Hurricane Isabel

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Hurricane Isabel
Category 5 major hurricane (SSHWS/NWS)
Hurricane Isabel 11 sept 2003 1415Z (Cropped).jpg
Hurricane Isabel near peak intensity northeast of the Leeward Islands, on September 11
FormedSeptember 6, 2003
DissipatedSeptember 20, 2003
( Extratropical after September 19)
Highest winds 1-minute sustained:165 mph (270 km/h)
Lowest pressure915 mbar (hPa); 27.02 inHg
Fatalities16 direct, 35 indirect
Damage$5.5 billion (2003 USD)
Areas affected Lesser Antilles, Puerto Rico, Greater Antilles, Turks and Caicos Islands, Bahamas, East coast of the United States, Atlantic Canada
Part of the 2003 Atlantic hurricane season
Part of a series on Hurricane Isabel

Hurricane Isabel was the deadliest, costliest, and most intense hurricane in the 2003 Atlantic hurricane season. The ninth named storm, fifth hurricane, and second major hurricane of the season, Isabel formed near the Cape Verde Islands from a tropical wave on September 6, in the tropical Atlantic Ocean. It moved northwestward, and within an environment of light wind shear and warm waters, it steadily strengthened to reach peak winds of 165 mph (270 km/h) on September 11. After fluctuating in intensity for four days, during which it displayed annular characteristics, Isabel gradually weakened and made landfall on the Outer Banks of North Carolina, with winds of 105 mph (165 km/h) on September 18. Isabel quickly weakened over land and became extratropical over western Pennsylvania on the next day. On September 20, the extratropical remnants of Isabel were absorbed into another system over Eastern Canada.

Tropical cyclone Is a rotating storm system

A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain. Depending on its location and strength, a tropical cyclone is referred to by different names, including hurricane, typhoon, tropical storm, cyclonic storm, tropical depression, and simply cyclone. A hurricane is a tropical cyclone that occurs in the Atlantic Ocean and northeastern Pacific Ocean, and a typhoon occurs in the northwestern Pacific Ocean; in the south Pacific or Indian Ocean, comparable storms are referred to simply as "tropical cyclones" or "severe cyclonic storms".

2003 Atlantic hurricane season Summary of the relevant tropical storms

The 2003 Atlantic hurricane season was a very active Atlantic hurricane season with tropical activity before and after the official bounds of the season—the first such occurrence since the 1964 season. The season produced 21 tropical cyclones, of which 16 developed into named storms; seven cyclones attained hurricane status, of which three reached major hurricane status. With sixteen storms, the season was tied for the sixth-most active Atlantic hurricane season on record. The strongest hurricane of the season was Hurricane Isabel, which reached Category 5 status on the Saffir–Simpson hurricane scale northeast of the Lesser Antilles; Isabel later struck North Carolina as a Category 2 hurricane, causing $5.5 billion in damage and a total of 51 deaths across the Mid-Atlantic region of the United States.

Atlantic hurricane season tropical cyclone season

The Atlantic hurricane season is the period in a year when hurricanes usually form in the Atlantic Ocean. Tropical cyclones in the North Atlantic are called hurricanes, tropical storms, or tropical depressions. In addition, there have been several storms over the years that have not been fully tropical and are categorized as subtropical depressions and subtropical storms. Even though subtropical storms and subtropical depressions are not technically as strong as tropical cyclones, the damages can still be devastating.

Contents

In North Carolina, the storm surge from Isabel washed out a portion of Hatteras Island to form what was unofficially known as Isabel Inlet. Damage was greatest along the Outer Banks, where thousands of homes were damaged or even destroyed. The worst of the effects of Isabel occurred in Virginia, especially in the Hampton Roads area and along the shores of rivers as far west and north as Richmond and Baltimore. Virginia reported the most deaths and damage from the hurricane. About 64% of the damage and 69% of the deaths occurred in North Carolina and Virginia. Electric service was disrupted in areas of Virginia for several days, some more rural areas were without electricity for weeks, and local flooding caused thousands of dollars in damage.

Hatteras Island island in North Carolina, United States of America

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 communities of Rodanthe, Waves, Salvo, Avon, Buxton, Frisco, and Hatteras. It contains the largest part of the Cape Hatteras National Seashore. It is almost entirely in Dare County, North Carolina, but there is a very small sliver of about 45 acres (0.18 km2) which extends southwest into Hyde County.

Virginia State of the United States of America

Virginia, officially the Commonwealth of Virginia, is a state in the Southeastern and Mid-Atlantic regions of the United States located between the Atlantic Coast and the Appalachian Mountains. Virginia is nicknamed the "Old Dominion" due to its status as the first English colonial possession established in mainland North America and "Mother of Presidents" because eight U.S. presidents were born there, more than any other state. The geography and climate of the Commonwealth are shaped by the Blue Ridge Mountains and the Chesapeake Bay, which provide habitat for much of its flora and fauna. The capital of the Commonwealth is Richmond; Virginia Beach is the most populous city, and Fairfax County is the most populous political subdivision. The Commonwealth's estimated population as of 2018 is over 8.5 million.

Hampton Roads Metropolitan area in the United States

Hampton Roads is the name of both a body of water that serves as a wide channel for the James, Nansemond and Elizabeth rivers between Old Point Comfort and Sewell's Point where the Chesapeake Bay flows into the Atlantic Ocean and the surrounding metropolitan region located in the Southeastern Virginia and Northeastern North Carolina portions of the Tidewater region.

Moderate to severe damage extended up the Atlantic coastline and as far inland as West Virginia. Roughly six million people were left without electric service in the eastern United States from the strong winds of Isabel. Rainfall from the storm extended from South Carolina to Maine, and westward to Michigan. Throughout the path of Isabel, damage totalled about $5.5 billion (2003 USD). 16 deaths in seven U.S. states were directly related to the hurricane, with 35 deaths in six states and one Canadian province indirectly related to the hurricane.

West Virginia State of the United States of America

West Virginia is a state located in the Appalachian region in the Southern United States that is also considered to be a part of the Middle Atlantic States. It is bordered by Pennsylvania to the north, Maryland to the east and northeast, Virginia to the southeast, Kentucky to the southwest, and Ohio to the northwest. West Virginia is the 41st largest state by area, and is ranked 38th in population. The capital and largest city is Charleston.

South Carolina State of the United States of America

South Carolina is a state in the Southeastern United States and the easternmost of the Deep South. It is bordered to the north by North Carolina, to the southeast by the Atlantic Ocean, and to the southwest by Georgia across the Savannah River.

Maine State of the United States of America

Maine is a state in the New England region of the northeastern United States. Maine is the 12th smallest by area, the 9th least populous, and the 38th most densely populated of the 50 U.S. states. It is bordered by New Hampshire to the west, the Atlantic Ocean to the southeast, and the Canadian provinces of New Brunswick and Quebec to the northeast and northwest respectively. Maine is the easternmost state in the contiguous United States, and the northernmost state east of the Great Lakes. It is known for its jagged, rocky coastline; low, rolling mountains; heavily forested interior; and picturesque waterways, as well as its seafood cuisine, especially lobster and clams. There is a humid continental climate throughout most of the state, including in coastal areas such as its most populous city of Portland. The capital is Augusta.

Meteorological history

Map plotting the track and the intensity of the storm, according to the Saffir-Simpson scale Isabel 2003 track.png
Map plotting the track and the intensity of the storm, according to the Saffir–Simpson scale

A tropical wave moved off the western coast of Africa on September 1. [1] An area of low pressure associated with the wave moved slowly westward, and its convection initially appeared to become better organized. [2] On September 3, as it passed to the south of the Cape Verde islands, organization within the system degraded, [3] though convection increased the next day. [4] The system gradually became better organized, and Dvorak classifications began early on September 5. Based on the development of a closed surface circulation, it is estimated the system developed into Tropical Depression Thirteen early on September 6. Hours later, it intensified into Tropical Storm Isabel, [1] though operationally the National Hurricane Center did not begin issuing advisories until 13 hours after it first developed. [5]

Tropical wave type of atmospheric trough

Tropical waves, easterly waves, or tropical easterly waves, also known as African easterly waves in the Atlantic region, are a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which moves from east to west across the tropics, causing areas of cloudiness and thunderstorms. West-moving waves can also form from the tail end of frontal zones in the subtropics and tropics, and may be referred to as easterly waves, but these waves are not properly called tropical waves; they are a form of inverted trough sharing many characteristics with fully tropical waves. All tropical waves form in the easterly flow along the equatorward side of the subtropical ridge or belt of high pressure which lies north and south of the Intertropical Convergence Zone (ITCZ). Tropical waves are generally carried westward by the prevailing easterly winds along the tropics and subtropics near the equator. They can lead to the formation of tropical cyclones in the north Atlantic and northeastern Pacific basins. A tropical wave study is aided by Hovmöller diagrams, a graph of meteorological data.

