In July, Tropical Storm Becky brought minor flooding to Florida and other parts of the Southern United States, leaving one death and about $500,000 (1970 USD) in damage.

Celia became the most intense tropical cyclone of the season on August 3, peaking as a Category 3 hurricane on the Saffir–Simpson scale with maximum sustained winds of 140 mph (220 km/h) and a minimum barometric pressure of 944 mbar (27.88 inHg).

[3] In response to low wind shear and warm sea surface temperatures,[1] the depression rapidly strengthened to a tropical storm early on May 20 and to a hurricane that night.

[3] As Alma crossed the eastern Gulf of Mexico, it retained a well-defined circulation with an eye feature evident on weather radar, but the persistent shear limited the system's intensity.

[1] Tropical Depression Alma made landfall near Cedar Key, Florida, on May 25 and became extratropical two days later over North Carolina.

Becky tracked northward to north-northeastward across the Gulf of Mexico and eventually strengthened to reach peak winds of 65 mph (100 km/h) late on July 20.

Celia then underwent rapid intensification and at 21:00 UTC, the storm peaked as a Category 4 hurricane with sustained winds of 140 mph (220 km/h) and a minimum pressure of 944 mbar (27.88 inHg) as it made landfall near Corpus Christi, Texas.

However, a Hurricane Hunters flight two days later observed a weak system, suggesting the storm weakened back to a tropical depression.

While approaching the Lesser Antilles, the depression turned to the northwest and re-intensified back into a tropical storm, with hurricane-force wind gusts north of the center.

As the storm accelerated northeastward, it intensified into a hurricane, with peak winds of 80 mph (130 km/h), based on the well-defined eye and a report from a nearby ship.

[22] Minor wind damage was reported in Atlantic Beach and Morehead City, primarily limited to some trees, power lines, roof shingles, television antennas, and signs.

Around 06:00 UTC on August 20, Dorothy attained its peak intensity with maximum sustained winds of 70 mph (110 km/h), several hours before striking Martinique.

[3] After passing through the Lesser Antilles, Dorothy moved under an upper-level cold-core trough,[27] which generated stronger wind shear and caused the storm to weaken.

On Martinique, large amounts of precipitation resulted in flooding and mudslides, which in turn, caused bridge collapses and damage to homes.

While approaching the Gulf Coast of Mexico, the cyclone deepened significantly, peaking as a Category 3 hurricane on September 12 with winds of 125 mph (205 km/h) and a minimum pressure of 967 mbar (28.56 inHg).

[3] Felice remained a disorganized storm for its entire duration, plagued by dry air, a lack of deep thunderstorm activity, and an ill-defined center of circulation.

[1] However, early on September 16, the cyclone peaked with maximum sustained winds of 70 mph (110 km/h) and a minimum barometric pressure of 997 mbar (29.44 inHg).

Felice tracked northwestward and brushed southern Louisiana on September 15, before making landfall near Galveston, Texas, later that day.

[36] In advance of the cyclone, officials advised residents in vulnerable communities to evacuate their homes,[37] and temporary storm shelters were established.

Beneficial rains fell over parts of southern Florida,[39] while sections of coastal Louisiana experienced minimal gale-force winds and above-normal tides.

[36] The interaction of a tropical wave and a weakening front spawned an area of disturbed weather northeast of the Leeward Islands on September 18.

Shortly thereafter, the system reached peak winds of 45 mph (75 km/h) as it maintained compact convection and attendant spiral bands into its center.

[21] A tropical wave exited the west coast of Africa September 24, and for several days maintained a general westward track.

It crossed the island into the Atlantic and moved northeastward ahead of an approaching cold front, briefly becoming a tropical storm again on October 10.

[21] The system produced heavy rainfall in the Lesser Antilles, reaching 12 in (300 mm) on Barbados;[42] it left three deaths and moderate damage on the island.

[3][52] The hurricane produced high winds on Bermuda, canceling classes, interrupting transportation, and closing businesses, though damage was minimal.

After turning eastward, the powerful extratropical storm passed south of Iceland on December 4, and north of the United Kingdom a day later.

[21] On August 29, convection increased over the western Caribbean as a tropical wave approached the area, which subsequently moved into the Gulf of Mexico.

An area of low pressure formed amid widespread thunderstorm activity on November 8, but the system fluctuated in organization over later days as it moved slowly offshore Nicaragua.

However, an approaching front moving into the northwestern Caribbean soon imparted shear on the system, causing it to dissipate between Grand Cayman and the Swan Islands early on November 15.