More confidence in the weakening of El Niño (and thus lower vertical wind shear) and the continuation of anomalously warm sea surface temperatures across the Atlantic Ocean were cited.

This was aided by a strongly negative North Atlantic Oscillation that contributed to weaker trade winds and thus anomalous warming of ocean temperatures in the months leading up to the hurricane season.

An area of low pressure developed in association with the system over the northwestern Caribbean on June 24 and further organized into a tropical depression by 18:00 UTC the following day, supported by data from a reconnaissance aircraft.

[43] Near the track of Alex in northern Mexico, rainfall reached as high as 35.04 in (890 mm) in Monterrey,[44] 13-foot (4.0 m) waves affected the coastline,[45] hundreds of thousands of citizens lost power,[46] and widespread infrastructure was damaged or destroyed.

[47] Although the hurricane did not directly move ashore the coastline of the United States, its spiral bands produced tropical storm-force sustained winds across the southern reaches of Texas, peaking at 51 mph (82 km/h) in Port Isabel.

Once north of the Greater Antilles, convective growth and the development of a well-defined surface low led to the formation of a tropical depression just south of Acklins Island by 06:00 UTC on July 22.

[62] The precursor disturbance to Bonnie produced rainfall up to 4 in (100 mm) in the Dominican Republic, isolating towns due to bridge collapses and prompting the evacuation of thousands of residents.

Minimal tropical storm-force winds affected Virginia Key, where a storm surge of 0.92 ft (0.28 m) was also reported, and rainfall up to 3.25 in (83 mm) across Miami-Dade County caused urban flooding.

An abnormally strong ridge to the storm's north steered Colin to the west-northwest; reaching a forward speed up to 30 mph (50 km/h), the system was unable to maintain a closed circulation and instead degenerated into a trough by 18:00 UTC that day.

Steered by a ridge to its north, the depression steadily organized as it moved west-northwest, intensifying into Tropical Storm Danielle by 06:00 UTC on August 22 and attaining hurricane intensity the following day.

Early on August 26, however, a more conducive environment led to rapid intensification, and by 18:00 UTC the next day, the storm attained its peak intensity as a Category 4 hurricane with winds of 130 mph (210 km/h).

It weakened to a tropical storm by 00:00 UTC on September 4, and although the system briefly re-attained hurricane intensity as it moved ashore near Liverpool, Nova Scotia, Earl transitioned into an extratropical cyclone twelve hours later.

Directed by an expansive mid-level ridge to its north, the cyclone moved west-northwest for several days, attaining peak winds of 65 mph (105 km/h) by 18:00 UTC on September 1 as it passed close to the northern Leeward Islands.

Fiona's position between the mid-level ridge and the large circulation of Hurricane Earl off The Carolinas turned the storm northwest and then north as it encountered increasingly strong wind shear and began to weaken.

The system nearly regenerated into a tropical cyclone the following day as shallow convection wrapped into the center, but the increased organization was transient and it ultimately remained a remnant low until dissipating southeast on the Dominican Republic on September 8.

[115] As a reminder of limited hurricane intensity forecasting skill,[116] the system began a period of rapid intensification thereafter, attaining peak winds of 140 mph (225 km/h) by 12:00 UTC on September 15.

The depression intensified into Tropical Storm Karl six hours later and continued to strengthen until moving ashore near Rio Huach, Mexico, with winds of 65 mph (105 km/h) at 12:45 UTC on September 15.

Increasing shear and dry air entrainment caused Karl to weaken slightly, but it retained winds of 115 mph (185 km/h) while making landfall just north of Veracruz, Mexico by 16:45 UTC on September 17.

[134] The remnants of Matthew combined with a broad area of low pressure over the northwestern Caribbean to form Tropical Storm Nicole by 12:00 UTC on September 28, about 75 mi (120 km) south of the Isle of Youth, Cuba.

Affected by strong westerly shear, Nicole never inherited a traditional appearance on satellite imagery; instead, it was characterized by an ill-defined circulation west of most convection, with the strongest winds well displaced from the center.

The cyclone attained peak winds of 45 mph (70 km/h) shortly after formation, but its center of circulation became increasingly diffuse as Nicole tracked toward the Cuba coastline, leading to degeneration into a remnant low by 15:00 UTC on September 29.

[143] A tropical wave departed the western coast of Africa on September 26, becoming entangled with an upper-level trough to form a subtropical depression by 06:00 UTC on October 6, about 265 mi (425 km) north-northwest of San Juan, Puerto Rico.

An abrupt increase in wind shear caused Otto to weaken as it accelerated northeast; it fell to tropical storm intensity by 00:00 UTC on October 10 and transitioned into an extratropical cyclone six hours later while positioned about 1,035 mi (1,666 km) east-northeast of Bermuda.

[148] Across the British Virgin Islands, the worst flooding in the nation's history—with precipitation amounts up to 24.98 in (634 mm)—overturned cars, damaged drainage pipes and utility lines, and left residents without water.

The nascent cyclone intensified into Tropical Storm Paula six hours later, briefly moving ashore the northeastern tip of Honduras early on October 11 before re-emerging into the northwestern Caribbean.

[159] An area of disturbed weather within a persistent, broad trough across the southwestern Caribbean organized into the nineteenth tropical depression of the season by 06:00 UTC on October 20 about 195 mi (315 km) north of Cabo Gracias a Dios.

The depression was slow to organize at first, affected by dry air and moderate shear from a trough over the Southeast United States and western Atlantic, but eventually strengthened into Tropical Storm Richard by 12:00 UTC on October 21 as it curved south and then west.

The Causeway, a low-lying bridge that connects St. David's Island to the mainland, was scheduled to shut down at 7:00 p.m. local time on October 29; several football cancellations were made as a result.

The cyclone turned northwest after formation while continuing to intensify, moving over Barbados by 09:00 UTC on October 30 with winds of 70 mph (115 km/h); as such, Tomas became the latest storm in a calendar year to strike the Windward Islands.

After moving into the Caribbean, a sharp increase in wind shear and dry air entrainment caused Tomas to dramatically weaken, and the storm fell to a tropical depression by 00:00 UTC on November 3.