Timeline of the 2023 Atlantic hurricane season | |||||
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![]() Season summary map | |||||
Season boundaries | |||||
First system formed | January 16, 2023 | ||||
Last system dissipated | October 28, 2023 | ||||
Strongest system | |||||
Name | Lee | ||||
Maximum winds | 165 mph (270 km/h) (1-minute sustained) | ||||
Lowest pressure | 926 mbar (hPa; 27.35 inHg) | ||||
Longest lasting system | |||||
Name | Philippe | ||||
Duration | 13.25 days | ||||
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The 2023 Atlantic hurricane season saw an above average number of named storms and an average number of hurricanes and major hurricanes (category 3 or higher on the 5-level Saffir–Simpson wind speed scale). There were twenty named storms during the season;[nb 1] seven of them strengthened into hurricanes, and three of those reached major hurricane intensity.[1] The season officially began on June 1, 2023, and ended on November 30. These dates, adopted by convention, historically describe the period in each year when most subtropical or tropical cyclones form in the Atlantic.[2] However, tropical cyclone formation is possible at any time of the year, as was the case this season, when an unnamed subtropical storm formed on January 16.[3] The last system to dissipate was Hurricane Tammy, on October 28.
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.
By convention, meteorologists use one time zone when issuing forecasts and making observations: Coordinated Universal Time (UTC), and also use the 24-hour clock (where 00:00 = midnight UTC).[4] The National Hurricane Center uses both UTC and the time zone where the center of the tropical cyclone is currently located. The time zones utilized (east to west) are: Greenwich, Cape Verde, Atlantic, Eastern, and Central.[5] In this timeline, all information is listed by UTC first, with the respective regional time zone included in parentheses. Additionally, figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (knots, 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.
January 16
January 17
June 1
June 2
June 3
June 19
June 22
June 23
June 24
June 26
July 14
July 16
July 17
July 18
July 22
July 23
July 24
August 19
August 20
August 21
August 22
August 23
August 26
August 27
August 28
August 29
August 30
August 31
September 1
September 2
September 3
September 4
September 5
September 6
September 7
September 8
September 9
September 10
September 11
September 12
September 13
September 14
September 15
September 16
September 17
September 18
September 19
September 20
September 22
September 23
September 24
September 25
September 28
September 29
October 1
October 2
October 6
October 10
October 11
October 12
October 14
October 15
October 18
October 20
October 22
October 23
October 24
October 25
October 26
October 27
October 29
November 30