Timeline of the 1988 Atlantic hurricane season

The 1988 Atlantic hurricane season was a cycle of the annual tropical cyclone season in the Atlantic Ocean in the Northern Hemisphere. There was average activity during the season, which officially began on June 1, 1988 and ended on November 30, 1988. These dates, adopted by convention, historically describe the period in each year when most tropical systems form.

Altogether, 12 named storms formed during the season; 5 of them attained hurricane status, of which 3 became major hurricanes. At Category 5 on the Saffir–Simpson scale, Hurricane Gilbert was the most intense tropical cyclone of the season, with sustained winds of 185 mph (295 km/h) and an atmospheric pressure of 888 mbar (26.22 inHg). It made landfall in Jamaica, the Yucatán Peninsula and then in Tamaulipas. This season, two systems, Debby and Joan, crossed into the Pacific Ocean. There, Debby was redesignated as Tropical Depression Seventeen-E, and Joan was renamed Tropical Storm Miriam.

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. 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. 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.