The June through November dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin.

[1] The final storm of the year, Tropical Depression Fourteen, merged with a weak extratropical low on November 4.

Hurricane Emily was the costliest storm of the season, causing $80.3 million in damage (1987 USD) as it ravaged the Dominican Republic and Bermuda.

[6][7] The season's activity was reflected with a cumulative accumulated cyclone energy (ACE) rating of 34,[8] which is classified as "below normal".

It turned to the southeast and re-emerged into the Gulf of Mexico on August 15, before striking near St. Marks, Florida, on the next day.

[17] The slow-moving system produced heavy rainfall along the Gulf Coast, particularly in southern Mississippi and Alabama, with just over 21 in (530 mm) of precipitation recorded in the former.

[18] In Mississippi, the Biloxi and Tchoutacabouffa rivers crested at major flood stage, forcing 357 people to evacuate.

[4] A low pressure system on the tail end of a stationary cold front organized into a subtropical depression on August 8 near the South Carolina coast, and drifted southward.

It executed an anticyclonic loop to the northeast, and was estimated to have attained tropical storm status on August 11, based on reports from hurricane hunters.

Small cells in the ridge of high pressure caused Arlene to take an unusual track to the east, with two southward jogs in its path.

However, after high pressures to its east forced the storm northward, more favorable conditions allowed Arlene to intensify into a hurricane on August 22.

After becoming a hurricane, Arlene accelerated to the northeast into the cold waters of the north Atlantic Ocean, and on August 23 it became extratropical about halfway between Newfoundland and Ireland.

The extratropical remnants turned to the southeast and later to the east, making landfall on the Iberian Peninsula before dissipating on August 28 over Spain.

[21] A blind sailor on a trip across the Atlantic was unable to make it to a harbor in Bermuda due to the hurricane, and rode out the storm in the open sea.

[25] Tropical Depression Four peaked with sustained winds of 35 mph (55 km/h) and dissipated on August 15 about 25 mi (40 km) northeast of Anegada in the British Virgin Islands.

Later the same day, the ship S.S. Columbus Canterrury reported 40 mph (60 km/h) winds and a pressure of 1,004 mbar (29.6 inHg), and the depression became Tropical Storm Bret.

[26] A ridge of high pressure in the eastern Atlantic Ocean, north of Bret, began to weaken and drift to the east on August 20.

The depression was then located 950 miles (1,530 km) west of Sao Taigo in Cape Verde, stirring up 12-foot (4 m) seas.

[11] An upper-level cyclone in the northern Gulf of Mexico started tropical cyclogenesis offshore the southeast United States.

Initially poorly organized,[37] the depression moved generally northward without strengthening, and quickly made landfall along the coast of South Carolina.

It maintained its identity as it tracked through North Carolina and the Mid-Atlantic States, and on September 10 the depression merged with a frontal wave over New England.

It tracked westward, passing to the south of the Cape Verde islands, and based on satellite imagery was estimated to have reached tropical storm status on September 10.

Tropical Storm Dennis continued to gradually intensify, and on September 11 attained peak winds of 50 mph (80 km/h) and a minimum pressure of 1,000 mbar (30 inHg).

The depression turned abruptly northwestward through a weakness in the subtropical ridge, suggesting a new low-pressure area developed.

Subsequent to crossing western Cuba, Floyd accelerated to the northeast, and attained hurricane status late on October 12.

It moved northwestward, and entered a high-shear environment due to an upper-level low situated toward the end of a high pressure system.

A burst of convection organized over the depression, and brought strong wind gusts to the Florida Keys as it passed through the area on November 2.

It includes their name, duration, peak classification and intensities, areas affected, damage, and death totals.