Africa The second largest and second most-populous continent, mostly in the Northern and Eastern Hemispheres

Africa is the world's second largest and second most-populous continent, being behind Asia in both categories. At about 30.3 million km2 including adjacent islands, it covers 6% of Earth's total surface area and 20% of its land area. With 1.2 billion people as of 2016, it accounts for about 16% of the world's human population. The continent is surrounded by the Mediterranean Sea to the north, the Isthmus of Suez and the Red Sea to the northeast, the Indian Ocean to the southeast and the Atlantic Ocean to the west. The continent includes Madagascar and various archipelagos. It contains 54 fully recognised sovereign states (countries), nine territories and two de facto independent states with limited or no recognition. The majority of the continent and its countries are in the Northern Hemisphere, with a substantial portion and number of countries in the Southern Hemisphere.

Low-pressure area region where the atmospheric pressure is lower than that of surrounding locations

A low-pressure area, low, depression or cyclone is a region on the topographic map where the atmospheric pressure is lower than that of surrounding locations. Low-pressure systems form under areas of wind divergence that occur in the upper levels of the troposphere. The formation process of a low-pressure area is known as cyclogenesis. Within the field of meteorology, atmospheric divergence aloft occurs in two areas. The first area is on the east side of upper troughs, which form half of a Rossby wave within the Westerlies. A second area of wind divergence aloft occurs ahead of embedded shortwave troughs, which are of smaller wavelength. Diverging winds aloft ahead of these troughs cause atmospheric lift within the troposphere below, which lowers surface pressures as upward motion partially counteracts the force of gravity.

Located within an area of light wind shear and warm waters, Isabel gradually organized as curved bands developed around a circular area of deep convection near the center. [6] It steadily strengthened as it moved to the west-northwest, and Isabel strengthened to a hurricane on September 7 subsequent to the development of a large, yet ragged eye located near the deepest convection. [7] The eye, overall convective pattern, and outflow steadily improved in organization, [8] and deep convection quickly surrounded the 40-mile (60 km)-wide eye. [9] Isabel intensified on September 8 to reach major hurricane status while located 1,300 miles (2,100 km) east-northeast of Barbuda. On September 9, Isabel reached an initial peak intensity of 135 mph (215 km/h) for around 24 hours, a minimal Category 4 hurricane on the Saffir–Simpson Hurricane Scale. [1]

Wind shear

Wind shear, sometimes referred to as wind gradient, is a difference in wind speed or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizontal wind shear. Vertical wind shear is a change in wind speed or direction with change in altitude. Horizontal wind shear is a change in wind speed with change in lateral position for a given altitude.

Eye (cyclone) region of mostly calm weather at the center of strong tropical cyclones

The eye is a region of mostly calm weather at the center of strong tropical cyclones. The eye of a storm is a roughly circular area, typically 30–65 km (20–40 miles) in diameter. It is surrounded by the eyewall, a ring of towering thunderstorms where the most severe weather and highest winds occur. The cyclone's lowest barometric pressure occurs in the eye and can be as much as 15 percent lower than the pressure outside the storm.

Barbuda island in Antigua and Barbuda

Barbuda is a small island located in the eastern Caribbean forming part of the sovereign Commonwealth nation of Antigua and Barbuda. It is located north of the Antigua Island and is part of the Leeward Islands of the West Indies. Antigua and Barbuda became a sovereign nation on the 1st of November 1981 but remained part of the British Commonwealth and its constitutional monarchy. The island is a popular tourist destination because of its moderate climate and coastline.

The eye of Hurricane Isabel as seen from the International Space Station Hurricane Isabel eye from ISS (edit 1).jpg
The eye of Hurricane Isabel as seen from the International Space Station
Hurricane Isabel displaying annular characteristics on September 14, as a powerful Category 5 hurricane Hurricane isabel2 2003.jpg
Hurricane Isabel displaying annular characteristics on September 14, as a powerful Category 5 hurricane
Broader view from the International Space Station Hurricane Isabel from ISS.jpg
Broader view from the International Space Station

Early on September 10, the eyewall became less defined, the convection near the eye became eroded, and northeasterly outflow became slightly restricted. [10] As a result, Isabel weakened slightly to a Category 3 hurricane. The hurricane turned more to the west due to the influence of the Bermuda-Azores High. [1] Later on September 10, Isabel restrengthened to a Category 4 hurricane after convection deepened near the increasingly organizing eyewall. [11] The hurricane continued to intensify, and Isabel reached its peak intensity of 165 mph (270 km/h) on September 11, a Category 5 hurricane on the Saffir–Simpson Hurricane Scale. [1] Due to an eyewall replacement cycle, Isabel weakened slightly, though it retained Category 5 status for 24 hours. [12] As Isabel underwent another eyewall replacement cycle, outflow degraded in appearance and convection around the eye weakened, [13] and early on September 13, Isabel weakened to a strong Category 4 hurricane. A weakness in the ridge to its north allowed the hurricane to turn to the west-northwest. [1] After completing the replacement cycle, the hurricane's large 40 mile (65 km) wide eye became better defined, [14] and late on September 13, Isabel re-attained Category 5 status. [1] During this time, Isabel attained annular characteristics, becoming highly symmetrical in shape and sporting a wide eye. [1] A NOAA Hurricane Hunter Reconnaissance Aircraft flying into the hurricane launched a dropsonde which measured an instantaneous wind speed of 233 mph (375 km/h), the strongest instantaneous wind speed recorded in an Atlantic hurricane. [15] Cloud tops warmed again shortly thereafter, [16] and Isabel weakened to a strong Category 4 hurricane early on September 14. Later that day, it re-organized, and for the third time, Isabel attained Category 5 status while located 400 miles (650 km) north of San Juan, Puerto Rico. [1]

