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The 2013 Atlantic hurricane season was a well below average Atlantic hurricane season and the first since
1994 File:1994 Events Collage.png, From left, clockwise: The 1994 Winter Olympics are held in Lillehammer, Norway; The Kaiser Permanente building after the 1994 Northridge earthquake; A model of the MS Estonia, which sank in the Baltic Sea; Nelson ...
with no major hurricanes. It was well below average for both hurricanes and major hurricanes but it was a slightly above average year for named storms. It was also the first season in the satellite era with no storms of at least Category 2 intensity on the Saffir–Simpson hurricane wind scale. The first
tropical cyclone 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 and squalls. Depen ...
of the season, Andrea, developed on June 5, while the final cyclone, an unnamed subtropical storm, dissipated on December 7. Throughout the year, only two storms—Humberto and
Ingrid Ingrid may refer to: * Ingrid (given name) * Ingrid (record label), and artist collective * Ingrid Burley, rapper known mononymously as Ingrid * Tropical Storm Ingrid, various cyclones * 1026 Ingrid, an asteroid * InGrid, the grid computing project ...
—reached hurricane intensity; this was the lowest seasonal total since 1982. The season's impact was minimal; although 15 tropical cyclones developed, most were weak or remained at sea. Tropical Storm Andrea killed four people after making
landfall Landfall is the event of a storm moving over land after being over water. More broadly, and in relation to human travel, it refers to 'the first land that is reached or seen at the end of a journey across the sea or through the air, or the fact ...
in
Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...
and moving up the East Coast of the United States. In early July,
Tropical Storm Chantal The name Chantal has been used for eight tropical cyclones worldwide: seven in the Atlantic Ocean and one in the South-West Indian Ocean. In the Atlantic: * Hurricane Chantal (1983), formed near Bermuda and dissipated in the open ocean. *Hurricane ...
moved through the Windward Islands, causing one fatality, but minimal damage overall. Tropical storms Dorian and Erin and Hurricane Humberto brought only squally weather to the
Cape Verde Islands , national_anthem = () , official_languages = Portuguese , national_languages = Cape Verdean Creole , capital = Praia , coordinates = , largest_city = capital , demonym ...
. Mexico, where Hurricane Ingrid, Tropical Depression Eight, and tropical storms
Barry Barry may refer to: People and fictional characters * Barry (name), including lists of people with the given name, nickname or surname, as well as fictional characters with the given name * Dancing Barry, stage name of Barry Richards (born c. 19 ...
and Fernand all made landfall, was the hardest hit; Ingrid alone caused at least 32 deaths and $1.5 billion (2013
USD The United States dollar (symbol: $; code: USD; also abbreviated US$ or U.S. Dollar, to distinguish it from other dollar-denominated currencies; referred to as the dollar, U.S. dollar, American dollar, or colloquially buck) is the official ...
) in damage. In early October,
Karen Karen may refer to: * Karen (name), a given name and surname * Karen (slang), a term and meme for a demanding woman displaying certain behaviors People * Karen people, an ethnic group in Myanmar and Thailand ** Karen languages or Karenic l ...
brought showers and gusty winds to the central Gulf Coast of the United States, before impacting the U.S. East Coast as a long-lived
nor'easter A nor'easter (also northeaster; see below), or an East Coast low is a synoptic-scale extratropical cyclone in the western North Atlantic Ocean. The name derives from the direction of the winds that blow from the northeast. The original use ...
. All major forecasting agencies predicted an above-average season. All reduced their seasonal predictions in early August, but even the revised predictions were too high. The lack of activity was primarily caused by an unexpected significant weakening of the Atlantic Ocean
thermohaline circulation Thermohaline circulation (THC) is a part of the large-scale ocean circulation that is driven by global density gradients created by surface heat and freshwater fluxes. The adjective ''thermohaline'' derives from '' thermo-'' referring to temp ...
between winter and spring. This resulted in continuation of the spring weather pattern over the Atlantic Ocean, with strong vertical
wind shear Wind shear (or windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizont ...
, mid-level moisture, and atmospheric stability, which suppressed
tropical cyclogenesis Tropical cyclogenesis is the development and strengthening of a tropical cyclone in the atmosphere. The mechanisms through which tropical cyclogenesis occurs are distinctly different from those through which temperate cyclogenesis occurs. Tr ...
.


Seasonal forecasts

In advance of, and during, each hurricane season, several forecasts of hurricane activity are issued by national meteorological services, scientific agencies, and noted hurricane experts. These include forecasters from the United States
National Oceanic and Atmospheric Administration The National Oceanic and Atmospheric Administration (abbreviated as NOAA ) is an United States scientific and regulatory agency within the United States Department of Commerce that forecasts weather, monitors oceanic and atmospheric conditio ...
(NOAA)'s National Hurricane and
Climate Prediction Center The Climate Prediction Center (CPC) is a United States federal agency that is one of the National Centers for Environmental Prediction, which are a part of the National Oceanic and Atmospheric Administration's National Weather Service. CPC is hea ...
, Tropical Storm Risk, the United Kingdom's Met Office, and Philip J. Klotzbach, William M. Gray and associates at Colorado State University (CSU). The forecasts include weekly and monthly changes in significant factors that help determine the number of tropical storms, hurricanes, and major hurricanes within a particular year. According to NOAA and CSU, the average Atlantic hurricane season between 1981 and 2010 contained roughly 12 tropical storms, six hurricanes, three major hurricanes, and an accumulated cyclone energy (ACE) index of 66–103 units. Broadly speaking, ACE is a measure of the power of a tropical or subtropical storm multiplied by the length of time it existed. Therefore, a storm with a longer duration, such as Humberto, will have high values of ACE. It is only calculated for full advisories on specific tropical and subtropical systems reaching or exceeding wind speeds of . Accordingly, tropical depressions are not included here. After the storm has dissipated, typically after the end of the season, the NHC reexamines the data, and produces a final report on each storm. These revisions can lead to a revised ACE total either upward or downward compared to the operational value. NOAA typically categorizes a season as either above-average, average, or below-average based on the cumulative ACE Index, but the number of tropical storms, hurricanes, and major hurricanes within a hurricane season are considered occasionally as well.


Pre-season forecasts

Multiple agencies predicted above-average activity, citing forecasts for slower-than-average trade winds, warmer-than-normal sea surface temperatures, abnormally low wind shear, and the unlikelihood of an El Niño developing prior to the peak of the season. On December 5, 2012, Tropical Storm Risk (TSR), a public consortium consisting of experts on insurance, risk management, and seasonal climate forecasting at
University College London , mottoeng = Let all come who by merit deserve the most reward , established = , type = Public research university , endowment = £143 million (2020) , budget = ...
, issued an extended-range forecast. In its report, the organization called for 15.4 (±4.3) named storms, 7.7 (±2.9) hurricanes, 3.4 (±1.6) major hurricanes, and a cumulative Accumulated Cyclone Energy (ACE) index of 134. While no value was placed on the number of expected landfalls during the season, TSR stated that the landfalling ACE index was expected to be above average. Four months later, on April 5, Tropical Storm Risk issued its updated forecast, continuing to call for an above-average season with 15.2 (±4.1) named storms, 7.5 (±2.8) hurricanes, 3.4 (±1.6) major hurricanes, and an ACE index of 131; the landfalling ACE index was once again forecast to be higher than normal. Meanwhile, on April 8, Weather Services International (WSI) issued its first forecast for the hurricane season. In its report, the organization forecast 16 named storms, nine hurricanes, and five major hurricanes. On April 10, Colorado State University (CSU) issued its first forecast for the season, calling for a potentially hyperactive season with 18 named storms, nine hurricanes, four major hurricanes, and an ACE index of 165. The probabilities of a major hurricane hitting the Gulf Coast and East Coast were well above average. On May 15, the United Kingdom Met Office (UKMO) predicted 14 named storms, with a 70% chance that the number would be between 10 and 18, and nine hurricanes with a 70% chance that the number would be between 4 and 14. It also predicted an ACE index of 130 with a 70% chance that the index would be in the range 76 to 184. On May 23, 2013, NOAA issued its first seasonal outlook for the year, stating there was a 70% likelihood of 13 to 20 named storms, of which seven to eleven could become hurricanes, including three to six major hurricanes; these ranges are greater than the seasonal average of twelve named storms, six hurricanes and three major hurricanes. On May 30, the Florida State University Center for Ocean-Atmospheric Prediction Studies, FSU COAPS, issued its first and only prediction for the season. The organization called for 12 to 17 named storms, of which five to ten would further intensify into hurricanes; no forecast was given for the number of major hurricanes. In addition, an ACE index of 135 units was forecast.


Mid-season outlooks

In June, predictions from CSU and TSR were similar to pre-season forecasts due to the a lack of an El Niño and warmer-than-average sea surface temperatures across the Atlantic Ocean. However, by July and August, CSU and TSR all adjusted their forecasts downward because of predictions of cooler-than-average sea surface temperatures and above-average wind shear. NOAA also decreased the amount of activity in its final outlook, despite predicting a wetter-than-average western Africa and above-average sea surface temperatures in its report. On June 3, CSU issued its first mid-season prediction for the remainder of the year. In its report, the organization continued to predict well above-average activity, with eighteen named storms, nine hurricanes, four major hurricanes, and an ACE index of 165 units. CSU stated that there was a 72% chance of at least one major hurricane impacting any stretch of the United States coastline; the chances of a major hurricane hitting the East Coast and Gulf Coast were 48% and 47%, respectively. The following day, Tropical Storm Risk issued its third forecast for the 2013 Atlantic hurricane season, calling for sixteen named storms, eight hurricanes, four major hurricanes, and an ACE of 134 units; this activity was predicted to be roughly 30% above the 1950–2012 long-term mean. TSR gave a 65% probability that the landfalling ACE index would be above-average. A month later, TSR lowered its numbers to 15 named storms, seven hurricanes, and three major hurricanes. On August 2, Colorado State University issued another update for the season, lowering its numbers slightly. However, the organization continued to state that there was an above-average probability of a United States and Caribbean major hurricane landfall. Finally, on August 8, NOAA issued its second and final outlook for the season, predicting 13 to 19 named storms, six to nine hurricanes, and three to five major hurricanes; these numbers were down slightly from its May outlook.


Post-season review

With 14 tropical storms, two hurricanes, and no major hurricanes, activity fell far below most predictions. Brian McNoldy at the University of Miami noted several reasons why NOAA should not cease seasonal predictions, including the variability of hurricane seasons and the value of supplementing climatology with seasonal forecasts. Further, McNoldy argued that forecasting a hurricane season "challenges us to better understand how the atmosphere works." On November 29, Dr. Phil Klotzbach of CSU noted that " r. Gray and Ihave been doing these forecasts for 30 years and that's probably the biggest forecast bust that we've had." The program, which had already lost contributions from an insurance company in June, was defunded further following the botched season forecasts. However, Gray and Klotzbach were able to issue predictions for the 2014 season.


