S. federal agency that manages all national parks, many national monuments, and other conservation and historical properties with various title designations...

 closed visitor centers and campgrounds along the Outer Banks
Outer Banks
The Outer Banks is a 200-mile long string of narrow barrier islands off the coast of North Carolina, beginning in the southeastern corner of Virginia Beach on the east coast of the United States....

. For about 12 hours, the ferry between Hatteras
Hatteras, North Carolina
Hatteras is an unincorporated community in Dare County, North Carolina, United States, on the Outer Banks island of Hatteras. North Carolina Highway 12 passes through the community linking it to Frisco and Ocracoke . It is south of the famous Cape Hatteras and the Cape Hatteras Lighthouse in Buxton...

 and Ocracoke
Ocracoke, North Carolina
Ocracoke is a census-designated place and unincorporated town located at the southern end of Ocracoke Island, located entirely within Hyde County, North Carolina. The population was 769 as of the 2000 census...

 was closed. North Carolina Governor Mike Easley
Mike Easley
Michael Francis "Mike" Easley is an American politician who served as the 72nd Governor of the U.S. state of North Carolina, from 2001 to 2009. He is member of the North Carolina Democratic Party and became the first North Carolina governor to admit to a felony in a deal that halted a lengthy...

 put rescue teams and the National Guard on standby. Residents and tourists were advised to secure loose objects, and to remain indoors. As the storm's effects were expected to be minor, no evacuations were ordered. On Ocracoke Island, boats were hauled out. The threat of the storm forced the cancellation of a fishing tournament at Atlantic Beach
Atlantic Beach, North Carolina
-Demographics:As of the census of 2008, there were 1,815 people, 971 households, and 498 families residing in the town. The population density was . There were 4,728 housing units at an average density of 2,206.0 per square mile...

, which resulted in effects to the local economy.

Initially, uncertainty in Gabrielle's track led the National Hurricane Center's five-day track forecast cone
Track forecast cone
The track forecast cone is the name employed by the National Hurricane Center for the graphical representation of the uncertainty in its forecasts of a tropical cyclone's future location....

 to include the Mid-Atlantic, southeastern New York, and southern New England. Forecasters predicted rough surf and rip currents, prompting the Coast Guard
Coast guard
A coast guard or coastguard is a national organization responsible for various services at sea. However the term implies widely different responsibilities in different countries, from being a heavily armed military force with customs and security duties to being a volunteer organization tasked with...

 to perform preparations in the Northeastern United States. On Cape Cod
Cape Cod
Cape Cod, often referred to locally as simply the Cape, is a cape in the easternmost portion of the state of Massachusetts, in the Northeastern United States...

, Massachusetts
Massachusetts
The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...

, an HU-25 Falcon jet flew along the coastline, broadcasting storm advisories to offshore vessels. A Coast Guard patrol boat was deployed offshore for search and rescue. Boaters and mariners were advised to exercise caution, and were told to "make safe decisions". However, the storm passed well to the south with little effect.

Impact

Rough surf from Gabrielle along the coast of Florida
Florida
Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

 drowned one surfer and forced the rescue of 200 swimmers. Officials at New Smyrna Beach estimated 6 to 9 ft (1.8 to 2.7 m) seas. By early on September 9, the outer rainbands began affecting southeastern North Carolina
North Carolina
North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...

. Sustained winds of tropical storm force from the storm occurred along coastline, unofficially reaching 44 miles per hour (71 km/h) at Frisco
Frisco, North Carolina
Frisco is a small unincorporated community on the barrier island of Hatteras Island, between the villages of Buxton and Hatteras. It is located in Dare County, North Carolina, USA, and was previously named Trent, or Trent Woods, but received a new name with the coming of the post office in 1898...

. Wind gusts were stronger, unofficially reaching 61 miles per hour (98 km/h) at Ocracoke
Ocracoke, North Carolina
Ocracoke is a census-designated place and unincorporated town located at the southern end of Ocracoke Island, located entirely within Hyde County, North Carolina. The population was 769 as of the 2000 census...

. Along the coast, rough surf was reported, and waves reached 10 to 12 ft (3 to 3.7 m). Rip currents caused numerous swimmers to be rescued by lifeguards. Heavy rainfall from the storm was confined to near its immediate landfall location, peaking at 9.03 inches (229 mm) at a station 7.2 miles (12 km) to the east-northeast of Newport
Newport, North Carolina
Newport is a town in Carteret County, North Carolina, United States. The population was 3,349 at the 2000 census.-History:Newport was officially chartered in 1866. Although the crossroads community on the Newport River was known by that name decades earlier, the area was also known as Bell's Corner...

; other areas reported 4 to 8 in (0.1016 to 0.2032 m). Two offshore ships observed tropical storm-force winds, though the reports were considered to be over-estimated.

In some locations, the rainfall led to flooding, which prevented farmers from harvesting crops. Elsewhere throughout the state, the storm failed to relieve severe drought conditions as it was initially hoped to. The passage of the storm left a portion of North Carolina Highway 12 on Hatteras Island
Hatteras Island
Hatteras Island is a barrier island located off the North Carolina coast. Dividing the Atlantic Ocean and the Pamlico Sound, it runs parallel to the coast, forming a bend at Cape Hatteras. It is part of North Carolina's Outer Banks and includes the towns of Rodanthe, Waves, Salvo, Avon, Buxton,...

 closed for three hours, briefly flooding part of the road. Streets in Morehead City
Morehead City, North Carolina
Morehead City is a port city in Carteret County, North Carolina, United States. The population was 8,661 at the 2010 census. Morehead City celebrated the 150th anniversary of its founding on May 5, 2007...

 and Beaufort
Beaufort, North Carolina
Beaufort is a town in Carteret County, North Carolina, United States. Established in 1709, it is the third-oldest town in North Carolina.The population was 4,189 at the 2008 census and it is the county seat of Carteret County...

 were closed, and several homes and businesses suffered minor flood damage. In Carteret County
Carteret County, North Carolina
Carteret County is a county located in the U.S. state of North Carolina. As of 2010, the population was 66,469. Its county seat is Beaufort. Most of the county is part of the Crystal Coast....

, the flooding inflicted $5,000 (2007 USD) in property damage. Storm surge was fairly light along the coast, peaking at 3 foot (0.9144 m) above normal at Hatteras Island
Hatteras Island
Hatteras Island is a barrier island located off the North Carolina coast. Dividing the Atlantic Ocean and the Pamlico Sound, it runs parallel to the coast, forming a bend at Cape Hatteras. It is part of North Carolina's Outer Banks and includes the towns of Rodanthe, Waves, Salvo, Avon, Buxton,...

. Overall damage in the state was minor, including minor beach erosion and some flooded streets. No fatalities were reported.

See also

  • List of North Carolina hurricanes (2000-present)
  • Timeline of the 2007 Atlantic hurricane season
    Timeline of the 2007 Atlantic hurricane season
    This timeline documents all the storm formations, strengthening, weakening, landfalls, extratropical transitions, as well as dissipation during the 2007 Atlantic hurricane season. The season officially began on June 1, 2007, and ended on November 30, although Subtropical Storm Andrea and Tropical...

  • Other storms of the same name
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