Eyewall replacement cycle

Eyewall replacement cycles, also called concentric eyewall cycles, naturally occur in intense tropical cyclones, generally with winds greater than 185 km/h (115 mph), or major hurricanes. When tropical cyclones reach this intensity, and the eyewall contracts or is already sufficiently small, some of the outer rainbands may strengthen and organize into a ring of thunderstorms—an outer eyewall—that slowly moves inward and robs the inner eyewall of its needed moisture and angular momentum. Since the strongest winds are in a cyclone's eyewall, the tropical cyclone usually weakens during this phase, as the inner wall is "choked" by the outer wall. Eventually the outer eyewall replaces the inner one completely, and the storm may re-intensify.

Annular tropical cyclone

An annular tropical cyclone is a tropical cyclone that features a normal to large, symmetric eye surrounded by a thick and uniform ring of intense convection, often having a relative lack of discrete rainbands, and bearing a symmetric appearance in general. As a result, the appearance of an annular tropical cyclone can be referred to as akin to a tire or doughnut. Annular characteristics can be attained as tropical cyclones intensify; however, outside the processes that drive the transition from asymmetric systems to annular systems and the abnormal resistance to negative environmental factors found in storms with annular features, annular tropical cyclones behave similarly to asymmetric storms. Most research related to annular tropical cyclones is limited to satellite imagery and aircraft reconnaissance as the conditions thought to give rise to annular characteristics normally occur over water well removed from landmasses where surface observations are possible.

NOAA Hurricane Hunters

The NOAA Hurricane Hunters are a group of aircraft used for hurricane reconnaissance by the United States National Oceanic and Atmospheric Administration (NOAA). They fly through hurricanes to help forecasters and scientists gather operational and research data. The crews also conduct other research projects including ocean wind studies, winter storm research, thunderstorm research, coastal erosion, and air chemistry flights.

Cloud tops around the center warmed again early on September 15, and Isabel weakened to a Category 4 hurricane. [1] Later that day, the inner core of deep convection began to deteriorate, while the eye decayed in appearance. As a ridge to its northwest built southeastward, it resulted in Isabel decelerating as it turned to the north-northwest. [17] Increasing vertical wind shear contributed in weakening the hurricane further, and Isabel weakened to a Category 2 hurricane on September 16, while located 645 miles (1035 km) southeast of Cape Hatteras, North Carolina. [1] Convection remained minimal, though outflow retained excellent organization, [18] and Isabel remained a Category 2 hurricane for two days, until it made landfall between Cape Lookout and Ocracoke Island on September 18, with winds of 105 mph (165 km/h). The system weakened after it made landfall, though due to its fast forward motion, Isabel remained a hurricane until it reached western Virginia, early on September 19. After passing through West Virginia as a tropical storm, Isabel became extratropical over Western Pennsylvania, near Pittsburgh. The system continued turned northward, and crossed Lake Erie into Canada. Early on September 20, the extratropical remnant of Isabel was absorbed by a larger extratropical storm, over the Cochrane District of Ontario. [1]

Preparations

Hurricane Isabel making landfall in North Carolina on September 18 Hurricane Isabel 18 sept 2003 1555Z.jpg
Hurricane Isabel making landfall in North Carolina on September 18

Two days before Isabel made landfall, the National Hurricane Center issued a hurricane watch from Little River, South Carolina to Chincoteague, Virginia, including the Pamlico and Albemarle Sounds and the lower Chesapeake Bay. The NHC also issued a tropical storm watch south of Little River, South Carolina to the mouth of the Santee River, as well as from Chincoteague, Virginia northward to Little Egg Inlet, New Jersey. Hurricane and tropical storm warnings were gradually issued for portions of the East Coast of the United States. By the time Isabel made landfall, a tropical storm warning existed from Chincoteague, Virginia to Fire Island, New York and from Cape Fear, North Carolina to the mouth of the Santee River in South Carolina, and a hurricane warning existed from Chincoteague, Virginia to Cape Fear. Landfall forecasts were very accurate; from three days prior, the average track forecast error for its landfall was only 36 miles (58 km), and for 48 hours in advance the average track error was 18 miles (29 km). [1]

