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The 2004 Atlantic hurricane season was a very deadly, destructive, and extremely active Atlantic hurricane season, with over 3,200&nbsp;deaths and more than $60.4&nbsp;billion (2004 USD) in damage. More than half of the 16&nbsp;tropical cyclones brushed or struck the United States. Due to the development of a Modoki El Niño – a rare type of El Niño in which unfavorable conditions are produced over the Eastern Pacific instead of the Atlantic basin due to warmer sea surface temperatures farther west along the equatorial Pacific &ndash; activity was above average. The season officially began on June&nbsp;1 and ended on November&nbsp;30, though the season's last storm, Otto, dissipated on December&nbsp;3, extending the season beyond its traditional boundaries. The first storm, Alex, developed offshore of the Southeastern United States on July&nbsp;31, one of the latest dates on record to see the formation of the first system in an Atlantic hurricane season. It brushed the Carolinas and the Mid-Atlantic, causing one death and $7.5&nbsp;million (2004&nbsp;USD) in damage. Several other storms caused only minor impacts, if any. The season was the first to exceed 200 units in accumulated cyclone energy (ACE) since 1995, mostly from Hurricane Ivan, which produced the highest ACE out of any storm this season. Ivan generated the second-highest ACE in the Atlantic, only behind the 1899 San Ciriaco Hurricane.

There are four notable storms: Hurricane Charley, that made landfall in Florida as a Category&nbsp;4 hurricane on the Saffir–Simpson hurricane wind scale (SSHWS), causing over $17&nbsp;billion in damage in the United States alone. Later in August, Hurricane Frances struck the Bahamas and Florida, causing at least 49&nbsp;deaths and $9.67&nbsp;billion in damage. The costliest and most intense storm was Hurricane Ivan. It was a Category 5 hurricane that devastated multiple countries adjacent to the Caribbean, before entering the Gulf of Mexico and causing catastrophic damage on the Gulf Coast of the United States, especially in the states of Alabama and Florida. Throughout the countries it passed through, Ivan caused 124&nbsp;fatalities and over $26.1&nbsp;billion in damage. The deadliest storm was Hurricane Jeanne, which caused torrential rainfall in the mountainous areas of Haiti, resulting in mudslides and severe flooding that caused at least 3,000&nbsp;fatalities. Jeanne also struck Florida, inflicting extensive destruction. Overall, the storm caused at least $7.63&nbsp;billion in damage and 3,042&nbsp;deaths, ranking it as one of the deadliest Atlantic hurricanes in history.

Collectively, the storms of this season caused at least 3,261&nbsp;deaths and about $60.4&nbsp;billion in damage, making it the costliest Atlantic hurricane season at the time, until surpassed by the following year. As of 2026, it ranks as the seventh costliest Atlantic hurricane season to date. With six hurricanes reaching at least Category&nbsp;3 intensity, the most major hurricanes since 1950, and 1996. However, that record would also be surpassed by 2005 and 2020, with seven major hurricanes in those years. In the spring of 2005, four names were retired: Charley, Frances, Ivan, and Jeanne. This tied the then-record most names retired with 1955 and 1995, a mark also surpassed in 2005, when five were retired.

Seasonal forecasts

{| class="toccolours" cellspacing=0 cellpadding=3 style="float:right; margin-left:1em; text-align:right; clear: right;"

|+Predictions of tropical activity in the 2004 season

|- style="background:#CFCFCF; text-align:center;×÷≥"