Seasonal summary

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Saffir–Simpson scale The Saffir–Simpson hurricane wind scale (SSHWS) classifies hurricanes—which in the Western Hemisphere are tropical cyclones that exceed the intensities of tropical depressions and tropical storms—into five categories distinguished b ...
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The Atlantic hurricane season officially began on June 1, 2013. It was a below average season in which 14 tropical cyclones and one subtropical cyclone formed. Thirteen of the fifteen designated cyclones attained tropical storm status. However, only two of those became hurricanes, the fewest since 1982; neither of these intensified into a major hurricane, the first such occasion since
1994 File:1994 Events Collage.png, From left, clockwise: The 1994 Winter Olympics are held in Lillehammer, Norway; The Kaiser Permanente building after the 1994 Northridge earthquake; A model of the MS Estonia, which sank in the Baltic Sea; Nelson ...
. 2013 was also the most active season without a major hurricane. By default, 2013 extended the period without major hurricane landfalls in the United States to eight years since
Hurricane Wilma Hurricane Wilma was an extremely intense and destructive Atlantic hurricane which was the most intense storm of its kind and the second-most intense tropical cyclone recorded in the Western Hemisphere, after Hurricane Patricia in 2015. Part o ...
in 2005. Further, neither hurricane exceeded Category 1 intensity for the first time since
1925 Events January * January 1 ** The Syrian Federation is officially dissolved, the State of Aleppo and the State of Damascus having been replaced by the State of Syria. * January 3 – Benito Mussolini makes a pivotal speech in the Itali ...
. Throughout the season, NOAA and the United States Air Force Reserve flew a total of 45 reconnaissance missions over the Atlantic basin, totaling 435 hours; this was the lowest number of flight hours since 1966. One hurricane and three tropical storms made landfall during the season, causing 56 deaths and about $1.51 billion in damage. The last storm of the season dissipated on December 7, a week after the official end of hurricane season on November 30, 2013. Activity was primarily suppressed by significant weakening of the Atlantic Ocean
thermohaline circulation Thermohaline circulation (THC) is a part of the large-scale ocean circulation that is driven by global density gradients created by surface heat and freshwater fluxes. The adjective ''thermohaline'' derives from '' thermo-'' referring to temp ...
(THC) early in the year, representing the largest reduction in strength of the THC since NCEP/NCAR Reanalysis began. The weakening of the THC was possibly the result of lowered ocean salinity and a decrease in North Atlantic Deep Water formation. Oceanic and atmospheric gyres were able to strengthen in the subtropical Atlantic, allowing southward advection of cold air and water. Consequently, there was a significant cooling of
sea surface temperature Sea surface temperature (SST), or ocean surface temperature, is the ocean temperature close to the surface. The exact meaning of ''surface'' varies according to the measurement method used, but it is between and below the sea surface. Air mas ...
s over portions of the north Atlantic. This resulted in a continuation of the spring weather pattern over the Atlantic Ocean, with strong vertical
wind shear Wind shear (or windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizont ...
, reduced mid-tropospheric moisture, and high atmospheric stability. The weak THC also resulted in slightly stronger
trade winds The trade winds or easterlies are the permanent east-to-west prevailing winds that flow in the Earth's equatorial region. The trade winds blow mainly from the northeast in the Northern Hemisphere and from the southeast in the Southern Hemisp ...
and less wind convergence and rainfall in the Intertropical Convergence Zone, with an increase in upper-level zonal winds and higher environmental air pressures. Collectively, these factors worked to suppress
tropical cyclogenesis Tropical cyclogenesis is the development and strengthening of a tropical cyclone in the atmosphere. The mechanisms through which tropical cyclogenesis occurs are distinctly different from those through which temperate cyclogenesis occurs. Tr ...
. Tropical cyclogenesis began in early June, with the development of Tropical Storm Andrea in the Gulf of Mexico on June 5. Twelve days later, Tropical Storm Barry formed in the northwestward Caribbean Sea. Two named storms originated during the month of July—tropical storms Chantal and Dorian. Similarly, there were two tropical storms in August, Erin and Fernand. In September, four tropical cyclones formed, three of which strengthened into tropical storms; two of those reached hurricane status. The most intense tropical cyclone—Hurricane Humberto—peaked with
maximum sustained wind The maximum sustained wind associated with a tropical cyclone is a common indicator of the intensity of the storm. Within a mature tropical cyclone, it is found within the eyewall at a distance defined as the radius of maximum wind, or RMW. Unl ...
s of on September 11, which is a Category 1 on the Saffir–Simpson hurricane wind scale. The other hurricane, Ingrid, was the most devastating storm of the season and peaked at slightly less intensity. Activity began to slow in October, with the development of only two tropical storms, Karen and Lorenzo. Tropical cyclogenesis then halted for almost a month, until Tropical Storm Melissa formed over the eastern Atlantic Ocean on November 18. This was the only tropical cyclone in the month of November. The final system was an unnamed subtropical storm that developed south of the Azores on December 5. After meandering for two days, it degenerated into a remnant
low-pressure area In meteorology, a low-pressure area, low area or low is a region where the atmospheric pressure is lower than that of surrounding locations. Low-pressure areas are commonly associated with inclement weather (such as cloudy, windy, with possible ...
on December 7. The season's activity was reflected with an accumulated cyclone energy (ACE) rating of 36. This was well below the 1981–2010 median of 92, and the lowest value since 1994.


Systems


Tropical Storm Andrea

An area of low pressure in the eastern
Gulf of Mexico The Gulf of Mexico ( es, Golfo de México) is an ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of the United ...
developed into Tropical Storm Andrea on June 5. Despite strong wind shear and an abundance of dry air, the storm strengthened while initially heading north-northeastward, before turning northeastward later that day. Andrea intensified and peaked as a strong tropical storm with winds at on June 6. A few hours later, the storm weakened slightly and made
landfall Landfall is the event of a storm moving over land after being over water. More broadly, and in relation to human travel, it refers to 'the first land that is reached or seen at the end of a journey across the sea or through the air, or the fact ...
near Steinhatchee, Florida. It began losing tropical characteristics while tracking across Florida and
Georgia Georgia most commonly refers to: * Georgia (country), a country in the Caucasus region of Eurasia * Georgia (U.S. state), a state in the Southeast United States Georgia may also refer to: Places Historical states and entities * Related to the ...
. Andrea transitioned into an extratropical cyclone over
South Carolina )'' Animis opibusque parati'' ( for, , Latin, Prepared in mind and resources, links=no) , anthem = " Carolina";" South Carolina On My Mind" , Former = Province of South Carolina , seat = Columbia , LargestCity = Charleston , LargestMetro = ...
on June 7, though the remnants continued to move along the East Coast of the United States until being absorbed by another extratropical storm off
Maine Maine () is a state in the New England and Northeastern regions of the United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Canadian provinces of New Brunswick and Quebec to the northeast and ...
on June 10. The precursor to Andrea dropped nearly of rainfall on the Yucatán Peninsula. In Cuba, the storm brought flooding, with over 1,000 people fleeing their homes, mainly along the
Cuyaguateje River Cuyaguateje River is a river of southern Cuba. See also *List of rivers of Cuba This is an incomplete list of rivers of Cuba, arranged from west to east, by coast, with respective tributaries indented under each larger stream's name. North Coa ...
in
Pinar del Río Province Pinar del Río is one of the provinces of Cuba. It is at the western end of the island of Cuba. Geography The Pinar del Río province is Cuba's westernmost province and contains one of Cuba's three main mountain ranges, the Cordillera de Guanig ...
. In the area, five
tornado A tornado is a violently rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. It is often referred to as a twister, whirlwind or cyclone, altho ...
es were spawned, one of which damaged three homes. In Florida, the storm brought heavy rainfall to some areas, causing localized flooding. There were 10 tornadoes, the worst of which touched down in The Acreage. The twister downed power lines and trees, causing significant roof damage to several houses; there was also one injury. A surfer went missing in South Carolina and was presumed to have drowned. The remnants of Andrea spawned one tornado in North Carolina, though damage was minor. Additionally, flooding was reported in some areas of the Northeastern United States. Three fatalities occurred due to weather-related traffic accidents in
Virginia Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth ar ...
and
New Jersey New Jersey is a state in the Mid-Atlantic and Northeastern regions of the United States. It is bordered on the north and east by the state of New York; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delaware ...
. The remnants of Andrea brought gusty winds to Atlantic Canada, causing thousands of power outages in
Nova Scotia Nova Scotia ( ; ; ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. Nova Scotia is Latin for "New Scotland". Most of the population are native Eng ...
and
New Brunswick New Brunswick (french: Nouveau-Brunswick, , locally ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. It is the only province with both English and ...
.


