1970 WMHB Atlantic hurricane season (Cooper)

The 1970 Atlantic hurricane season was the first season in the most recent negative phase of the Atlantic Multidecadal Oscillation (AMO). However, it was an active season, with 12 named storms, 7 hurricanes, and 2 major hurricanes forming. The season officially began on June 1, 1970, and ended on November 30, 1970. These dates historically describe the period each year when most tropical cyclones form in the Atlantic basin and are adopted by convention. However, tropical cyclogenesis is possible at any time of the year, as shown by the formation of Hurricane Alma on May 17, which became one of only six Atlantic tropical cyclones to become a hurricane in the month of May.

Storm names
The following list of names was used for named storms that formed in the North Atlantic in 1970. The names not retired from this list were used again in the 1974 season. This was the same list used in the 1966 season, with the exception of the name Isabel, which replaced Inez, and was used for the first time this year.