Flooding from Floyd in North Carolina followed Hurricane Dennis, a slow and erratic–moving storm that dropped heavy rainfall in the eastern portion of the state.

Tropical Depression Eleven in October contributed to extreme flooding in Mexico, which left 636 people dead and caused $491.3 million in damage, though impact could not be distinguished from the storm itself.

The three main factors for this above average season forecast cited included a continuation of abnormally warm sea surface temperatures, the probability that La Niña conditions would remain, and that the quasi-biennial oscillation (QBO) winds would be in a westerly phase.

After the circulation reformed within the area of stronger convection, the NHC estimated that Tropical Depression One developed at 18:00 UTC on June 11 about 535 mi (861 km) southeast of Bermuda.

The nascent depression drifted northward for 24 hours, and during this time, it strengthened and was upgraded to Tropical Storm Arlene at 12:00 UTC on June 12, based on Dvorak satellite classifications.

The storm intensified further to its peak intensity at 00:00 UTC on June 13, with estimated maximum sustained winds of 60 mph (97 km/h) and a minimum barometric pressure of 1,006 mbar (29.7 inHg), based on ship reports and satellite.

Bret strengthened significantly over the next 36 hours, peaking as a 145 mph (233 km/h) Category 4 hurricane with a minimum barometric pressure of 944 mbar (27.9 inHg) on August 22.

By the following day, steering currents collapsed and the storm interacted with a cold front, causing Dennis to move erratically offshore North Carolina.

At 1800 UTC on August 24, Emily attained its peak intensity with maximum sustained winds of 50 mph (80 km/h) and a minimum barometric pressure of 1,004 mbar (29.6 inHg).

Six hours later, Floyd made landfall near Alice Town on Eleuthera with winds of 120 mph (190 km/h), around the time that the cyclone began moving north-northwestward.

[60] In the Bahamas, a combination of strong winds and storm surge destroyed numerous restaurants, hotels, shops, and homes,[61] and left tens of thousands without water, electricity, and food.

[66] In New York City, Floyd dropped 5.02 in (128 mm) of rainfall at the Central Park observatory, setting a daily record for precipitation on September 16.

Due to the development of a low-level circulation and convective banding, the wave became a tropical depression at 12:00 UTC on September 11 to the south of the Cape Verde islands.

[68] After increases in intensity, banding features, and outflow improvement,[69] the depression was upgraded to Tropical Storm Gert on September 12 while moving west-northwestward to the south of a subtropical ridge.

After reaching Category 4 status that day, Gert strengthened further, peaking with maximum sustained winds of 150 mph (240 km/h) and a minimum barometric pressure of 930 mbar (27 inHg) on September 16.

[68] An eyewall replacement cyclone, as well as increasing wind shear and an upper-level trough restricting outflow later on,[72][73] Gert weakened to a low-end Category 3 on September 18.

[68] By 12:00 UTC on September 23, convection diminished enough that the storm transitioned into an extratropical cyclone while situated about 55 mi (89 km) southeast of Cape Race, Newfoundland.

[78] Although Gert's center did not make landfall, it passed a short distance east of the island,[68] producing hurricane-force winds that left 11,000 people without power.

[83] Heavy precipitation was reported in Atlantic Canada, with 11.89 in (302 mm) of rain falling in Oxford, Nova Scotia, making Harvey the wettest tropical cyclone or remnants on record in that country.

[88][89] Flooding caused thousands of landslides and 39 rivers to overflow, leading to the destruction of bridges, houses,[90] widespread crop fields,[91] schools,[92] and electrical networks.

It slowly began to organize during the next several days and by early on October 6, developed into Tropical Depression Twelve while located about 1,075 mi (1,730 km) east of Martinique.

[14] Due to an anticyclone, conditions appeared favorable for significant strengthening, with the National Hurricane Center predicting the depression to be at least a strong tropical storm by October 9.

When Irene interacted with a trough from the west, while over the warm Gulf Stream waters, the hurricane rapidly intensified and attained its peak intensity with maximum sustained winds 110 mph (180 km/h) and a minimum barometric pressure of 958 mbar (28.3 inHg) on October 18.

[99] Flooding resulted from the heavy rains, damaging more than 27,000 homes and causing significant effects to banana plantations and sugar cane fields.

Later on October 21, Jose began moving through the Lesser Antilles as a Category 1 and fell to tropical storm intensity before reentering the Atlantic later that day.

After twelve hours as a hurricane, colder sea surface temperatures weakened Jose to a tropical storm on October 25, shortly before it became extratropical.

[106] Nearly 15 in (380 mm) of rain and winds up to 100 mph (160 km/h) in Anguilla left roads impassable and power outages, and damaged houses, crops, and shipping facilities.

[108][109] Strong winds and heavy rainfall in Puerto Rico and the United States Virgin Islands caused extensive power outages and minor damage, estimated at $40,000.

[110] A broad area of low pressure associated with remnants of a cold front developed into Tropical Depression Fifteen in the southwestern Caribbean Sea on October 28.

The depression began to move in an unusual eastward track across the Caribbean Sea along the southern periphery of a trough and strengthened into Tropical Storm Lenny on the following day.