|align="center"|Source

|align="center"|Date

|align="center"|<span style="font-size: 80%;">Named<br />storms</span>

|align="center"|<span style="font-size: 80%;">Hurricanes</span>

|align="center"|<span style="font-size: 80%;">Major<br />hurricanes</span>

|-

|align="left"|CSU

|align="left"|Average <span style="font-size: 80%;">(1950–2000)</span>

|9.6

|5.9

|2.3

|-

|align="left"|NOAA

|align="left"|Average

|11

|6

|2

|-

|align="left"|CSU

|align="left"|December 5, 2003

|13

|7

|3

|-

|align="left"|CSU

|align="left"|April 2, 2004

|14

|8

|3

|-

|align="left"|NOAA

|align="left"|May 17, 2004

|12–15

|6–8

|2–4

|-

|align="left"|CSU

|align="left"|May 28, 2004

|14

|8

|3

|-

|align="left"|CSU

|align="left"|August 6, 2004

|13

|7

|3

|-

|align="left"|CSU

|align="left"|September 3, 2004

|16

|8

|5

|-

|align="left"|CSU

|align="left"|October 1, 2004

|15

|9

|6

|-

| style="text-align:center;" colspan="2"|Actual activity

|15

|9

|6

|}

Since 1984, forecasts of hurricane activity have been issued before each hurricane season by noted hurricane expert Dr. William M. Gray and his associates at Colorado State University (CSU), and separately by forecasters with the U.S. Government's National Oceanic and Atmospheric Administration (NOAA). According to CSU, the average season between 1950 and 2000 had 9.6&nbsp;tropical storms, 5.9&nbsp;hurricanes, and 2.3&nbsp;major hurricanes, which are Category&nbsp;3 or higher on the Saffir-Simpson hurricane wind scale. A normal season, as defined by NOAA, has 12.1&nbsp;named storms, of which 6.4&nbsp;reach hurricane strength and 2.7&nbsp;become major hurricanes.

CSU released its first prediction on December&nbsp;5, 2003, which projected an above average season, with 13&nbsp;named storms, seven hurricanes, and three major hurricanes. This forecast was adjusted upward slightly on April&nbsp;2. On May&nbsp;17, prior to the start of the season, NOAA forecasters predicted a 50% probability of activity above the normal range, with twelve to fifteen tropical storms, six to eight of those becoming hurricanes, and two to four those hurricanes reaching major intensity. Dr. Gray released a prediction on May&nbsp;28 that was similar, with 14 named storms, eight reaching hurricane strength, and three becoming major hurricanes.

After the season began, Dr. Gray announced he had revised his predictions slightly downwards on August&nbsp;6, citing mild El Niño conditions. His new forecast was thirteen named storms, seven hurricanes, and three reaching major hurricane intensity. On August&nbsp;10, NOAA released an updated prediction as well, with a 90% probability of above-to-near normal activity, but the same number of storms forecast. CSU issued another forecast on September&nbsp;3, indicating sixteen tropical storms, eight hurricanes, and five major hurricanes. The season ended up with sixteen tropical depressions, fifteen named storms, nine hurricanes, and six major hurricanes, which matched CSU's final prediction on October&nbsp;1.

Seasonal summary

thumb|right|Map of counties in the United States designated as disaster areas in the aftermath of a storm(s)

The Atlantic hurricane season officially began on June&nbsp;1, 2004. Five hurricanes and three tropical storms made landfall during the season and caused 3,270&nbsp;deaths and about $60.4&nbsp;billion in damage. Additionally, Hurricane Alex caused damage and one fatality, but it did not make landfall. August was an unusually active month, with eight named storms, including Alex, Bonnie, Charley, Danielle, Earl, Frances, Gaston, and Hermine. This new record was tied in 2012. On average, there are only three tropical storms and one to two hurricanes in August. Of the eight systems that month, five became hurricanes and three strengthened further into major hurricanes. A total of five tropical cyclones developed in September, including the most intense system of the season, Hurricane Ivan. Activity decreased further in October, with the formation of only two systems, Tropical Storm Matthew and Subtropical Storm Nicole. The season then went dormant for over a month and a half, until Tropical Storm Otto developed on November&nbsp;29. Otto was the final tropical cyclone of the season and degenerated into a remnant low pressure on December&nbsp;3. one of the highest values on record in the basin. ACE is, broadly speaking, a measure of the power of the hurricane multiplied by the length of time it existed, so storms that last a long time, as well as particularly strong hurricanes, have high ACEs. It is only calculated for full advisories on tropical systems at or exceeding , which is tropical storm strength. A few other tropical cyclones caused light to moderate damage, including Hurricanes Alex and Gaston and Tropical Storms Bonnie and Matthew. In addition to the 16&nbsp;tropical cyclones of the season, a tropical low in May brought torrential flooding to Haiti and the Dominican Republic, killing 2,000&nbsp;people and causing extensive damage. Although the system was not officially classified as a tropical storm, it did have a circulation with loosely organized convection, resembling a subtropical cyclone.

