Tropical Storm Henri (2003)
Encyclopedia
Tropical Storm Henri was weak a tropical storm that formed in the 2003 Atlantic hurricane season
2003 Atlantic hurricane season
The 2003 Atlantic hurricane season was an active Atlantic hurricane season with tropical activity before and after the official bounds of the season – the first such occurrence in 50 years. The season produced 21 tropical cyclones, of which 16 developed into named storms; seven...

. The eighth storm of the season, Henri was one of six tropical cyclones to hit the United States in the year. Henri formed from a tropical wave in the Gulf of Mexico
Gulf of Mexico
The Gulf of Mexico is a partially landlocked ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. In...

 in early September, and crossed over 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...

 as a tropical depression. Its remnants later moved into the Mid-Atlantic
Mid-Atlantic States
The Mid-Atlantic states, also called middle Atlantic states or simply the mid Atlantic, form a region of the United States generally located between New England and the South...

 before dissipating completely.

Henri caused little damage as a tropical cyclone. In Florida, it dropped heavy rainfall
Precipitation (meteorology)
In meteorology, precipitation In meteorology, precipitation In meteorology, precipitation (also known as one of the classes of hydrometeors, which are atmospheric water phenomena is any product of the condensation of atmospheric water vapor that falls under gravity. The main forms of precipitation...

, though damage was limited to minor flood
Flood
A flood is an overflow of an expanse of water that submerges land. The EU Floods directive defines a flood as a temporary covering by water of land not normally covered by water...

ing damage. In Delaware
Delaware
Delaware is a U.S. state located on the Atlantic Coast in the Mid-Atlantic region of the United States. It is bordered to the south and west by Maryland, and to the north by Pennsylvania...

 and Pennsylvania
Pennsylvania
The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...

, damage was greater, where heavy rainfall damaged hundreds of houses and businesses. The resulting floods in Delaware were described as a 1 in 500 year event
100-year flood
A one-hundred-year flood is calculated to be the level of flood water expected to be equaled or exceeded every 100 years on average. The 100-year flood is more accurately referred to as the 1% annual exceedance probability flood, since it is a flood that has a 1% chance of being equaled or exceeded...

. The total damage by Henri along its path amounted to $19.6 million (2003 USD
United States dollar
The United States dollar , also referred to as the American dollar, is the official currency of the United States of America. It is divided into 100 smaller units called cents or pennies....

, $21.5 million 2006 USD), but no deaths were reported.

Meteorological history

On August 22, a tropical wave
Tropical wave
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 move from east to west across the tropics causing areas of...

 moved off the coast of Africa, and it moved westward across the Atlantic Ocean
Atlantic Ocean
The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...

 and Caribbean Sea
Caribbean Sea
The Caribbean Sea is a sea of the Atlantic Ocean located in the tropics of the Western hemisphere. It is bounded by Mexico and Central America to the west and southwest, to the north by the Greater Antilles, and to the east by the Lesser Antilles....

 without developing significantly. On September 1 the wave axis entered the Gulf of Mexico
Gulf of Mexico
The Gulf of Mexico is a partially landlocked ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. In...

, and upon doing so 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....

 steadily organized around a low-level center of circulation. The system moved northward and developed into Tropical Depression Twelve on September 3 while located about 300 mile
Mile
A mile is a unit of length, most commonly 5,280 feet . The mile of 5,280 feet is sometimes called the statute mile or land mile to distinguish it from the nautical mile...

s (480 kilometers) west of Tampa, Florida
Tampa, Florida
Tampa is a city in the U.S. state of Florida. It serves as the county seat for Hillsborough County. Tampa is located on the west coast of Florida. The population of Tampa in 2010 was 335,709....

. Embedded within a slow mid-latitude
Latitude
In geography, the latitude of a location on the Earth is the angular distance of that location south or north of the Equator. The latitude is an angle, and is usually measured in degrees . The equator has a latitude of 0°, the North pole has a latitude of 90° north , and the South pole has a...

