Tropical Storm Dolly made landfall in eastern Mexico and triggered flooding due to heavy rains, leaving minor impact.
The forecast team noted that conditions for tropical cyclogenesis appeared "detrimental", with abnormally cold sea surface temperatures, higher than average sea-level pressures, and strong vertical wind shear.
The lack of activity was attributed to an atmospheric circulation that favored dry, sinking air over the Atlantic Ocean and strong wind shear over the Caribbean Sea.
An area of low pressure developed off the Southeast United States by June 28, eventually leading to the formation of a tropical depression by 00:00 UTC on July 1.
An approaching mid-level trough directed the storm north-northeastward as it continued to intensify, and Arthur reached its peak as a Category 2 hurricane with winds of 100 mph (160 km/h) at 00:00 UTC on July 4.
A few hours later, it moved ashore just west of Cape Lookout, North Carolina, becoming the earliest landfalling hurricane on record in the state.
Following landfall, Arthur accelerated northeast across the western Atlantic while encountering an increasingly unfavorable environment, weakening to a tropical storm at 06:00 UTC on July 5 and transitioning into an extratropical cyclone six hours later.
[31] At its height, Arthur knocked out power to 44,000 people in North Carolina, triggering Duke Energy to deploy over 500 personnel to restore electricity.
Observed rainfall totals over a half foot required the issuance of a flash flood emergency for New Bedford, Massachusetts, while several roads were shut down in surrounding locations.
[34] After transitioning into an extratropical cyclone, Arthur knocked out power to more than 290,000 individuals across the Maritimes,[35] with damage to the electrical grid considered the worst since Hurricane Juan in Nova Scotia.
The depression failed to intensify into a tropical storm amid an exceptionally dry and stable environment and instead degenerated into a trough by 18:00 UTC on July 23 while located east of the Lesser Antilles.
Enhanced swells and rip currents associated with the hurricane resulted in three fatalities and dozens of rescues along the East Coast of the United States.
Although located in an unfavorable environment, Cristobal steadily intensified and was upgraded to a Category 1 hurricane at 00:00 UTC on August 26 despite a partially exposed circulation and disorganized cloud pattern.
[50] The precursor of Cristobal and the storm itself dropped heavy precipitation on Puerto Rico, with 13.21 in (336 mm) of rain observed in the municipality of Tibes, bring drought relief to the island.
[56][57] An area of low pressure interacted with an atmospheric Kelvin wave, leading to the formation of a tropical depression in the Bay of Campeche at 18:00 UTC on August 31.
The cyclone abruptly weakened thereafter as it curved northeastward in advance of an upper-level trough, falling below hurricane intensity by 00:00 UTC on September 19 and degenerating into a remnant low eighteen hours later.
[64] Though Edouard remained well away from land throughout its existence, large swells and dangerous rip currents affected much of the East Coast of the United States.
[67] The Bermuda Weather Service noted the hurricane as a "potential threat"; however, Edouard remained several hundred miles away from the islands.
[69] Additionally, a NASA-operated Global Hawk flew into the storm, equipped with two experimental instruments: the Scanning High-resolution Interferometer Sounder (S-HIS) and Cloud Physics Lidar (CPL).
Directed north-northwestward around a mid-level ridge across the central Atlantic, the system became dislocated from a cold-core low, allowing for a subsequent transition into a fully tropical storm by early on October 11.
Fay continued to strengthen in spite of excessively strong wind shear as it accelerated north-northeast, becoming a hurricane as it approached Bermuda the next morning.
Steered west and eventually west-northwest, the cyclone rapidly intensified amid favorable atmospheric dynamics, becoming a minimal hurricane by 12:00 UTC on October 13.
The hurricane underwent an eyewall replacement cycle the next day, but ultimately attained peak winds of 145 mph (235 km/h) and a minimum barometric pressure of 940 mbar (28 inHg) by 12:00 UTC on October 16.
Late that afternoon, the effects of a second eyewall replacement cycle, cooler waters, and increased shear caused the storm to begin a steady weakening trend as it accelerated north-northeast ahead of an approaching trough.
Gonzalo weakened below major hurricane intensity by 00:00 UTC on October 18 and made landfall on Bermuda with winds of 110 mph (175 km/h) six hours later.
[22] The storm complex incorporating Gonzalo's remnants generated heavy rain and wind gusts between 50–70 mph (80–113 km/h) in Ireland and the United Kingdom; trees were downed, transportation was disrupted, and one fatality was reported.
[84][85] On October 19, the remnants of Tropical Storm Trudy emerged over the Bay of Campeche, after losing its low-level circulation over the mountainous terrain of Mexico.
Moving slowly eastward, the system redeveloped a new surface circulation on October 21, becoming a tropical depression on the next day about 175 mi (280 km) west of Campeche, Mexico.
Increasing wind shear and dry air intrusion soon caused the depression to degrade into a remnant low early on October 23 before moving inland over the southwestern Yucatán Peninsula.
Following the development of deep convection the system regenerated into a tropical depression around 00:00 UTC on October 27 roughly 80 mi (130 km) east of the Nicaragua–Honduras border.