Records

The 2004&nbsp;season had numerous unusual occurrences and set many records. However, most of them were surpassed by the following year. With six hurricanes reaching at least Category 3 intensity, 2004 also had the most major hurricanes since 1996, a record which would be surpassed in 2005. There were many other hurricanes in the season that were individually unusual. Hurricane Alex was the strongest hurricane on record to intensify north of 38°N latitude. Hurricane Ivan was the most unusual storm of the season. Ivan became the southernmost Category 4 hurricane on record in the Atlantic basin, as well as the first major hurricane in the Atlantic on record to form as low as 10°N latitude. Additionally, hurricanes Charley and Ivan ranked as the third and second costliest hurricanes in the United States at the time, respectively, behind only Hurricane Andrew.

Systems

Hurricane Alex

The interaction between a trough and tropical wave resulted in the development of a tropical depression on July&nbsp;31, while centered about east of Jacksonville, Florida. After initially being poorly organized, the depression strengthened into Tropical Storm Alex late on August&nbsp;1. The storm tracked northeastward and became a hurricane on August&nbsp;3. As Alex moved out to sea, it intensified into a Category&nbsp;3 hurricane and peaked with winds of . Alex reached major hurricane status second farthest north in the Atlantic, after Hurricane Ellen in 1973. Eventually, Alex weakened due to cooler sea surface temperatures. The hurricane fell to tropical storm intensity around 12:00&nbsp;UTC on August&nbsp;6. Six hours later, it became extratropical while located about east of Cape Race, Newfoundland, and was soon absorbed by a large extratropical cyclone. The combination of strong winds and the storm surge damaged more than 100 buildings and houses. At Ocracoke, coastal flooding was considered the worst since Hurricane Gloria in 1985.

Tropical Storm Bonnie

A tropical wave developed into Tropical Depression Two on August&nbsp;3, while located about east of Barbados. The depression crossed the Lesser Antilles on August&nbsp;4, before degenerating back into a tropical wave. The remnants traversed the Caribbean Sea, and re-developed into Tropical Depression Two on August&nbsp;8. The depression strengthened further upon reaching the Gulf of Mexico and was upgraded to Tropical Storm Bonnie on August&nbsp;9. A break in a mid-level ridge re-curved Bonnie northward on August&nbsp;10 and then northeastward on August&nbsp;11. Later that day, the storm peaked with winds of , before wind shear began weakening it. At 14:00&nbsp;UTC on August&nbsp;12, Bonnie made landfall near Apalachicola, Florida with winds of . The storm rapidly weakened inland and degenerated as a remnant low offshore of New Jersey on August&nbsp;14.

In the Lesser Antilles, the storm brought light winds and mostly localized flooding to Saint Vincent and the Grenadines. The regenerated system brought light rainfall to the Yucatán Peninsula. In North Florida, scattered power outages were reported, and rainfall and storm surge flooded roads, especially in Taylor County. A tornado in Jacksonville damaged several businesses and homes. Tornadoes were also reported in The Carolinas, and Virginia, with one in North Carolina destroying 17&nbsp;homes and impacting 59&nbsp;others. It also caused three deaths and $1.27&nbsp;million in damage. Minor flooding also occurred in Mid-Atlantic and New England.

Hurricane Charley

A tropical wave developed into Tropical Depression Three on August&nbsp;9 to the south-southeast of Barbados. Early on August&nbsp;10, it was upgraded to Tropical Storm Charley, before reaching hurricane intensity south of Jamaica on August&nbsp;11. Charley continued to strengthen after curving northwestward and was a Category&nbsp;3 hurricane when it made landfall near Alquízar, Cuba on August&nbsp;13. After emerging into the Straits of Florida, Charley weakened to a Category&nbsp;2 hurricane. However, the storm abruptly strengthened into a Category&nbsp;4 hurricane later on August&nbsp;13, with winds peaking at . At 19:45&nbsp;UTC on August&nbsp;13, Charley made landfall at Cayo Costa, Florida, followed by another landfall in Punta Gorda about an hour later. Charley rapidly weakened over Florida, falling to Category&nbsp;1 by early on August&nbsp;14. Later that day, the storm emerged into the Atlantic, before making two more landfalls in Cape Romain and Myrtle Beach, South Carolina as a minimal hurricane. Late on August&nbsp;14, Charley weakened to a tropical storm over southeastern North Carolina, shortly before becoming extratropical near Virginia Beach, Virginia.