 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...

, the depression moved eastward and strengthened into Tropical Storm Henri on September 5.

Despite strong southwesterly vertical 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...

, Henri continued intensifying while moving eastward, and reached a peak strength of 60 mph (95 km/h) later on September 5. Shortly thereafter, though, the shear greatly weakened the storm, and it was downgraded to a tropical depression. Henri was not able to recover its intensity, and 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...

 near Clearwater, Florida
Clearwater, Florida
Clearwater is a city located in Pinellas County, Florida, US, nearly due west of Tampa and northwest of St. Petersburg. In the west of Clearwater lies the Gulf of Mexico and in the east lies Tampa Bay. As of the 2000 census, the city had a total population of 108,787. It is the county seat of...

 on September 6 as a 35 mph (55 km/h) tropical depression, and quickly crossed the state as it accelerated to the northeast. Despite initial predictions of re-intensification over open waters due to potentially lower shear, Henri failed to re-strengthen and degenerated into a remnant 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...

 on September 8 off 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 broad and disorganized remnant low remained nearly stationary due to a ridge
Ridge (meteorology)
A ridge is an elongated region of relatively high atmospheric pressure, the opposite of a trough....

 of high pressure to its north. Residual convection within the remnants of Henri remained disorganized, but forecasters kept watch for the potential for redevelopment. However, it moved inland near Cape Hatteras
Cape Hatteras
Cape Hatteras is a cape on the coast of North Carolina. It is the point that protrudes the farthest to the southeast along the northeast-to-southwest line of the Atlantic coast of North America...

 on September 12 without reorganizing. The remnants continued to the north and dissipated on September 17 over New England
New England
New England is a region in the northeastern corner of the United States consisting of the six states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, and Connecticut...

.

Preparations

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...

 issued 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...

 from Englewood
Englewood, Florida
Englewood is a census-designated place in Charlotte and Sarasota counties in the U.S. state of Florida. As of the 2000 census, it had a population of 16,196.Englewood also was the original name for Vineland, Florida...

 to Indian Pass, Florida
Indian Pass, Florida
Indian Pass is a small area on the south coast of Gulf County, Florida, 8 miles south of Port St. Joe. It promotes itself as an uncrowded haven for sports fisherman and water enthusiasts, and for dining featuring locally caught oysters. A ferry provides access to a wildlife sanctuary on St Vincent...

 while Henri was a tropical depression; however, warnings were discontinued by the time Henri made landfall. Flood warnings were issued across the state prior to the storm making landfall, with predictions of 5 to 10 inches (125 – 255 mm) of rainfall. As a result of the storm's approach, twelve shelters were placed on standby. Similarly, the Hurricane Shelter Information Hotline was placed on standby and ready to be activated within 10 minutes. Levy County
Levy County, Florida
Levy County is a county located in the state of Florida. As of 2000, the population was 34,450. The U.S. Census Bureau 2005 estimate for the county is 37,998. Its county seat is Bronson, Florida. Levy is pronounced lee vee.- History :...

 officials declared a state of emergency. There, sand bags and sand were sent to Cedar Key
Cedar Key, Florida
Cedar Key is a city in Levy County, Florida, United States. The population was 790 at the 2000 census. According to the U.S Census estimates of 2005, the city had a population of 958. The Cedar Keys are a cluster of islands close to the mainland. Most of the developed area of the city has been on...

, Yankeetown
Yankeetown, Florida
Yankeetown is a town in Levy County, Florida, United States. The population was 629 at the 2000 census. According to the U.S. Census Bureau's 2004 estimates, the town had a population of 672.-History:...

, and Inglis
Inglis, Florida
Inglis is a town located in Levy County, Florida, United States. It is located on U.S. Highway 19 near the Cross Florida Greenway. As of the 2000 census, the town had a total population of 1,491. As of 2004, the population recorded by the U.S...

 in anticipation for storm surge and flooding.