Tropical Storm Barry

A tropical wave emerged into the Atlantic Ocean from the west coast of Africa on June 8. The system moved westward and an area of low pressure developed over the southwestern Caribbean Sea on June 16. The low then moved across Honduras, where heavy rainfall triggered flooding that damaged 60 homes and affected 300 people. The low later re-emerged into the Caribbean Sea and developed into a tropical depression at 12:00 UTC on June 17, while situated east of
Monkey River Town Monkey River Town (or Monkey River) is a village in the north of the Toledo District of Belize. It is on the Caribbean Sea on the southern shore of the mouth of Belize's Monkey River. In 2011 the estimated population was 200 people. The village ...
. About 10 hours later, it made landfall near Big Creek, Belize. In that country, an estimated of rain fell in 24 hours, causing several rivers to overflow their banks. In some areas, culverts were washed away. At least 54 people living along Hope Creek were relocated to shelters. In El Salvador, flooding and
lightning Lightning is a naturally occurring electrostatic discharge during which two electrically charged regions, both in the atmosphere or with one on the ground, temporarily neutralize themselves, causing the instantaneous release of an avera ...
caused one fatality each. Despite decreasing wind speeds as the storm crossed land, the circulation became better-defined. Early on June 19, the depression emerged into the Bay of Campeche and began strengthening due to warm
sea surface temperature Sea surface temperature (SST), or ocean surface temperature, is the ocean temperature close to the surface. The exact meaning of ''surface'' varies according to the measurement method used, but it is between and below the sea surface. Air mas ...
s. Around 12:00 UTC, the depression intensified into Tropical Storm Barry. After about 12 hours, Barry attained its peak intensity with maximum sustained winds of and a minimum
barometric pressure Atmospheric pressure, also known as barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as , which is equivalent to 1013.25 millibars, 7 ...
of . At 11:15 UTC on June 20, Barry made landfall near
Veracruz Veracruz (), formally Veracruz de Ignacio de la Llave (), officially the Free and Sovereign State of Veracruz de Ignacio de la Llave ( es, Estado Libre y Soberano de Veracruz de Ignacio de la Llave), is one of the 31 states which, along with Me ...
at the same intensity. The storm rapidly weakened and degenerated into a remnant low early on June 21. In the Mexican state of
Yucatán Yucatán (, also , , ; yua, Yúukatan ), officially the Free and Sovereign State of Yucatán,; yua, link=no, Xóot' Noj Lu'umil Yúukatan. is one of the 31 states which comprise the federal entities of Mexico. It comprises 106 separate mun ...
, wind gusts up to and heavy rains downed trees and power lines. More than 26,000 residents temporarily lost power after lightning struck a nearby power station, leading to a fire. Four deaths were reported in Mexico due to drowning.


Tropical Storm Chantal

A large tropical wave emerged into the Atlantic Ocean from the west coast of Africa on July 4. The system moved rapidly westward under the influence of a subtropical ridge.
Scatterometer A scatterometer or diffusionmeter is a scientific instrument to measure the return of a beam of light or radar waves scattered by diffusion in a medium such as air. Diffusionmeters using visible light are found in airports or along roads to measur ...
passes indicating a closed circulation confirmed that Tropical Storm Chantal had developed by 12:00 UTC on July 7, while located about east-southeast of
Barbados Barbados is an island country in the Lesser Antilles of the West Indies, in the Caribbean region of the Americas, and the most easterly of the Caribbean Islands. It occupies an area of and has a population of about 287,000 (2019 estimate) ...
. Chantal continued to move swiftly west-northwestward and was one of the fastest moving tropical cyclones in the deep tropics during the satellite era. While approaching the Lesser Antilles, it became disorganized due to wind shear, but at 12:00 UTC on July 9, Chantal peaked with sustained winds of . Shortly thereafter, it crossed through the Lesser Antilles and continued weakening in the Caribbean Sea. By late on July 10, Chantal degenerated into a tropical wave while located south of Hispaniola. The storm brought heavy rainfall to the Lesser Antilles. In Dominica, several mudslides were reported. Wind gusts up to were observed on the island, de-roofing houses and causing power outages. Strong winds were reported on Martinique, with gusts up to observed in Fort-de-France. Trees were knocked onto roads and power lines, leaving about 33,000 homes without electricity. Elsewhere, damage reported in the Lesser Antilles was minimal, and there were no casualties. Although sustained winds in Puerto Rico remained below tropical storm force, a weather station at Las Mareas in Guayama observed a wind gust of late on July 9. Winds toppled trees and power lines, blocking several roads. In Hispaniola, heavy rains caused flooding over portions of the island, but the fast-moving nature of the system precluded a more severe flooding event. In the Dominican Republic, a firefighter from the community of Maimon was killed as he was swept away by flood waters while attempting to clear a clogged storm drain. Chantal's remnant moisture interacted with a surface boundary over northeastern Florida, contributing to widespread thunderstorms that produced locally heavy rainfall and gusty winds. Overall, the storm caused at least $10 million in damage.


Tropical Storm Dorian

Early on July 22, a tropical wave with an associated low-pressure area emerged off the western coast of Africa. Based on satellite data, the wave was upgraded to a tropical depression at 18:00 UTC on July 23 while located about south of the Cape Verde Islands, and further intensified into Tropical Storm Dorian by 06:00 UTC the following day. The storm tracked swiftly west-northwest over warm ocean temperatures and within an environment of low wind shear initially, allowing it to attain peak winds of by July 25. However, the entrainment of drier mid-level air and cooler ocean waters caused a weakening trend. Late on July 27, a closed low-level circulation ceased to exist and Dorian degenerated into an open tropical wave. The remnants continued west-northwest until August 1, at which time the disturbance reached the western extend of a ridge and curved northward. Despite continued unfavorable wind shear, a broad area of low pressure formed off the east coast of Florida and became increasingly better defined. The convection gained enough organization for the system to be re-designated as a tropical depression by 18:00 UTC on August 2. However, strong northerly winds caused the depression to deteriorate into a remnant low about 24 hours later, southeast of Charleston, South Carolina. On August 4, the remnant low was absorbed into a trough off the coast of North Carolina.


Tropical Storm Erin

A tropical wave, accompanied by a misshapen area of surface low pressure and a large area of disorganized showers and thunderstorms, emerged from the west coast of Africa on August 15. The wave moved west-northwestward along the southern periphery of a ridge to its north. The system quickly organized and its circulation became more defined, warranting its classification as a tropical depression early on August 15. At the time, the depression was situated about south of Praia, Cape Verde, prompting the issuance of tropical storm warnings for the southernmost islands. Deep convection continued to develop over the center and the depression intensified into Tropical Storm Erin six hours after its initial designation. However, dry air quickly became entrained into the circulation and convection waned. Operationally (in real time), Erin was briefly downgraded to a tropical depression on August 16, though post-storm analysis indicated it retained tropical storm intensity that day. Early on August 17, the ship ''British Cygnet'' measured winds in relation to the cyclone; around this time, it was estimated that Erin attained its peak intensity with sustained winds of and a barometric pressure of . A temporary northwesterly turn occurred around this time as the storm moved through a weakness in the ridge. Later on August 17, increasing wind shear took its toll on Erin and convection became displaced from the center. The following day, Erin degenerated into a remnant low about halfway between the Lesser Antilles and the west coast of Africa. The remnants proceeded westward on the low-level trade winds before opening up into a trough early on August 20, and ultimately dissipated several days later.


