The 2013 Atlantic hurricane season was a well below average season for both hurricanes and major hurricanes. It was also the first season since 1968 with no storms of at least Category 2 intensity on the Saffir–Simpson hurricane wind scale. The lack of activity was primarily caused by an unexpected significant weakening of the Atlantic Ocean thermohaline circulation between winter and spring. All major forecasting agencies predicted an above-average season.
About 2013 Atlantic hurricane season in brief
The 2013 Atlantic hurricane season was a well below average season for both hurricanes and major hurricanes. It was also the first season since 1968 with no storms of at least Category 2 intensity on the Saffir–Simpson hurricane wind scale. Throughout the year, only two storms—Humberto and Ingrid—reached hurricane intensity; this was the lowest seasonal total since 1982. The lack of activity was primarily caused by an unexpected significant weakening of the Atlantic Ocean thermohaline circulation between winter and spring. The season’s impact was minimal; although 15 tropical cyclones developed, most were weak or remained at sea. The first tropical cyclone of this hurricane season, Andrea, developed on June 5, while the final cyclone, an unnamed subtropical storm, dissipated on December 7. All major forecasting agencies predicted an above-average season. All reduced their seasonal predictions in early August, but even the revised predictions were too high. The number of tropical storms, hurricanes, and major hurricane within a hurricane season are considered occasionally as well. The average Atlantic hurricaneSeason between 1981 and 2010 contained roughly 12 tropical storms,. six hurricanes, three major hurricanes, and an accumulated cyclone energy index of 66–103 units. The 2013 season was slightly above average for named storms, with 16 named storms and five major hurricanes in the Atlantic. The United Kingdom’s Met Office predicted 14 named storms with a 70% chance that the number of a major hurricane hitting the Gulf and East Coast were well above average.
The U.S. National Oceanic and Atmospheric Administration’s National Hurricane and Climate Prediction Center, Tropical Storm Risk, and Philip J. