The 1989 Atlantic hurricane season was the annual cycle of tropical cyclone formation over the Atlantic Ocean north of the equator. The season officially began on June 1 and ended on November 30. This is historically the period during which most subtropical or tropical cyclogenesis occurs over the Atlantic Ocean. The first system was a tropical depression that formed on June 15; the final system, Tropical Storm Karen, dissipated on December 4, four days after the season officially ended.

A total of 11 named tropical storms developed during the 1989 season. Seven strengthened into hurricanes, two of which became major hurricanes by reaching Category 3 or higher on the five-level Saffir–Simpson scale. These figures were close to average for an Atlantic hurricane season at the time. The season also produced four tropical depressions that failed to reach tropical storm strength.

Several systems affected land, including Hurricane Hugo, which carved a path of destruction and claimed dozens of lives as it swept through several northeastern Caribbean territories and much of the Eastern United States in September. Hugo made five landfalls, all of which were as a major hurricane. It was the costliest hurricane in United States history at the time, wreaking at least US$9.5 billion in damage between the country's territories and its mainland. Three storms—Allison, Chantal, and Jerry—made landfall in Texas, the first of which inflicted devastating floods by way of heavy rainfall from its slow movement. Damage was estimated at roughly US$560 million, and 11 people were killed. Hurricane Dean struck Newfoundland as a tropical storm near the end of its tenure as a tropical cyclone, and rip currents caused by Hurricane Gabrielle resulted in several fatalities even though the hurricane itself remained out to sea.

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 (NHC) 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. __TOC__

Timeline of events

June June 1 The 1989 Atlantic hurricane season officially begins.

June 15 18:00 UTC (1:00 p.m. CDT) at Tropical Depression One develops from a frontal boundary while located over the Bay of Campeche. It is already at its peak intensity, with maximum sustained winds of 30 mph (45 km/h) and an unknown central pressure.

June 17 06:00 UTC (1:00 a.m. CDT) at Tropical Depression One is last noted as a tropical cyclone while located about 110 mi (175 km) south-southeast of where it formed, dissipating shortly thereafter.

June 24 18:00 UTC (1:00 p.m. CDT) at Tropical Depression Two develops from an interaction between a tropical wave and the remnants of Pacific Hurricane Cosme while located about 115 mi (185 km) northeast of Brownsville, Texas.

June 26

00:00 UTC (7:00 p.m. CDT, June 25) at Tropical Depression Two strengthens into Tropical Storm Allison while located about 165 mi (270 km) northeast of Brownsville. 13:00 UTC (8:00 a.m. CDT) at Tropical Storm Allison makes landfall in Texas on the northeastern end of Matagorda Bay with maximum sustained winds of 45 mph (75 km/h) and a central pressure of .

June 27 00:00 UTC (7:00 p.m. CDT, June 26) at Tropical Storm Allison attains its peak intensity, with maximum sustained winds of 50 mph (85 km/h) and a minimum central pressure of , while located over land about 25 mi (35 km) west of Houston, Texas. 12:00 UTC (7:00 a.m. CDT) at Tropical Storm Allison weakens into a tropical depression while located over land about 65 mi (100 km) north-northeast of Houston.

June 28 00:00 UTC (7:00 p.m. CDT, June 27) at Tropical Depression Allison transitions into an extratropical cyclone while located over land about 115 mi (185 km) northeast of Houston, and later dissipates.

July July 9 18:00 UTC (2:00 p.m. AST) at Tropical Depression Three develops from a tropical wave while located roughly midway between Africa and the Lesser Antilles.

July 11 00:00 UTC (8:00 p.m. AST, July 10) at Tropical Depression Two strengthens into Tropical Storm Barry while located about 1,100 mi (1,770 km) east of Saint Thomas, U.S. Virgin Islands.

July 12

00:00 UTC (8:00 p.m. AST, July 11) at Tropical Storm Barry attains its peak intensity, with maximum sustained winds of 50 mph (85 km/h) and a minimum central pressure of , while located about 795 mi (1,280 km) east-northeast of Saint Thomas.

July 13 18:00 UTC (2:00 p.m. AST) at Tropical Storm Barry weakens into a tropical depression while located about 610 mi (980 km) northeast of Saint Thomas.

July 14 00:00 UTC (8:00 p.m. AST, July 13) at Tropical Depression Barry is last noted as a tropical cyclone while located about 560 mi (900 km) northeast of Saint Thomas, dissipating shortly thereafter.

July 30 12:00 UTC (7:00 a.m. CDT) at Tropical Depression Four develops from a low-pressure area, which itself had originated as an Intertropical Convergence Zone (ITCZ) disturbance, while located over the southern Gulf of Mexico about 90 mi (150 km) off the north coast of the Yucatán Peninsula.

July 31 06:00 UTC (1:00 a.m. CDT) at Tropical Depression Four strengthens into Tropical Storm Chantal while located about 355 mi (575 km) southeast of Galveston, Texas. 06:00 UTC (2:00 a.m. AST) at The fifth tropical depression of the season develops from a tropical wave while located roughly midway between Cape Verde and the Lesser Antilles.

August August 1

00:00 UTC (7:00 p.m. CDT, July 31) at Tropical Storm Chantal strengthens into a Category 1 hurricane on the Saffir–Simpson scale while located about 155 mi (250 km) southeast of Galveston. 06:00 UTC (2:00 a.m. AST) at The fifth tropical depression of the season strengthens into Tropical Storm Dean while located about 800 mi (1,290 km) east of Dominica. 10:00 UTC (5:00 a.m. CDT) at Hurricane Chantal attains its peak intensity, with maximum sustained winds of 80 mph (130 km/h) and a minimum central pressure of , while located about 45 mi (75 km) east of Galveston. 13:00 UTC (8:00 a.m. CDT) at Hurricane Chantal makes landfall at High Island, Texas, with maximum sustained winds of 80 mph (130 km/h) and a central pressure of . 18:00 UTC (1:00 p.m. CDT) at Hurricane Chantal weakens into a tropical storm while located over land about 35 mi (55 km) north-northeast of Houston.