Impact

Henri dropped heavy rainfall along its path, with the worst of the flood
Flood
A flood is an overflow of an expanse of water that submerges land. The EU Floods directive defines a flood as a temporary covering by water of land not normally covered by water...

ing occurring in Delaware
Delaware
Delaware is a U.S. state located on the Atlantic Coast in the Mid-Atlantic region of the United States. It is bordered to the south and west by Maryland, and to the north by Pennsylvania...

. The storm caused $19.6 million in damage (2003 USD
United States dollar
The United States dollar , also referred to as the American dollar, is the official currency of the United States of America. It is divided into 100 smaller units called cents or pennies....

), primarily in Delaware.

Florida, Bahamas, and Bermuda

Prior to making landfall, the storm produced strong waves on the Florida west coast. Following a summer of tropical moisture in 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...

, Henri brought more heavy rainfall to the saturated state, peaking at 9.09 in (230 mm) in Hialeah
Hialeah, Florida
Hialeah is a city in Miami-Dade County, Florida, United States. As of the 2000 census, the city population was 226,419. As of 2009, the population estimate by the U. S...

 in the southeast portion of the state. Two other areas experienced over 7 in (180 mm), though most areas received only light rainfall. In Hernando County
Hernando County, Florida
Hernando County is a county located in the U.S. state of Florida. As of 2000, the population was 130,802. The U.S. Census Bureau 2006 estimate for the county is 165,409 . Its county seat is Brooksville, Florida. The majority of the county's population is in Spring Hill, west portion of Hernando...

, a stationary thunderstorm dropped over 5 in (125 mm) of rain in around an hour. It caused a rapid flooding of roads, though quickly retreated. Damage was minor, due to lack of many homes in the area. A feeder band in Charlotte County
Charlotte County, Florida
Charlotte County is a county located in the U.S. state of Florida. As of 2000, the population was 141,627. In 2005, the population of the MSA was 154,030.The U.S. Census Bureau 2007 estimate for the county was 152,814...

 dropped 7 in (180 mm) of rain in three hours, flooding numerous streets and homes. Throughout Florida, damage was minimal, and there were no deaths. However, lightning from a feeder band injured a man in Lee County
Lee County, Florida
Lee County is a county located in the U.S. state of Florida. Located in southwest Florida, the principal cities in the county are Fort Myers and Cape Coral...

, while an indirect injury occurred from a car crash due to hydroplaning.

In the Bahamas, outer rainband
Rainband
A rainband is a cloud and precipitation structure associated with an area of rainfall which is significantly elongated. Rainbands can be stratiform or convective, and are generated by differences in temperature. When noted on weather radar imagery, this precipitation elongation is referred to as...

s from Henri dropped around 1 inch (25 mm) of rain. Winds in the archipelago gusted to 32 mph (51 km/h). Just days after Hurricane Fabian
Hurricane Fabian
Hurricane Fabian was a powerful Cape Verde-type hurricane that hit Bermuda in early September during the 2003 Atlantic hurricane season. Fabian, the sixth named storm, fourth hurricane, and first major hurricane of the season, developed from a tropical wave in the tropical Atlantic Ocean on August 25...

 struck 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...

, moisture from Henri brought thunderstorms and heavy rainfall and thunderstorms totaling to 2.44 inches (62 mm) at the airport
Bermuda International Airport
L.F. Wade International Airport , formerly named Bermuda International Airport, is the sole airport serving Bermuda, a British overseas territory in the North Atlantic Ocean. It is located in the parish of St. George's and is northeast of Bermuda's capital city of Hamilton. In 2006, L.F. Wade...

. This hindered cleanup efforts, though caused no known damage.

Mid-Atlantic

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...

, 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...

, and Maryland
Maryland
Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...

, rainfall was generally light, with the exception of a few areas receiving over 3 inches (75 mm). Henri produced greater amounts of rain in Delaware
Delaware
Delaware is a U.S. state located on the Atlantic Coast in the Mid-Atlantic region of the United States. It is bordered to the south and west by Maryland, and to the north by Pennsylvania...

 and Pennsylvania
Pennsylvania
The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...