The storm brought rainfall and strong winds to the island of Jamaica. In Westmoreland Parish, flooding inundated several homes and damaged roadways. Winds in the parish caused a large tree to fall on a house, resulting in significant damage to the home. In Kingston, high winds damaged power lines and homes. Widespread power outages occurred due to numerous downed trees and power lines. The storm left $4.1&nbsp;million in damage and one fatality in Jamaica. Winds up to in Cuba left all of Pinar del Río Province and more than 50% of La Habana Province without electricity for several days. At least 70,290&nbsp;homes and about 3,000&nbsp;agricultural buildings were either damaged or destroyed. Nearly 1,500 power lines and 28 wire towers were downed by Charley. Roughly 95% of sugar cane, bean, and banana crops were ruined, and around 57,000&nbsp;acres (230&nbsp;km<sup>2</sup>) of fruit trees were destroyed. There were four deaths and $923&nbsp;million in damage. Charley caused 24&nbsp;deaths and 792&nbsp;injuries. Agricultural losses were heavy, especially to oranges. Damage to agriculture totaled about $2.2&nbsp;billion. In South Carolina, 2,231&nbsp;houses were damaged, with 2,317&nbsp;of those severely damaged and 40&nbsp;were destroyed. Approximately 141,000&nbsp;people were left without electricity. Port Charlotte was left without electricity for 13 days. Winds up to in North Carolina downed trees and power lines, and left 65,000&nbsp;homes without power. Charley destroyed 40&nbsp;houses and damaged 2,231&nbsp;other homes in the state. one of which damaged twenty structures. Throughout the United States, the storm caused $16&nbsp;billion in damage,

Hurricane Danielle

A tropical wave developed into Tropical Depression Four while south-southeast of Cape Verde on August&nbsp;13. Although sea surface temperatures were only marginally warm, the depression strengthened into Tropical Storm Danielle early on August&nbsp;14. Further intensification occurred and by early on August&nbsp;15, Danielle reached hurricane status. The storm deepened significantly over the next 24&nbsp;hours and became a Category&nbsp;2 hurricane. Later on August&nbsp;16, Danielle peaked as strong Category&nbsp;2 hurricane with winds of and a minimum barometric pressure of . leading to the formation of Tropical Depression Five at 1800&nbsp;UTC on August&nbsp;13, situated roughly 1000&nbsp;mi (1610&nbsp;km) east of the Lesser Antilles. The depression progressed rapidly west-northwest the following day, embedded and under the influence of a deep easterly flow around the southern periphery of a subtropical ridge to the cyclone's north. By the afternoon of August&nbsp;14, the depression strengthened into Tropical Storm Earl, situated 325&nbsp;mi (525&nbsp;km/h) east of Barbados. Within an environment characterized by low wind shear, high atmospheric humidity, and warm sea surface temperatures, Earl intensified, reaching a peak intensity of 50&nbsp;mph (85&nbsp;km/h) by 0600&nbsp;UTC on August&nbsp;15. However, Earl degenerated into an tropical wave and dissipated shortly after passing through the Leeward Islands, possibly due to its fast forward motion. The remnant wave eventually entered the eastern Pacific Ocean, developing into Hurricane Frank on August&nbsp;23.

Tropical storm warnings were issued from Trinidad to St. Lucia, leading to airport closures across the region. Hundreds of people evacuated to shelters in Grenada. In Grenada, Earl produced heavy rains and strong winds. The winds damaged the roofs of 34&nbsp;homes, while also knocking down trees and power lines. Heavy rains triggered flooding as well as nine mudslides and three rockslides. On St Vincent and the Grenadines, the winds destroyed two roofs and also damaged banana trees. In Tobago, wind damage to trees and power lines cut power to 90% of the island.

In the Bahamas, about 75% of residents lost electricity. Between 13 and 17&nbsp;percent of the non-native Australian pine on San Salvador Island experienced damage, primarily from snapping, though some browning from salt spray was noted. Several feet of water flooded the international airport at Freeport. Insured losses reached about $300&nbsp;million. Severe damage was also dealt to banana, corn, and pineapple crops. About 4,160&nbsp;homes received minor damage, while 2,522&nbsp;houses were rendered uninhabitable or destroyed. About 700&nbsp;people were left homeless. Additionally, sea walls, schools, bridges, roads, and docks were damaged. Strong winds brought severe damage to Florida, especially counties along the east coast. Hundreds of homes, mobile homes, and businesses were destroyed in Indian River, Martin, and St. Lucie counties, and damage was inflicted on thousands of other structures there. In the tri-county area alone, damage totaled approximately $4.5&nbsp;billion. Palm Beach County also suffered particularly severely, with 15,000&nbsp;houses and 2,400&nbsp;businesses damaged there. About 4.27&nbsp;million customers were left without electricity in Florida. Frances and its remnants brought extensive flooding to other states, especially in Georgia, North Carolina, Ohio, and Pennsylvania.