Officials declared mandatory evacuations for 24 counties in North Carolina, Virginia, and Maryland, though in general not many left. According to a survey conducted by the United States Department of Commerce, evacuation rates were estimated as follows; 45% in the Outer Banks, 23% in the area around the Pamlico Sound, 23% in Virginia, and about 15% in Maryland. [19] The threat of Isabel resulted in the evacuation of hundreds of thousands of residents, primarily in North Carolina and Virginia, and included more than 12,000 residents staying in emergency shelters. [20]

19 major airports along the East Coast of the United States were closed, with more than 1,500 flights canceled. The Washington Metro and Metrobus system closed prior to the arrival of the storm, and Amtrak canceled nearly all trains south of the nation's capital. Schools and businesses throughout its path closed prior to Isabel's arrival to allow time to prepare; hardware and home improvement stores reported brisk business of plywood, flashlights, batteries, and portable generators, as residents prepared for the storm's potential impact. The federal government was closed excluding emergency staff members. [20] The United States Navy ordered the removal of 40 ships and submarines and dozens of aircraft from naval sites near Norfolk, Virginia. [21]

A contingency plan was established at the Tomb of the Unknowns at Arlington National Cemetery that, should the winds exceed 120 mph (190 km/h), the guards could take positions in the trophy room (above the Tomb Plaza and providing continual sight of the Tomb) but the plan was never implemented. However, it spawned an urban legend that the Third Infantry sent orders to seek shelter, orders that were deliberately disobeyed. [22]

On September 18, the Canadian Hurricane Centre issued heavy rainfall and wind warnings for portions of southern Ontario. A gale warning was also issued for Lake Ontario, eastern Lake Erie, the Saint Lawrence River and Georgian Bay. [23] [24] [25] A news report on September 14 warned conditions could be similar to the disaster caused by Hurricane Hazel 49 years prior, resulting in widespread media coverage on the hurricane. [26] Researchers on a Convair 580 flight studied the structure of Isabel transitioning into an extratropical storm, after two similar studies for Hurricane Michael in 2000 and Tropical Storm Karen in 2001. While flying in a thunderstorm, ice accumulation forced the plane to descend. [27]

Impact

Deaths and damage by region
RegionDeathsDamage
(2003 USD)
DirectIndirect
Florida 100
North Carolina 12$450 million
Virginia 1022>$1.85 billion
West Virginia 00$20 million
Washington, D.C. 01$125 million
Maryland 16$820 million
Delaware 00$40 million
Pennsylvania 02$160 million
New Jersey 11$50 million
New York 10$90 million
Rhode Island 100
Ontario 01Unknown
Total1635$5.5 billion

Strong winds from Isabel extended from North Carolina to New England and westward to West Virginia. The winds, combined with previous rainfall which moistened the soil, downed many trees and power lines across its path, leaving about 6 million electricity customers without power at some point. Parts of coastal Virginia, especially in the Hampton Roads and Northeast North Carolina areas, were without electricity for almost a month. Coastal areas suffered from waves and its powerful storm surge, with areas in eastern North Carolina and southeast Virginia reporting severe damage from both winds and the storm surge. Throughout its path, Isabel resulted in $5.5 billion in damage (2003 USD) and 51 deaths, of which 16 were directly related to the storm's effects. [28] [29]

The governors of Pennsylvania, West Virginia, Maryland, New Jersey, and Delaware declared states of emergency. [20] Isabel was the first major hurricane to threaten the Mid-Atlantic States and the Upper South since Hurricane Floyd in September 1999. Isabel's greatest effect was due to flood damage, the worst in some areas of Virginia since 1972's Hurricane Agnes. More than 60 million people were affected to some degree—a similar number to Floyd but more than any other hurricane in recent memory. [30]

Caribbean and Southeast United States

Rainfall totals from Hurricane Isabel Isabel 2003 rainfall.gif
Rainfall totals from Hurricane Isabel

Powerful surf affected the northern coastlines of the islands in the Greater Antilles. Strong swells also lashed the Bahamas. During most hurricanes, the location of the Bahamas prevents powerful swells of Atlantic hurricanes from striking southeast Florida. However, the combination of the location, forward speed, and strength of Isabel produced strong swells through the Providence Channel onto a narrow 10 mile (16 km) stretch of the southeastern Florida coastline; wave heights peaked at 14 feet (4.3 m) at Delray Beach. [15] The swells capsized a watercraft and injured its two passengers at Boynton Beach, and a swimmer required assistance to be rescued near Juno Beach. Minor beach erosion was reported in Palm Beach County. [31] In the northern portion of the state, waves reached up to 15 feet (4.5 m) in height at Flagler Beach, causing the Flagler Beach Pier to be closed due to damaged boards from the waves. [32] Rip currents from Isabel killed a surfer at an unguarded beach in Nassau County, with an additional six people requiring rescue from the currents. [33] The beaches were later closed during the worst of the rough surf. [34]

In northeastern South Carolina, the outer rainbands produced moderate winds reaching 45 mph (72 km/h) at Myrtle Beach. Rainfall was light, peaking at 1.34 inches (34 mm) in Loris. [35]

North Carolina

Isabel produced moderate to heavy damage across eastern North Carolina, totaling $450 million (2003  USD). [1] Damage was heaviest in Dare County, where storm surge flooding and strong winds damaged thousands of houses. [36] The storm surge produced a 2,000 foot (600 m) wide inlet on Hatteras Island, unofficially known as Isabel Inlet, isolating Hatteras by road for two months. [37] Strong winds downed hundreds of trees of across the state, leaving up to 700,000 residents without power. Most areas with power outages had power restored within a few days. [36] The hurricane directly killed one person and indirectly killed two in the state. [38]

Virginia

Flood waters at Langley AFB, Hampton, Virginia as a result of Hurricane Isabel Hurricane Isabel flood water.jpg
Flood waters at Langley AFB, Hampton, Virginia as a result of Hurricane Isabel

The storm surge assailed much of southeastern Virginia causing the worst flooding seen in the area since the 1933 Chesapeake–Potomac hurricane, peaking at an estimated 9 feet (2.7 m) in Richmond along the James River. The surge caused significant damage to homes along river ways, [39] especially along the middle reaches of the James River basin. [40] The strong storm surge surpassed the floodgate to the Midtown Tunnel while workers attempted to close the gate; about 44 million US gallons (170,000 m3) of water flooded the tunnel entirely in just 40 minutes, with the workers barely able to escape. [41] The damage to the electrical grid and flooding kept Old Dominion University, Norfolk State University, Virginia Commonwealth University and many of the region's other major educational institutions closed for almost a week. Further inland, heavy rainfall was reported, peaking at 20.2 inches (513 mm) in Sherando, Virginia, [40] causing damage and severe flash flooding. Winds from the hurricane destroyed over 1,000 houses and damaged 9,000 more; [42] damage in the state totaled over $1.85 billion (2003 USD), among the costliest tropical cyclones in Virginia history. [19] The passage of Isabel also resulted in 32 deaths in the state, 10 directly from the storm's effects and 22 indirectly related. [1]

Mid-Atlantic

About 1.24 million people lost power throughout Maryland and Washington, D.C. The worst of Isabel's effects came from its storm surge, which inundated areas along the coast and resulted in severe beach erosion. In Eastern Maryland, hundreds of buildings were damaged or destroyed by the storm surge and related tidal flooding. The most severe flooding occurred in the southern portions of Dorchester and Somerset counties and on Kent Island in Queen Anne's County. Thousands of houses were affected in Central Maryland, with severe storm surge flooding reported in Baltimore and Annapolis. Washington, D.C. sustained moderate damage, primarily from the winds. Throughout Maryland and Washington, damage totaled about $945 million (2003 USD), with only one direct fatality due to flooding. [43] [44] [45] [46]

The effects of the hurricane in Delaware were compounded by flooding caused by the remnants of Tropical Storm Henri days before. [47] Moderate winds of up to 62 mph (100 km/h) in Lewes [48] downed numerous trees, tree limbs, and power lines across the state, [49] leaving at least 15,300 without power. [50] Numerous low-lying areas were flooded due to high surf, strong storm surge, or run-off from flooding further inland. [49] The passage of Hurricane Isabel resulted in $40 million in damage (2003 USD) and no casualties in the state. [1]

Northeast United States

Hurricane Isabel's extratropical remnant over the Northeastern United States on September 19 Isabel 2003-09-19 1820Z.jpg
Hurricane Isabel's extratropical remnant over the Northeastern United States on September 19

The winds from Isabel downed hundreds of trees and power lines across New Jersey, leaving hundreds of thousands without power; a falling tree killed one person. Rough waves and a moderate storm surge along the coastline caused moderate to severe beach erosion, and one person was killed from the rough waves. Damage in the state totaled $50 million (2003 USD). [1] [51] [52]

The passage of Hurricane Isabel in Pennsylvania resulted in $160 million in damage (2003 USD) and 2 indirect deaths in Pennsylvania. [1] One person suffered from carbon monoxide poisoning, believed to be caused due to improperly ventilated generators in an area affected by the power outages. [53] Moderate winds left about 1.4 million customers without power across the state as a result of trees falling into power lines, with dozens of houses and cars damaged by the trees. [54] [55] [56]

Damage in New York totaled $90 million (2003 USD), [1] with Vermont reporting about $100,000 in damage (2003 USD). [57] [58] [59] [60] [61] [62] Falling trees from moderate winds downed power lines across the region, causing sporadic power outages. Two people died in the region as a result of the hurricane, both due to the rough surf from Isabel. [1]

Elsewhere

In West Virginia, the storm produced moderate rainfall across the state that peaked at 6.88 in (175 mm) near Sugar Grove. [63] The rainfall resulted in mudslides and flash flooding, covering several roads and washing away two bridges. The South Branch Potomac River crested at 24.7 feet (7.5 m), 9.3 feet (2.8 m) above flood state near Springfield. The flooding broke a levee at Michael Field, and in Mineral County one school and 14 basements were flooded. In Jefferson County, two people required rescue after a car drove into floodwaters. [64] Although sustained winds were weak in the state, wind gusts reached 46 mph (74 km/h) at Martinsburg. With the wet grounds, the wind gusts toppled thousands of trees, which fell onto homes, roads, and power lines. [64] About 1.4 million residents across the state were left without power. [65] Damage in the state totaled $20 million (2003 USD). No deaths were reported, [1] and three were injured from the hurricane. [64]

Isabel dropped light to moderate precipitation across the eastern half of Ohio, with isolated locations reporting over 3 in (75 mm). [40] Moisture from Isabel dropped light rainfall across eastern Michigan and peaked at 1.55 inches (39 mm) at Mount Clemens. Additionally, Doppler weather radar estimated rainfall approached 2.5 inches (64 mm) in St. Clair County. No damage was reported from Isabel in the region. [66]

Swells from Isabel produced moderate surf along the Atlantic coast of Nova Scotia, particularly in the Gulf of Maine. [23] Isabel also produced rough surf in Lake Ontario, with waves reaching 4 m (13 ft) along the western portion. At Hamilton, the waves surpassed seawalls and produced spray onto coastal streets. [27] Rainfall peaked at 59 mm (2.3 in), which caused minor flooding and led to one traffic fatality. About 27,000 people lost power, mostly near Toronto. [67] The strong pressure gradient between Isabel and a high pressure system over eastern Canada produced strong easterly winds across lakes Ontario and Erie. [27] A buoy in Lake Ontario reported a peak gust of 78 km/h (49 mph), [68] and gusts reached as strong as 81 km/h (51 mph) at Port Colborne, Ontario. [1]

Aftermath

Damage to the Barrier Islands after Hurricane Isabel (USGS) Hatteras Island damage by Hurricane Isabel.jpg
Damage to the Barrier Islands after Hurricane Isabel (USGS)

By about a week after the passage of the hurricane, President George W. Bush declared disaster areas for 36  North Carolina counties, 77  counties and independent cities in Virginia, the entire state of Maryland, all three counties in Delaware and six West Virginia counties. The disaster declaration allocated the use of federal funds for rebuilding and providing aid in the aftermath of hurricane Isabel. [19] By about four months after the passage of the hurricane, disaster aid totaled about $516 million (2003 USD), primarily in North Carolina and Virginia. Over 166,000 residents applied for individual assistance, with about $117 million (2003 USD) approved for residents to assist with temporary housing and home repairs. About 50,000 business owners applied for Small Business Administration loans, with about $178 million (2003 USD) approved for the assistance loans. About 40,000 people visited local disaster recovery centers, designed to provide additional information regarding the aftermath of the hurricane. [69] [70] [71] [72] [73]

In North Carolina, hundreds of residents were stranded in Hatteras following the formation of Isabel Inlet. [74] People who were not residents were not allowed to be on the Outer Banks for two weeks after the hurricane due to damaged road conditions. When visitors were allowed to return, many ventured to see the new inlet, despite a 1-mile (1.6-km) walk from the nearest road. [37] Initially, long term solutions to the Isabel Inlet such as building a bridge or a ferry system were considered, though they were ultimately canceled in favor of pumping sand and filling the inlet. Coastal geologists were opposed to the solution, stating the evolution of the Outer Banks is dependent on inlets from hurricanes. [75] Dredging operations began on October 17, about a month after the hurricane struck. The United States Geological Survey used sand from the ferry channel to the southwest of Hatteras Island, a choice made to minimize the impact to submerged aquatic vegetation and due to the channel being filled somewhat during the hurricane. [76] On November 22, about two months after the hurricane struck, North Carolina Highway 12 and Hatteras Island were reopened to public access. On the same day, the ferry between Hatteras and Ocracoke was reopened. [37]

