2013 Hurricane Track Summary
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The 2013 Atlantic hurricane season was the first Atlantic hurricane season since 1994 to feature no major hurricanes, and the first since 1968 to feature no storms of at least Category 2 intensity on the Saffir–Simpson hurricane wind scale. The season officially began on June 1 and ended on November 30, dates that conventionally delimit the period during each year when most tropical cyclones form in the Atlantic Ocean. The first storm of the season, Andrea, developed on June 5, while the final cyclone, an unnamed subtropical storm, dissipated on December 7. Throughout the year, only two storms – Humberto and Ingrid – reached hurricane intensity; this was the lowest seasonal total since 1982.

Although 15 tropical cyclones developed, several were weak or remained at sea, resulting in impact from the season being relatively minimal. Tropical Storm Andrea in early June killed four people after making landfall in Florida and moving up the East Coast of the United States. In early July, Tropical Storm Chantal moved through the Leeward Islands, causing one fatality, but minimal damage overall. Tropical storms Dorian and Erin, and Hurricane Humberto, all brought squally weather but limited impact to the Cape Verde Islands. Particularly hard hit was Mexico, where tropical storms Barry, Fernand, Tropical Depression Eight, and Hurricane Ingrid all made landfall. Ingrid especially brought severe impacts, in conjunction with Hurricane Manuel, with at least 23 deaths and $1.5 billion (2013 USD) in damage. In early October, Karen brought showers and gusty winds to the central Gulf Coast of the United States.

All major forecasting agencies predicted an above-average season. Following less activity than forecast, the agencies reduced their seasonal predictions in early August. Despite the revisions, activity remained far below the forecasts, at thirteen tropical storms, two hurricanes, and no major hurricanes. The lack of activity was primarily caused by an unexpected significant weakening of the Atlantic Ocean thermohaline circulation between winter and spring. This resulted in continuation of the spring weather pattern over the Atlantic Ocean, with strong vertical wind shear, mid-level moisture, and atmospheric stability, which suppressed tropical cyclogenesis.
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