, with a peak of 9.02 in (229 mm) in Hockessin
Hockessin, Delaware
Hockessin is a census-designated place in New Castle County, Delaware, United States. The population was 12,902 at the 2000 census. The place name may be derived from the Lenape word "hòkèsa" meaning "pieces of bark" or from a misspelling of "occasion," as pronounced by the Quakers who settled...

. In Downingtown, Pennsylvania
Downingtown, Pennsylvania
Downingtown is a borough in Chester County, Pennsylvania, west of Philadelphia. As of the 2010 census it had a population of 7,891. Downingtown was settled by English and European colonists in the early 18th century and has a number of historic buildings and structures.-History:The town was...

, over eight inches (203 mm) of rain fell in around six hours, while Doppler Radar estimated that Kennett Square
Kennett Square, Pennsylvania
Kennett Square is a borough in Chester County, Pennsylvania, United States. It is known as the Mushroom Capital of the World because mushroom farming in the region produces over a million pounds of mushrooms a year...

 received over 10 inches (255 mm) in a five hour period. The heavy rainfall led to record discharge rates along the Red Clay Creek
Red Clay Creek
Red Clay Creek is a tributary of White Clay Creek in southeastern Pennsylvania and northern Delaware in the United States.The East and West branches both rise in West Marlborough Township, Pennsylvania, near the hamlet of Upland, and flow south through Kennett Square before uniting just north of...

, which also had a record crest peaking at just below 26 feet (8 m). Parts of the river saw a 500-year flood
100-year flood
A one-hundred-year flood is calculated to be the level of flood water expected to be equaled or exceeded every 100 years on average. The 100-year flood is more accurately referred to as the 1% annual exceedance probability flood, since it is a flood that has a 1% chance of being equaled or exceeded...

, which has a 0.2% chance of occurring in any given year. Numerous rivers in southeastern Pennsylvania
Pennsylvania
The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...

 also crested above their flood stage.

In Delaware
Delaware
Delaware is a U.S. state located on the Atlantic Coast in the Mid-Atlantic region of the United States. It is bordered to the south and west by Maryland, and to the north by Pennsylvania...

, the flooding damaged numerous houses, including 194 in the Glenville
Glenville, Delaware
Glenville, Delaware is a ghost town in Delaware, United States, at . The community consisted of a development on Bread and Cheese Island, on the east bank of the Red Clay Creek near its mouth, just south of Delaware Route 4 near Stanton...

 area. The rapid flooding trapped numerous people in their cars and homes, forcing at least one rescue by helicopter. Those people were evacuated to nearby schools. The severe flooding washed out most of a bridge in Hockessin and destroyed 6 Wilmington & Western Railroad
Wilmington & Western Railroad
The Wilmington and Western Railroad is a freight and heritage railroad in northern Delaware, operating over a former Baltimore and Ohio Railroad branch between Wilmington and Hockessin. The line has both steam and diesel locomotives in operation, pulling a wide variety of excursion trains up and...

 bridges, causing about $5 million (2003 USD, $5.5 million 2006 USD) in damage. The railroad bridges were still being rebuilt as of 2006. Greenbank Mill, a historic gristmill
Gristmill
The terms gristmill or grist mill can refer either to a building in which grain is ground into flour, or to the grinding mechanism itself.- Early history :...

 complex, saw $450,000 in damage. Damage in Delaware totaled to $16.1 million (2003 USD
United States dollar
The United States dollar , also referred to as the American dollar, is the official currency of the United States of America. It is divided into 100 smaller units called cents or pennies....

, $17.5 million 2006 USD).

