| Timeline of the 2004 Atlantic hurricane season | |||||
|---|---|---|---|---|---|
| Season summary map | |||||
| Season boundaries | |||||
| First system formed | July 31, 2004 | ||||
| Last system dissipated | December 3, 2004 | ||||
| Strongest system | |||||
| Name | Ivan | ||||
| Maximum winds | 165 mph (270 km/h) (1-minute sustained) | ||||
| Lowest pressure | 910 mbar (hPa; 26.87 inHg) | ||||
| Longest lasting system | |||||
| Name | Ivan | ||||
| Duration | 17.5 days | ||||
| |||||
The 2004 Atlantic hurricane season was notable as one of the deadliest and most costly Atlantic hurricane seasons on record. It officially began on June 1, 2004, and ended on November 30, although storm activity continued into December. This season had 16 tropical depressions, of which, 15 became named storms. Of these, 9 strengthened into hurricanes with 6 intensifying into major hurricanes. [nb 1] The most noteworthy storms for the season were the five named storms that made landfall in the U.S. states of Florida and Alabama, three of them with at least 115 mph (185 km/h) sustained winds (major hurricane strength): Tropical Storm Bonnie, Charley, Frances, Ivan, and Jeanne. This is the only time in recorded history that four hurricanes affected the U.S. State of Florida although one of the four, Ivan, brought hurricane-force winds to the state without making a landfall there. [2]
This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season. It includes information that was not released throughout the season, meaning that data from post-storm reviews by the National Hurricane Center, such as a storm that was not initially warned upon, has been included.
The time stamp for each event is first stated using Coordinated Universal Time (UTC), the 24-hour clock where 00:00 = midnight UTC. [3] The NHC uses both UTC and the time zone where the center of the tropical cyclone is currently located. The time zones utilized (east to west) prior to 2020 were: Atlantic, Eastern, and Central. [4] In this timeline, the respective area time is included in parentheses. Additionally, figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (miles, or kilometers), following National Hurricane Center practice. Direct wind observations are rounded to the nearest whole number. Atmospheric pressures are listed to the nearest millibar and nearest hundredth of an inch of mercury.