Tropical Storm Fernand

On August 10, a tropical wave emerged into the Atlantic Ocean from the west coast of Africa. Another tropical wave, which spawned Tropical Storm Erin, emerged into the Atlantic on August 13. The waves moved westward and merged into a single area of disturbed weather east of the Lesser Antilles. Further development did not occur until it crossed the Caribbean Sea and reached the Bay of Campeche on August 25. A tropical depression formed around 12:00 UTC that day, about north-northeast of
Coatzacoalcos Coatzacoalcos () is a major port city in the southern part of the Mexican state of Veracruz, mostly on the western side of the Coatzacoalcos River estuary, on the Bay of Campeche, on the southern Gulf of Mexico coast. The city serves as the municip ...
,
Veracruz Veracruz (), formally Veracruz de Ignacio de la Llave (), officially the Free and Sovereign State of Veracruz de Ignacio de la Llave ( es, Estado Libre y Soberano de Veracruz de Ignacio de la Llave), is one of the 31 states which, along with Me ...
. Six hours later, the depression deepened into Tropical Storm Fernand. Early on August 26, Fernand peaked with sustained winds of . At 04:45 UTC, the storm made landfall near Zempoala, Veracruz, at the same intensity. Fernand weakened to a tropical depression later on August 26, hours before dissipating. On August 25, a
tropical storm warning Tropical cyclone warnings and watches are alerts 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 popul ...
was posted for the Gulf Coast of Mexico from
Veracruz Veracruz (), formally Veracruz de Ignacio de la Llave (), officially the Free and Sovereign State of Veracruz de Ignacio de la Llave ( es, Estado Libre y Soberano de Veracruz de Ignacio de la Llave), is one of the 31 states which, along with Me ...
northward to
Tampico Tampico is a city and port in the southeastern part of the state of Tamaulipas, Mexico. It is located on the north bank of the Pánuco River, about inland from the Gulf of Mexico, and directly north of the state of Veracruz. Tampico is the fifth ...
. Warnings were canceled north of Barra de
Nautla, Veracruz Nautla is a settlement in the Mexican state of Veracruz. ''Nautla'' comes from the Nahuatl ''naui'', 'four'; and from ''tlan'', that means 'place'; so it is known as 'Four Places'. History First it was a prehispanic town that was in Casitas, V ...
early on August 26, and discontinued entirely after Fernand weakened to a tropical depression. The
Mexican Navy The Mexican Navy is one of the two independent armed forces of Mexico. The actual naval forces are called the ''Armada de México''. The ''Secretaría de Marina'' (''SEMAR'') (English: Naval Secretariat) includes both the ''Armada'' itself and ...
helped people in
Veracruz Veracruz (), formally Veracruz de Ignacio de la Llave (), officially the Free and Sovereign State of Veracruz de Ignacio de la Llave ( es, Estado Libre y Soberano de Veracruz de Ignacio de la Llave), is one of the 31 states which, along with Me ...
evacuate their homes efficiently. Classes at all levels of education in the state were closed during the storm's passage. Impact from the storm in Mexico was most severe in Veracruz, where 13 people were killed by landslides: nine in
Yecuatla Yecuatla is a municipality located in the north zone in the State of Veracruz, about 40 km from state capital Xalapa. It has a surface of 135.72 km2. It is located at . The name comes from the language Náhuatl, Yec-uauh-tlan; that means ...
, three in
Tuxpan Tuxpan (or Túxpam, fully Túxpam de Rodríguez Cano) is both a municipality and city located in the Mexican state of Veracruz. The population of the city was 78,523 and of the municipality was 134,394 inhabitants, according to the INEGI census ...
, and one in Atzalán. In the city of Veracruz, heavy rainfall flooded roads, while downed trees caused power outages. In Boca del Río, flooding stranded people at a shopping plaza. Damage was reported in 19
municipalities A municipality is usually a single administrative division having corporate status and powers of self-government or jurisdiction as granted by national and regional laws to which it is subordinate. The term ''municipality'' may also mean the go ...
, mostly in northern and central Veracruz. The storm damaged 457 homes and caused 4 rivers to overflow. In
Oaxaca Oaxaca ( , also , , from nci, Huāxyacac ), officially the Free and Sovereign State of Oaxaca ( es, Estado Libre y Soberano de Oaxaca), is one of the 32 states that compose the political divisions of Mexico, Federative Entities of Mexico. It is ...
, a man died after being swept away by a swollen river. After the storm, Veracruz governor Javier Duarte declared a state of emergency for 92 municipalities, which allowed farmers who sustained damage to receive aid.


Tropical Storm Gabrielle

In late August, a tropical wave accompanied by a broad area of low pressure exited the west coast of Africa. While the wave was south of Puerto Rico, another tropical wave reached the system and enhanced deep convection. Late on September 4, a tropical depression developed about south-southeast of Puerto Rico. Operationally, the depression was upgraded to Tropical Storm Gabrielle early on September 5. However, in post-analysis, it was determined that Gabrielle was never a tropical storm in the Caribbean. The depression moved west-northwestward and lost its closed circulation near the eastern tip of Hispaniola late on September 5. During a 48-hour period, the disturbance brought of rain to some areas of Puerto Rico. A mudslide detached part of a small bridge on Highway 184. On
Saint Croix Saint Croix; nl, Sint-Kruis; french: link=no, Sainte-Croix; Danish and no, Sankt Croix, Taino: ''Ay Ay'' ( ) is an island in the Caribbean Sea, and a county and constituent district of the United States Virgin Islands (USVI), an unincor ...
, minor street flooding was reported, and several trees were downed. The remnant system was monitored for regeneration. By September 9, wind shear began decreasing and the system re-developed into a tropical depression early on September 10. Six hours later, the depression moved northward and strengthened into Tropical Storm Gabrielle. By 12:00 UTC on September 10, it peaked with maximum sustained winds of and a minimum barometric pressure of . The storm passed about east of Hamilton, Bermuda early on September 11. Strong winds on the island downed trees branches, caused minor infrastructural damage, and left minor power outages. After marked oscillations in intensity on September 12, Gabrielle finally succumbed to wind shear midway between Bermuda and Cape Cod.