In West Virginia, the power outages were restored within a week. [77] Power workers throughout Canada assisted the severely affected power companies from Maryland to North Carolina. [78] Hydro-Québec sent 25 teams to the New York City area to assist in power outages. [79]

Retirement

Because of widespread property damage and extensive death tolls the name Isabel was retired after the 2003 season, and will not be used for future Atlantic hurricanes. It was replaced by Ida for the naming list for the 2009 season. [80] The names Ina and Ivy were also suggested as possible replacement names. [81]

See also

Related Research Articles

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Tropical Storm Hanna (2002) Atlantic tropical storm in 2002

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Tropical Storm Bill (2003) Atlantic tropical storm in 2003

Tropical Storm Bill was a tropical storm that affected the Gulf Coast of the United States in the summer of 2003. The second storm of the 2003 Atlantic hurricane season, Bill developed from a tropical wave on June 29 to the north of the Yucatán Peninsula. It slowly organized as it moved northward, and reached a peak of 60 miles per hour (97 km/h) shortly before making landfall in south-central Louisiana. Bill quickly weakened over land, and as it accelerated to the northeast, moisture from the storm, combined with cold air from an approaching cold front, produced an outbreak of 34 tornadoes. Bill became extratropical on July 2, and was absorbed by the cold front later that day.

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Tropical Storm Grace (2003) Atlantic tropical storm in 2003

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Effects of Hurricane Isabel in North Carolina Impact and aftermath of 2003 Atlantic hurricane

Hurricane Isabel of the 2003 Atlantic hurricane season produced moderate to heavy damage across eastern North Carolina, United States. Isabel formed from a tropical wave on September 6, 2003, in the tropical Atlantic Ocean. It moved northwestward, and within an environment of light wind shear and warm waters it steadily strengthened to reach peak winds of 165 mph (265 km/h) on September 11. After fluctuating in intensity for four days, Isabel gradually weakened and made landfall on the Outer Banks of North Carolina with winds of 105 mph (165 km/h) on September 18. It quickly weakened over land and became extratropical over western Pennsylvania the next day.

Effects of Hurricane Isabel in Delaware

The effects of Hurricane Isabel in Delaware resulted in one of only thirteen presidential disaster declarations for the state of Delaware. Hurricane Isabel formed from a tropical wave on September 6, 2003 in the tropical Atlantic Ocean. It moved northwestward, and within an environment of light wind shear and warm waters it steadily strengthened to reach peak winds of 165 mph (265 km/h) on September 11. After fluctuating in intensity for four days, Isabel gradually weakened and made landfall on the Outer Banks of North Carolina with winds of 105 mph (165 km/h) on September 18. It quickly weakened over land and became extratropical over Pennsylvania the next day. The storm's center remained to the south and west of Delaware, and was about 175 miles (280 km) from Delaware at its closest approach. At that time, Isabel was a strong tropical storm located in central Virginia.

Effects of Hurricane Isabel in Maryland and Washington, D.C.

The effects of Hurricane Isabel in Maryland and Washington, D.C., were among the most damaging from a tropical cyclone in the Baltimore-Washington Metropolitan Area, United States. Hurricane Isabel formed from a tropical wave on September 6, 2003, in the tropical Atlantic Ocean. It moved northwestward, and within an environment of light wind shear and warm waters, it steadily strengthened to reach peak winds of 165 mph (265 km/h) on September 11. After fluctuating in intensity for four days, Isabel gradually weakened and made landfall on the Outer Banks of North Carolina with winds of 105 mph (165 km/h) on September 18. It quickly weakened over land and became extratropical over western Pennsylvania the next day.

Effects of Hurricane Isabel in Virginia

The effects of Hurricane Isabel in Virginia proved to be the costliest disaster in the history of Virginia. Hurricane Isabel formed from a tropical wave on September 6, 2003 in the tropical Atlantic Ocean. It moved northwestward, and within an environment of light wind shear and warm waters it steadily strengthened to reach peak winds of 265 km/h (165 mph) on September 11. After fluctuating in intensity for four days, Isabel gradually weakened and made landfall on the Outer Banks of North Carolina with winds of 165 km/h (105 mph) on September 18. It quickly weakened over land as it passed through central Virginia, and Isabel became extratropical over western Pennsylvania on September 19.

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