In South Carolina, an unofficial measurement indicated wind gusts up to in South Capers Island, which is near Parris Island. There were nine fatalities. Throughout the United States, Gaston caused about $130&nbsp;million in damage.

Tropical Storm Hermine

The frontal zone that spawned Hurricane Gaston developed an area of convection south of Bermuda on August&nbsp;25. After detaching from the front and developing a circulation, the system became a tropical depression at 18:00&nbsp;UTC on August&nbsp;27. It initially remained weak while the convection fluctuated, until intensifying into Tropical Storm Hermine at 12:00&nbsp;UTC on August&nbsp;29. Later that day, wind shear exposed the circulation to the north of the convection, though the storm was able to a peak as a tropical storm on August&nbsp;30. Increased wind shear from Gaston weakened Hermine. By late on August&nbsp;30, the circulation was entirely exposed from the convection.

Early on August&nbsp;31, Hermine made landfall near New Bedford, Massachusetts as a minimal tropical storm. It rapidly weakened while moving northward, and after becoming extratropical, Hermine was absorbed by a frontal zone later that day. The storm brought tropical storm force winds and light rainfall to eastern Massachusetts, reaching about on Cape Cod.

Hurricane Ivan

A westward-moving tropical wave developed into a tropical depression on September&nbsp;2, before becoming Tropical Storm Ivan on the following day. Tracking westward, Ivan gradually strengthened, reaching hurricane intensity on September&nbsp;5. On September&nbsp;6, the storm strengthened significantly, becoming a Category&nbsp;4 hurricane, despite being located at an unusually low latitude. It subsequently weakened, though it reached major hurricane status again the next day. Late on September&nbsp;7, Ivan passed close to Grenada while heading west-northwestward. Although located near the Netherlands Antilles on September&nbsp;9, Ivan briefly became a Category&nbsp;5 hurricane. During the next five days, Ivan fluctuated between a Category&nbsp;4 and 5&nbsp;hurricane. The storm passed south of Jamaica on September&nbsp;11 and then the Cayman Islands on the next day. Although curving northwestward, Ivan brushed western Cuba as a Category&nbsp;5 hurricane on September&nbsp;14.

Throughout the Lesser Antilles and in Venezuela, Ivan caused 44&nbsp;deaths and slightly more than $1.15&nbsp;billion in losses, with nearly all of the damage and fatalities in Grenada. Similar impact occurred in Alabama. Property damage was major along Perdido Bay, Big Lagoon, Bayou Grande, Pensacola Bay and Escambia Bay. A number of homes were completely washed away by the high surge. Further inland, thousands of other houses were damaged or destroyed in many counties. Throughout the United States, the hurricane left 54&nbsp;fatalities and $20.5&nbsp;billion in damage.

Tropical Depression Ten

A tropical wave accompanied with a well-organized area of convection emerged off the western coast of Africa on August&nbsp;29. Performing a slow curve over the eastern Atlantic, the wave became increasingly less-defined over subsequent days as a result of strong southwesterly wind shear. Following the development of shower and thunderstorm activity near the center, the system acquired enough organization to be deemed a tropical depression at 12:00&nbsp;UTC on September&nbsp;7, while positioned about southwest of the southernmost Azores. Hostile environmental conditions caused the depression to remain below tropical storm intensity and subsequently degenerate into a remnant low by 12:00&nbsp;UTC on September&nbsp;9 after the center decoupled from the remainder of the convective activity. The low-level circulation persisted near the Azores until dissipating the following day.

