The season officially began on June 1, 2007, and ended on November 30, 2007, dates that conventionally delimit the period of each year when most
tropical cyclones develop in the Atlantic basin.[3] The season's first storm,
Subtropical Storm Andrea, developed from an extratropical cyclone that formed on May 6, and the last,
Tropical Storm Olga, dissipated on December 11. Altogether, there were 15
named tropical storms during the 2007 season. Six storms attained hurricane strength with two intensifying further into
major hurricanes.[nb 2]
This timeline includes information that was not operationally released, meaning that data from post-storm reviews by the
National Hurricane Center, such as a storm that was not operationally warned upon, has been included. This timeline documents tropical cyclone formations, strengthening, weakening,
landfalls,
extratropical transitions, and dissipations during the season.
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).[5] 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) prior to 2020 were:
Atlantic,
Eastern, and
Central.[6] In this timeline, all information is listed by UTC first with the respective regional time included in parentheses. Additionally, figures for
maximum sustained winds and position estimates are rounded to the nearest 5 units (
knots,
miles, or
kilometers), following the convention used in the
National Hurricane Center's products. 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.
^Hurricanes reaching Category 3 (wind speeds of 111 miles per hour (179 km/h)) or higher on the 5-level
Saffir–Simpson wind speed scale are considered major hurricanes.[4]
The season officially began on June 1, 2007, and ended on November 30, 2007, dates that conventionally delimit the period of each year when most
tropical cyclones develop in the Atlantic basin.[3] The season's first storm,
Subtropical Storm Andrea, developed from an extratropical cyclone that formed on May 6, and the last,
Tropical Storm Olga, dissipated on December 11. Altogether, there were 15
named tropical storms during the 2007 season. Six storms attained hurricane strength with two intensifying further into
major hurricanes.[nb 2]
This timeline includes information that was not operationally released, meaning that data from post-storm reviews by the
National Hurricane Center, such as a storm that was not operationally warned upon, has been included. This timeline documents tropical cyclone formations, strengthening, weakening,
landfalls,
extratropical transitions, and dissipations during the season.
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).[5] 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) prior to 2020 were:
Atlantic,
Eastern, and
Central.[6] In this timeline, all information is listed by UTC first with the respective regional time included in parentheses. Additionally, figures for
maximum sustained winds and position estimates are rounded to the nearest 5 units (
knots,
miles, or
kilometers), following the convention used in the
National Hurricane Center's products. 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.
^Hurricanes reaching Category 3 (wind speeds of 111 miles per hour (179 km/h)) or higher on the 5-level
Saffir–Simpson wind speed scale are considered major hurricanes.[4]