Tropical Depression Eight

The eighth tropical depression of the season originated from a tropical wave that crossed the western coast of Africa on August 23. Tracking westward, the wave reached the Caribbean Sea and became increasingly ill-defined while in the central Caribbean. An increase in convection was observed on September 1 and the subsequent day as the wave entered the western Caribbean. After moving into the Bay of Campeche, a broad low-pressure area formed in association with the system on September 5. An increase in deep convection on September 6 led to the formation of a tropical depression by 12:00 UTC, located approximately east-northeast of
Tampico Tampico is a city and port in the southeastern part of the state of Tamaulipas, Mexico. It is located on the north bank of the Pánuco River, about inland from the Gulf of Mexico, and directly north of the state of Veracruz. Tampico is the fifth ...
, Mexico. The cyclone then moved west-southwest under the influence of an anticyclone. Around 18:00 UTC on September 6, the depression made landfall near Tampico. Once inland, the depression quickly diminished to a remnant low by 06:00 UTC on September 7. It dissipated six hours later. Heavy rains across
Tamaulipas Tamaulipas (), officially the Free and Sovereign State of Tamaulipas ( es, Estado Libre y Soberano de Tamaulipas), is a state in the northeast region of Mexico; one of the 31 states which, along with Mexico City, comprise the 32 Federal Entiti ...
and
Veracruz Veracruz (), formally Veracruz de Ignacio de la Llave (), officially the Free and Sovereign State of Veracruz de Ignacio de la Llave ( es, Estado Libre y Soberano de Veracruz de Ignacio de la Llave), is one of the 31 states which, along with Me ...
triggered flooding in areas that had been affected by Tropical Storm Fernand just two weeks prior. The most significant effects were in Veracruz where hundreds of homes were inundated. Record-breaking rains in
Mexico City Mexico City ( es, link=no, Ciudad de México, ; abbr.: CDMX; Nahuatl: ''Altepetl Mexico'') is the capital city, capital and primate city, largest city of Mexico, and the List of North American cities by population, most populous city in North Amer ...
, falling at rates of per hour, caused significant flooding. Many streets were inundated, paralyzing traffic and prompting water rescues. An estimated 20,000 homes were damaged by the floods and officials opened four shelters in the area.


Hurricane Humberto

A tropical wave exited the west coast of Africa on September 7 and spawned a low-pressure area by the following day. At 18:00 UTC on September 8, a tropical depression developed about west-southwest of
Dakar Dakar ( ; ; wo, Ndakaaru) (from :wo:daqaar, daqaar ''tamarind''), is the capital city, capital and List of cities in Senegal, largest city of Senegal. The city of Dakar proper has a population of 1,030,594, whereas the population of the Dakar ...
,
Senegal Senegal,; Wolof: ''Senegaal''; Pulaar: 𞤅𞤫𞤲𞤫𞤺𞤢𞥄𞤤𞤭 (Senegaali); Arabic: السنغال ''As-Sinighal'') officially the Republic of Senegal,; Wolof: ''Réewum Senegaal''; Pulaar : 𞤈𞤫𞤲𞤣𞤢𞥄𞤲𞤣𞤭 ...
. The depression moved steadily westward and intensified into Tropical Storm Humberto early on September 9. Despite moderate wind shear, Humberto continued to strengthen while passing south of Cape Verde, due to a moist atmosphere and warm ocean temperatures. The storm brought squalls to Cape Verde. The southwestern islands experienced wind gusts exceeding which downed several trees. Heavy rains in many areas triggered flooding that washed out roads and damaged homes. Offshore, the freighter ''Rotterdam'' went missing with a crew of six amid swells. The vessel eventually reached São Tomé and Príncipe, though that country's port institute and coast guard denied her entrance. Later on September 10, the storm's deepening briefly halted as it curved northwest in response to a developing mid-level trough over the central Atlantic. At 12:00 UTC on September 11, Humberto reached hurricane status while turning northward. About six hours later, it peaked with sustained winds of . By late on September 12, increasing wind shear, cooling sea surface temperatures, and a more stable atmosphere led to a weakening trend of the storm. Around 12:00 UTC on the next day, Humberto fell to tropical storm intensity, while curving west-northwestward in the low-level flow south of the Azores surface high pressure. Early on September 14, the storm degenerated into a remnant low. However, deep convection began re-developing later that day. At 00:00 UTC on September 15, Humberto regenerated into a tropical storm about southwest of
Ponta Delgada Ponta Delgada (; ) is the largest municipality ('' concelho'') and economic capital of the Autonomous Region of the Azores in Portugal. It is located on São Miguel Island, the largest and most populous in the archipelago. As of 2021, it has 67, ...
, Azores. An approaching mid- to upper-level cyclone began to capture Humberto, causing the storm to decelerate between late on September 16 and early on September 17. When Humberto's low-level circulation became vertically stacked under the non-tropical cyclone, the system transitioned into a subtropical storm on September 17. Humberto then weakened to a subtropical depression early the next day, about south of Ponta Delgada. The subtropical depression continued north-northwestward until degenerating into an open trough, and was soon absorbed by a cold front.


Hurricane Ingrid

A tropical wave spawned an area of low pressure in the Bay of Campeche early on September 12. Several hours later, it matured into a tropical depression about east-southeast of the city of Veracruz. Initially, the depression moved slowly due to weak steering currents. Around midday on September 13, the depression strengthened into Tropical Storm Ingrid. After initially moving westward toward Veracruz, the storm turned northeastward away from the coast. Favorable conditions allowed it to attain hurricane status on September 14, and the next day Ingrid attained peak winds of . Subsequently, heightened wind shear eroded the storm's convection. Caught between a trough over eastern Mexico and a ridge over the Southeastern United States, the storm turned sharply northwestward and later to the west. On September 16, Ingrid made landfall just south of La Pesca, Tamaulipas in northeastern Mexico as a strong tropical storm. Early on September 17, the storm weakened to a tropical depression, shortly before degenerating into an area of low pressure. Ingrid struck shortly after
Hurricane Manuel Hurricane Manuel () brought widespread flooding across much of Mexico in September 2013, in conjunction with Hurricane Ingrid. The fifteenth named storm and seventh hurricane of the annual hurricane season, Manuel originated from a strong a ...
on Mexico's Pacific coast, creating the first instance of two landfalling tropical cyclones in the nation within the same 24-hour period since 1958. The combined impacts of hurricanes Ingrid and Manuel affected two-thirds of Mexico, killing 192 people and causing $75 billion pesos (MXN, US$5.7 billion) in damage. Most of the destruction has been attributed to Manuel, but Ingrid was directly responsible for at least 23 deaths and $20 billion pesos (MXN, US$1.5 billion) in losses. The two storms produced approximately 5.7 trillion cubic feet (160 billion m3) of rainwater, equivalent to the combined volume of every reservoir in Mexico. Rainfall from the storm peaked at in Tuxpan, Veracruz. The rains caused widespread flooding that damaged at least 14,000 houses and hundreds of roads and bridges. In Tamaulipas, where the storm made landfall, the rainfall damaged crops and flooded rivers. The effects of the storm spread into southern
Texas Texas (, ; Spanish: ''Texas'', ''Tejas'') is a state in the South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2020, it is the second-largest U.S. state by ...
, causing high tides and some flooding. After Ingrid's onslaught, the Mexican government declared states of emergency in several municipalities. Relief agencies distributed food and other aid to the hardest hit areas, though in Tamaulipas, residents had to rely on assistance from the local Gulf Cartel.


Tropical Storm Jerry

A tropical wave exited the west coast of Africa on September 24. Interaction with a mid- to upper-level low pressure forced the wave to split, with the southern portion spawning Tropical Storm Octave in the eastern Pacific Ocean on October 12. As evidenced by scatterometer wind data, the northern portion moved north-northwestward and transitioned into a low-pressure area early on September 28. After convection gradually became better organized, a tropical depression developed early on September 29, about east-northeast of the Leeward Islands. The depression moved northeastward and initially struggled to intensify due to the presence of dry mid-level air. However, early on September 30, the depression strengthened into Tropical Storm Jerry while curving eastward. Shortly thereafter, vigorous deep
convection Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoyancy). When the cause of the conve ...
developed, allowing the storm to deepen further. At 00:00 UTC on October 1, Jerry attained its peak intensity with sustained winds of and a minimum barometric pressure of . However, strong wind shear soon weakened Jerry. Later on October 1, a blocking high pressure ridge briefly impeded the storm's northeastward motion, but it resumed moving in that direction by the following day. After losing all deep convection late on October 3, Jerry became extratropical at about southwest of the central Azores. The remnants persisted for a few days, until being absorbed by a larger extratropical low on October 6.


Tropical Storm Karen

On September 16, a tropical wave emerged into the Atlantic from the west coast of Africa. Minimal development occurred until the wave reached the western Caribbean Sea on September 27. Around that time, the wave encountered an upper-level trough, generating deep convection over the region. On September 28, a broad area of low pressure formed southeast of Jamaica. Based on surface observations, it is estimated that Tropical Storm Karen developed near the northeastern tip of the Yucatán Peninsula early on October 3. Despite a deteriorating cloud pattern, Karen deepened and peaked with winds of later that day. Wind shear and dry air caused the storm to weaken beginning early on October 4. Throughout the day, only sporadic bursts of deep convection occurred. The storm moved northwestward at inconsistent forward speeds around a low- to mid-level ridge. Early on October 6, Karen weakened to a tropical depression, and several hours later disintegrated into an open trough off the coast of Louisiana. Since the beginning of reconnaissance flights in 1943, Karen was one of few named storms to dissipate in the Gulf of Mexico without making landfall. While the storm was threatening the Gulf Coast of the United States, the NHC issued several tropical cyclone warnings and watches as Karen approached. Additionally, states of emergency were issued in portions of
Alabama (We dare defend our rights) , anthem = "Alabama" , image_map = Alabama in United States.svg , seat = Montgomery , LargestCity = Huntsville , LargestCounty = Baldwin County , LargestMetro = Greater Birmingham , area_total_km2 = 135,765 ...
, Louisiana,
Mississippi Mississippi () is a state in the Southeastern region of the United States, bordered to the north by Tennessee; to the east by Alabama; to the south by the Gulf of Mexico; to the southwest by Louisiana; and to the northwest by Arkansas. Miss ...
, and Florida. The mayor of the town of
Grand Isle, Louisiana Grand Isle is a town in Jefferson Parish in the U.S. state of Louisiana, located on a barrier island of the same name in the Gulf of Mexico. The island is at the mouth of Barataria Bay where it meets the gulf. The town of Grand Isle is statistica ...
evacuated the island on October 4, while residents were also ordered to flee
Lafourche Lafourche Parish (french: Paroisse de la Fourche) is a parish located in the south of the U.S. state of Louisiana. The parish seat is Thibodaux. The parish was formed in 1807. It was originally the northern part of Lafourche Interior Parish, whi ...
and Plaquemines parishes. The
Federal Emergency Management Agency The Federal Emergency Management Agency (FEMA) is an agency of the United States Department of Homeland Security (DHS), initially created under President Jimmy Carter by Presidential Reorganization Plan No. 3 of 1978 and implemented by two Ex ...
(FEMA) and the
United States Department of the Interior The United States Department of the Interior (DOI) is one of the executive departments of the U.S. federal government headquartered at the Main Interior Building, located at 1849 C Street NW in Washington, D.C. It is responsible for the ma ...
called back workers, furloughed because of the
government shutdown A government shutdown occurs when the legislative branch does not pass key bills which fund or authorize the operations of the executive branch, resulting in the cessation of some or all operations of a government. Government shutdowns in the Un ...
, to assist state and local agencies. Louisiana Governor Bobby Jindal authorized the mobilization of the state's
National Guard National Guard is the name used by a wide variety of current and historical uniformed organizations in different countries. The original National Guard was formed during the French Revolution around a cadre of defectors from the French Guards. Nat ...
members to active duty. Abnormally high tides were reported along the coast of Louisiana. At Grand Isle, tar balls from the
Deepwater Horizon oil spill The ''Deepwater Horizon'' oil spill (also referred to as the "BP oil spill") was an industrial disaster that began on 20 April 2010 off of the coast of the United States in the Gulf of Mexico on the BP-operated Macondo Prospect, considere ...
in 2010 were washed ashore. In Texas, the storm brought minor coastal flooding to
Brazoria County Brazoria County ( ) is a county in the U.S. state of Texas. As of the 2020 census, the population of the county was 372,031. The county seat is Angleton. Brazoria County is included in the Houston-The Woodlands-Sugar Land metropolitan statis ...
. Additionally, the moisture associated with the remnants of Karen was absorbed into a frontal system and caused minor flooding in a few states, including
Delaware Delaware ( ) is a state in the Mid-Atlantic region of the United States, bordering Maryland to its south and west; Pennsylvania to its north; and New Jersey and the Atlantic Ocean to its east. The state takes its name from the adjacent Del ...
, Georgia, New Jersey, and
Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, ...
.


Tropical Storm Lorenzo

A tropical wave exited the west coast of Africa and entered the Atlantic on October 11. Four days later, a mid- to upper-level trough increased convection along the northern portion of the wave. The southern portion of the wave continued westward, while the northern portion moved slowly west-northwestward and developed into a surface trough after interacting with a second mid to upper-level low. Eventually, the system transitioned into a broad surface low. Despite southwesterly vertical shear, deep convection began to increase by late on October 20. After becoming better defined, the system developed into a tropical depression at 06:00 UTC on October 21 while located about east-southeast of Bermuda. Six hours later, the depression strengthened into Tropical Storm Lorenzo. On October 21, the storm moved north-northeastward around the northwestern periphery of a mid-level ridge. Lorenzo strengthened further and peaked with sustained winds of and a minimum barometric pressure of at 12:00 UTC on October 22. Around that time, satellite imagery indicated increased banding and an eye-like feature. The cyclone then turned eastward in weak westerly low- to mid-level flow. Early on October 23, strong wind shear began impacting Lorenzo, causing the circulation to become exposed to deep convection. At 00:00 UTC on the following day, Lorenzo weakened to a tropical depression and dissipated into a remnant low 12 hours later. The low persisted for a few days, until it degenerated into an open trough on October 26. The remnants of Lorenzo fueled the St. Jude storm, which struck northern Europe with hurricane-force winds on October 27 and October 28.