Hurricane Jeanne

Tropical Depression Eleven developed from a tropical wave at 18:00&nbsp;UTC on September&nbsp;13, while located about east-southeast of Guadeloupe. After crossing the island while moving west-northwestward, the depression intensified into Tropical Storm Jeanne around midday on September&nbsp;14. It strengthened further in the Caribbean Sea, before making landfall near Guayama, Puerto Rico with winds of at 16:00&nbsp;UTC the following day. Hours later, Jeanne emerged into the Mona Passage and resumed deepening, becoming at Category&nbsp;1 hurricane at midday on September&nbsp;16. Around that time, the hurricane made another landfall at the eastern tip of Dominican Republic with winds of . By early on September&nbsp;17, Jeanne weakened to a tropical storm due to its slow movement over the rough terrain of Hispaniola, and briefly fell to tropical depression intensity at 18:00&nbsp;UTC. After re-emerging into the Atlantic, the storm then moved generally northward. After the system passed between the eastern Bahamas and Turks and Caicos Islands on September&nbsp;18, slow re-intensification occurred.

Late on September&nbsp;20, Jeanne again became a Category&nbsp;1 hurricane; around that time, it began to execute an anti-cyclonic loop. The storm moved eastward, before a trough of low pressure caused Jeanne to curve southeastward. Early on September&nbsp;22, the system strengthened into a Category&nbsp;2 hurricane. A deep-layer ridge slowly curved Jeanne to the west by the following day, around the time it weakened to a Category&nbsp;1 hurricane due to upwelled waters. However, the storm began re-intensifying on September&nbsp;24, becoming a Category&nbsp;2 hurricane again that day and a Category&nbsp;3 by September&nbsp;25. At 14:00&nbsp;UTC on the latter, Jeanne struck the Abaco Islands in the Bahamas with winds of . The hurricane strengthened slightly further, peaking with maximum sustained winds of . Jeanne made its final landfall on Hutchinson Island, Florida at the same time around 04:00&nbsp;UTC on September&nbsp;26. It quickly weakened after moving inland and fell to tropical storm intensity only 14&nbsp;hours later. Curving northward, Jeanne decayed to a tropical depression over Georgia late on September&nbsp;27. Jeanne turned northeastward and became extratropical over Virginia after about 24&nbsp;hours. The remnants briefly re-strengthened after moving offshore the Delmarva Peninsula, but dissipated late on September&nbsp;29. Similar impact was reported in Puerto Rico, with heavy precipitation causing flooding and mudslides. There was also heavy damage to crops, schools, houses, and businesses. Strong wind gusts left 70% of the island without power. Jeanne resulted in $169.9&nbsp;million in damage and eight deaths. In the Bahamas, communications were disrupted and some homes were inundated by storm surge in the Abaco Islands. Similar impact was reported on Grand Bahama, with several houses and the airport being flooded. Further, winds tore-off and damaged a number of roofs. Throughout the state of Florida, strong winds were observed, leaving approximately 3.44&nbsp;million people without electricity. Several other states experienced severe flooding. Due to healthy outflow around an upper-level anticyclone and warm sea surface temperatures of the year, rapid deepening began on the evening of September 17, with the storm developing a small eye. Karl intensified into a hurricane early on September&nbsp;18. The storm briefly deepened to a Category&nbsp;4 hurricane on September&nbsp;20, before weakening slightly and subsequently re-strengthening to that intensity. With a steadily increasing wind field, Karl peaked with maximum sustained winds of early on September&nbsp;21 while resuming a northwestward motion. as well as an eyewall replacement cycle. The hurricane weakened to a Category&nbsp;2 hurricane on September 22 as it curved to the northeast in response to a baroclinic trough. Karl briefly became a major hurricane again on September&nbsp;23. Another trough re-curved Karl northward on September&nbsp;24 as the storm was gradually weakening. Early on September&nbsp;25, Karl became extratropical while located about east of Cape Race, Newfoundland. The remnants of Karl accelerated northeastward and then east-northeastward, later moving through the Faroe Islands. Sustained winds up to and gusts reaching were observed on Mykines. During the next several days, the storm fluctuated in intensity, from a tropical depression to a strong tropical storm. A deep mid- to upper-level trough caused Lisa to turn northward on September&nbsp;25.