Flash flooding in Pennsylvania resulted in 2,600 emergency 911 calls and around 100 rescues for cars or houses. The flooding destroyed 12 homes, and damaged 336, over half of them severely. Wet soil downed trees and power lines, causing power outages to 109,000 PECO Energy customers. High floodwaters damaged 22 bridges and closed 2 indefinitely, while the flooding closed several roads, including a portion of U.S. Highway 1
U.S. Route 1
U.S. Route 1 is a major north–south U.S. Highway that serves the East Coast of the United States. It runs 2,377 miles from Fort Kent, Maine at the Canadian border south to Key West, Florida. U.S. 1 generally parallels Interstate 95, though it is significantly farther west between...

 in Chadds Ford. Damage in Pennsylvania totaled to $3.5 million (2003 USD
United States dollar
The United States dollar , also referred to as the American dollar, is the official currency of the United States of America. It is divided into 100 smaller units called cents or pennies....

, $3.8 million 2006 USD). The impacts were severely compounded the following week by Hurricane Isabel
Hurricane Isabel
Hurricane Isabel was the costliest and deadliest 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...

 across the region.

Aftermath

On September 23, just days after the storm moved through, President
President of the United States
The President of the United States of America is the head of state and head of government of the United States. The president leads the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces....

 George W. Bush
George W. Bush
George Walker Bush is an American politician who served as the 43rd President of the United States, from 2001 to 2009. Before that, he was the 46th Governor of Texas, having served from 1995 to 2000....

 declared New Castle County, Delaware
New Castle County, Delaware
New Castle County is the northernmost of the three counties of the U.S. state of Delaware. As of 2010 its population was 538,479, an increase of 7.6% over the previous decade. The county seat is Wilmington. The center of population of Delaware is located in New Castle County, in the town of...

 as a disaster area following the effects of Henri and later Hurricane Isabel
Hurricane Isabel
Hurricane Isabel was the costliest and deadliest 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...

. The declaration designated the affected citizens eligible for grants to pay for temporary housing, house repairs, and serious disaster-related expenses. The declaration also allowed for federal funding for 75% of the repair cost for replacing public facilities. By two months after the storm, 659 residents had applied for disaster aid through the Federal Emergency Management Agency
Federal Emergency Management Agency
The Federal Emergency Management Agency is an agency of the United States Department of Homeland Security, initially created by Presidential Reorganization Plan No. 1 of 1978 and implemented by two Executive Orders...

 (FEMA), totaling to just over $1 million (2003 USD, $1.1 million 2006 USD). 141 small businesses applied for loans, totaling to around $2.5 million (2003 USD, $2.75 million 2006 USD). In addition, FEMA received 183 applications for public assistance, which would be used for rebuilding public roads and buildings. Over twenty volunteer organizations met to establish a long-term committee to find resources for disaster recovery needs. One goal sought by the committee was to find a permanent housing solution for every one who was displaced from their houses from the storms. Volunteers also helped remove ruined appliances and furniture to local landfills, totaling to more than 300 tons. State and county governments in Delaware purchased 171 homes following the damage in the Glenville area, the highest number of houses purchased in the state due to storm damage. The house purchasing was done to mitigate the flood damage by restoring the area as a wetland
Wetland
A wetland is an area of land whose soil is saturated with water either permanently or seasonally. Wetlands are categorised by their characteristic vegetation, which is adapted to these unique soil conditions....

.

On September 26, President Bush also declared Chester County, Pennsylvania
Chester County, Pennsylvania
-State parks:*French Creek State Park*Marsh Creek State Park*White Clay Creek Preserve-Demographics:As of the 2010 census, the county was 85.5% White, 6.1% Black or African American, 0.2% Native American or Alaskan Native, 3.9% Asian, 0.0% Native Hawaiian, 1.8% were two or more races, and 2.4% were...

 as a disaster area following the damage of Henri, Tropical Storm Isabel
Hurricane Isabel
Hurricane Isabel was the costliest and deadliest 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...

, and severe flooding unrelated to either tropical cyclone. By a month after the declaration, 342 homeowners and business owners applied for disaster aid, totaling to around $600,000 (2003 USD, $660,000 2006 USD).

See also

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