Tropical Storm Melissa

Early on November 17, an extratropical low developed along a stationary front over the central Atlantic. It moved northward and became co-located with an upper-level low. After the fronts dissipated, deep convection began to initiate near the center. As a result, Subtropical Storm Melissa developed at 12:00 UTC on November 18, about east-southeast of Bermuda. Melissa moved generally northward and strengthened slightly on November 19, but weakened later that day after convection diminished. Early on November 20, convection increased again, and after the storm acquired a warm core, it was reclassified as a tropical storm. After becoming a tropical cyclone on November 20, Melissa accelerated northeastward and slowly strengthened. Later that day, the storm attained its peak intensity with sustained winds of and a minimum barometric pressure of . Amid colder ocean temperatures, Melissa lost all of its deep convection and transitioned into an extratropical cyclone at 00:00 UTC on November 22, at about north-northeast of Flores Island, Azores. The remnants merged with another system several hours later.


Unnamed subtropical storm

In early December, an upper-level trough became trapped in steering currents near the
British Isles The British Isles are a group of islands in the North Atlantic Ocean off the north-western coast of continental Europe, consisting of the islands of Great Britain, Ireland, the Isle of Man, the Inner and Outer Hebrides, the Northern Isles, ...
. When an upper-level low strengthened to its west, an extratropical cyclone formed in response on December 3. The cyclone then completed a counter-clockwise loop in response to the blocking area of
high pressure In science and engineering the study of high pressure examines its effects on materials and the design and construction of devices, such as a diamond anvil cell, which can create high pressure. By ''high pressure'' is usually meant pressures of th ...
to its north that would have otherwise caused the storm to move towards mainland Europe. Shortly thereafter, the radius of maximum winds—which are usually large in extratropical cyclones—began to contract, signifying the onset of a subtropical transition, despite being over
sea surface temperature Sea surface temperature (SST), or ocean surface temperature, is the ocean temperature close to the surface. The exact meaning of ''surface'' varies according to the measurement method used, but it is between and below the sea surface. Air mas ...
s. Low
wind shear Wind shear (or windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizont ...
in the area allowed the system to transition into a subtropical storm on December 5 on 00:00 UTC. However, the National Hurricane Center did not initiate advisories, particularly due to predictions of stronger wind shear and decreasing sea surface temperatures preventing additional development. The storm continued to show more signs of becoming tropical; however, it failed to complete the transition. By December 7, stronger wind shear and cooler waters took its toll on the system, and it weakened to a remnant low, dissipating shortly afterwards. The storm produced sustained winds of on
Santa Maria Island Santa Maria () is an island in the eastern group of the Azores archipelago (south of the island of São Miguel) and the southernmost island in the Azores. The island is known for its white sand beaches, distinctive chimneys, and dry warm weath ...
in the Azores, with gusts to . This was the first December subtropical or tropical storm since
Tropical Storm Olga The name Olga has been used for sixteen tropical cyclones worldwide: three in the Atlantic Ocean (where it replaced the name ''Opal''), ten in the Western Pacific Ocean, and three in the Australian region in Southern Hemisphere. In the Atlantic: * ...
in 2007, and the most recent as of 2022. Had the storm been named operationally, it would have received the name ''Nestor''.


Storm names

The following list of names was used for named storms that formed in the North Atlantic in 2013. The names not retired from this list were used again in the 2019 season. This was the same list used in the 2007 season, with the exceptions of Dorian, Fernand, and Nestor, which replaced
Dean Dean may refer to: People * Dean (given name) * Dean (surname), a surname of Anglo-Saxon English origin * Dean (South Korean singer), a stage name for singer Kwon Hyuk * Dean Delannoit, a Belgian singer most known by the mononym Dean Titles * ...
,
Felix Felix may refer to: * Felix (name), people and fictional characters with the name Places * Arabia Felix is the ancient Latin name of Yemen * Felix, Spain, a municipality of the province Almería, in the autonomous community of Andalusia, ...
, and Noel, respectively. The names Dorian and Fernand were used for the first time this year.


Retirement

On April 10, 2014, at the 36th session of the RA IV hurricane committee, the
World Meteorological Organization The World Meteorological Organization (WMO) is a specialized agency of the United Nations responsible for promoting international cooperation on atmospheric science, climatology, hydrology and geophysics. The WMO originated from the Intern ...
retired the name ''Ingrid'' from its rotating name lists due to the number of deaths and amount of damage it caused, and it will not be used again for another Atlantic hurricane. ''Ingrid'' was replaced with ''Imelda'' for the 2019 season.


Season effects

The following table lists all of the storms that formed in the 2013 Atlantic hurricane season. It includes: duration, name, intensity, areas affected, damages, and death totals. Deaths in parentheses are additional and indirect (an example of an indirect death would be a traffic accident), but were still related to that storm. Damage and deaths include totals while the storm was extratropical, a wave, or a low, and all of the damage figures are in 2013 USD.


See also

*
Tropical cyclones in 2013 Throughout 2013, 139 tropical cyclones formed in seven different areas called basins. Of these, 67 have been named by various weather agencies when they attained maximum sustained winds of 35 knots (65  km/h, 40  mph). The strong ...
* Lists of Atlantic hurricanes * Atlantic hurricane season *
2013 Pacific hurricane season The 2013 Pacific hurricane season was the first to see twenty named storms since 2009 but also had the ninth fewest ACE units on record, as many of the storms were weak and short-lived. The season officially began on May 15 in the Eastern Pa ...
*
2013 Pacific typhoon season The 2013 Pacific typhoon season was the most active Pacific typhoon season since 2004 Pacific typhoon season, 2004, and the deadliest since 1975 Pacific typhoon season. It featured Typhoon Haiyan, one of the most powerful storms in history. It w ...
*
2013 North Indian Ocean cyclone season The 2013 North Indian Ocean cyclone season was an event in the annual cycle of tropical cyclone formation, in which tropical cyclones formed in the North Indian Ocean and Arabian Sea. The season had no official bounds, but cyclones typically form ...
* South-West Indian Ocean cyclone seasons:
2012–13 1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. I ...
, 2013–14 * Australian region cyclone seasons:
2012–13 1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. I ...
, 2013–14 * South Pacific cyclone seasons:
2012–13 1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. I ...
, 2013–14 *
South Atlantic tropical cyclone South Atlantic tropical cyclones are unusual weather events that occur in the Southern Hemisphere. Strong wind shear, which disrupts the formation of cyclones, as well as a lack of weather disturbances favorable for development in the South Atl ...


Notes


References


External links


National Hurricane Center Website

National Hurricane Center's Atlantic Tropical Weather Outlook


{{Tropical cyclone season, 2013 Articles which contain graphical timelines
2013 File:2013 Events Collage V2.png, From left, clockwise: Edward Snowden becomes internationally famous for leaking classified NSA wiretapping information; Typhoon Haiyan kills over 6,000 in the Philippines and Southeast Asia; The Dhaka garment fa ...
2013 Atl