In anticipation of Matthew, The National Hurricane Center issued a Tropical Storm Warning from the Florida/Alabama border to Intracoastal City, Louisiana. Oyster harvesting sites were closed to avoid bacterial contamination from potential storm surge. Matthew produced heavy rainfall across its path, reaching as far east as Florida, and as far inland as northeastern Ohio. Damage reached $255,000 in Louisiana and $50,000 in Mississippi. In Louisiana, rainfall peaked at in Haynesville. Dozens of homes were flooded, with 20&nbsp;homes damaged in Terrebonne Parish. The storm also left about 2,500&nbsp;people without power. Several roads closed due to floods or were impacted by fallen trees. Wind gusts reached at the mouth of the Mississippi River. The system gradually became better organized. Around 00:00&nbsp;UTC on October 10, an extratropical cyclone formed with a well-defined low-level circulation. By six hours later, a curved rainband formed, signaling that the cyclone transitioned into Subtropical Storm Nicole about southwest of Bermuda. There was a broad wind field, with the strongest winds more than from the center. It intensified to reach peak winds of , but strong wind shear prevented Nicole from transitioning into a tropical cyclone. Late on October 11, Nicole was absorbed by a larger extratropical cyclone to its north. Poor weather conditions forced the cancellation of several events at the Bermuda Music Festival. Strong winds knocked down power lines, leaving over 1,800 homes and businesses without power. Unsettled conditions also resulted in airport delays. High winds delayed or altered the courses of four cruise ships, and a seasick passenger had to be taken to the hospital. Due to moisture from Nicole combined with the extratropical storm, the Atlantic Storm Prediction Centre issued heavy rainfall and wind warnings for large portions of the Canadian Maritimes. The remnants of Nicole combined with a powerful extratropical cyclone to produce strong winds across the Maritimes, reaching on western Cape Breton. The strong winds knocked down trees and power lines, while heavy rainfall over caused flooding in eastern Nova Scotia. Travel by ferry and across the Confederation Bridge was restricted. Wind gusts reached across Maine. The winds downed trees and power lines, causing power outages in coastal portions of Washington and Hancock Counties.

Tropical Storm Otto

A cold front and a strong upper-level trough interacted, resulting in the development of an extratropical low-pressure area on November&nbsp;26. After losing frontal characteristics, the system transitioned into Subtropical Storm Otto at 12:00&nbsp;UTC on November&nbsp;29, while located about east-southeast of Bermuda. Initially, the storm moved northwestward due to a weakness in a subtropical ridge. Late on November&nbsp;29, Otto attained its maximum sustained wind speed of . Deep convection formed near the center and the storm began transitioning to a warm core system.

The system was re-classified as Tropical Storm Otto at 12:00&nbsp;UTC on November&nbsp;30, although it is possible that Otto transitioned to a fully tropical cyclone one day earlier, on November&nbsp;29. This was the same list used for the 1998 season, except for Gaston and Matthew, which replaced Georges and Mitch respectively. Storms were named Gaston, Matthew, and Otto for the first time in 2004.

{| style="width:90%;"

|

  • Alex
  • Bonnie
  • Charley
  • Danielle
  • Earl
  • Frances
  • Gaston

|

  • Hermine
  • Ivan
  • Jeanne
  • Karl
  • Lisa
  • Matthew
  • Nicole

|

  • Otto

|}

Retirement

In the spring of 2005, The World Meteorological Organization retired the names of four destructive and deadly storms from the Atlantic hurricanes name lists: Charley, Frances, Ivan, and Jeanne. They were replaced with Colin, Fiona, Igor, and Julia, for the 2010 season. As of , the 2004 season is one of four seasons to have four names retired, along with 1955, 1995, and 2017. Only the 2005 season has had morewith five names retired.

Season effects

This is a table of all of the storms that formed in the 2004 Atlantic hurricane season. It includes their name, duration, peak classification and intensities, areas affected, damage, 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 2004 USD.

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See also

  • Tropical cyclones in 2004
  • 2004 Pacific hurricane season
  • 2004 Pacific typhoon season
  • 2004 North Indian Ocean cyclone season
  • South-West Indian Ocean cyclone seasons: 2003–04, 2004–05
  • Australian region cyclone seasons: 2003–04, 2004–05
  • South Pacific cyclone seasons: 2003–04, 2004–05

Notes

References

  • Satellite movie of 2004 Atlantic hurricane season
  • 2004 NHC Tropical Cyclone Advisory Archive
  • U.S. Rainfall from Tropical Cyclones in 2004
  • Effects of the Third-Quarter Hurricanes on Income Measures