August 2 06:00 UTC (1:00 a.m. CDT) at Tropical Storm Chantal weakens into a tropical depression while located over land just east of Waco, Texas. 12:00 UTC (8:00 a.m. AST) at Tropical Storm Dean strengthens into a Category 1 hurricane while located about 240 mi (390 km) east of Antigua.

August 3 00:00 UTC (7:00 p.m. CDT, August 2) at Tropical Depression Chantal is last noted as a tropical cyclone while located over southwestern Oklahoma, dissipating shortly thereafter.

August 6 18:00 UTC (2:00 p.m. EDT) at Hurricane Dean strengthens to Category 2 intensity while located about 25 mi (35 km) west-northwest of Bermuda.

August 7

00:00 UTC (8:00 p.m. AST, August 6) at Hurricane Dean attains its peak intensity, with maximum sustained winds of 105 mph (165 km/h) and a minimum central pressure of , while located about 115 mi (185 km) north of Bermuda. 18:00 UTC (2:00 p.m. AST) at Hurricane Dean weakens to Category 1 intensity while located about 495 mi (795 km) north of Bermuda.

August 8 12:00 UTC (8:00 a.m. AST) at Hurricane Dean weakens into a tropical storm while located about 30 mi (45 km) south-southwest of Saint Pierre and Miquelon. 13:00 UTC (9:00 a.m. AST) at Tropical Storm Dean makes landfall on the coast of southern Newfoundland, or just east of Saint Pierre and Miquelon, with maximum sustained winds of 65 mph (100 km/h) and a central pressure of , emerging back over the Atlantic Ocean shortly thereafter. 18:00 UTC (2:00 p.m. AST) at Tropical Depression Six develops from a tropical wave while located east of Cape Verde.

August 9 00:00 UTC (8:00 p.m. AST, August 8) at Tropical Storm Dean transitions into an extratropical cyclone while located about 365 mi (585 km) northeast of Cape Race, Newfoundland, and later dissipates.

August 16

12:00 UTC (8:00 a.m. AST) at Tropical Depression Six attains its peak intensity, with maximum sustained winds of 35 mph (55 km/h) and an unknown central pressure, while located about 720 mi (1,160 km) east-northeast of Barbados.

August 17 12:00 UTC (8:00 a.m. AST) at Tropical Depression Six is last noted as a tropical cyclone while located about 430 mi (695 km) northeast of Barbados, dissipating shortly thereafter.

August 18 00:00 UTC (8:00 p.m. AST, August 17) at The seventh tropical depression of the season develops from a tropical wave while located just southeast of Cape Verde.

August 19 18:00 UTC (2:00 p.m. AST) at The seventh tropical depression of the season strengthens into Tropical Storm Erin while located about 505 mi (815 km) west of Santo Antão, Cape Verde.

August 22 12:00 UTC (8:00 a.m. AST) at Tropical Storm Erin strengthens into a Category 1 hurricane while located about 1,055 mi (1,695 km) southwest of Flores Island, Azores.

August 24

00:00 UTC (8:00 p.m. AST, August 23) at Hurricane Erin strengthens to Category 2 intensity while located about 930 mi (1,500 km) west-southwest of Flores Island.

August 25 00:00 UTC (8:00 p.m. AST, August 24) at Hurricane Erin attains its peak intensity, with maximum sustained winds of 105 mph (165 km/h) and a minimum central pressure of , while located about 650 mi (1,045 km) west-southwest of Flores Island.

August 26 00:00 UTC (8:00 p.m. AST, August 25) at Hurricane Erin weakens to Category 1 intensity while located about 370 mi (595 km) west-northwest of Flores Island. 00:00 UTC (8:00 p.m. AST, August 25) at The eighth tropical depression of the season develops from a low-pressure area associated with a tropical wave while located about 125 mi (205 km) east of Sal, Cape Verde. 18:00 UTC (2:00 p.m. AST) at The eighth tropical depression of the season strengthens into Tropical Storm Felix while located about 35 mi (55 km) north of Sal.

August 27 00:00 UTC (8:00 p.m. AST, August 26) at Hurricane Erin weakens into a tropical storm while located about 865 mi (1,390 km) north of Flores Island, transitioning into an extratropical cyclone shortly thereafter. 06:00 UTC (2:00 a.m. AST) at Tropical Depression Nine develops from a tropical wave while located about 765 mi (1,230 km) east of Barbados. 12:00 UTC (8:00 a.m. AST) at Tropical Depression Nine attains its peak intensity, with maximum sustained winds of 30 mph (45 km/h) and an unknown central pressure, while located about 700 mi (1,130 km) east of Barbados.

August 28 12:00 UTC (8:00 a.m. AST) at Tropical Depression Nine is last noted as a tropical cyclone while located about 415 mi (665 km) east of Barbados, dissipating shortly thereafter.

August 29

18:00 UTC (2:00 p.m. AST) at Tropical Storm Felix weakens into a tropical depression while located about 375 mi (600 km) north-northwest of Santo Antão.

August 30 12:00 UTC (8:00 a.m. AST) at Tropical Depression Ten develops from a tropical wave while located about 290 mi (465 km) south-southeast of Maio, Cape Verde.

August 31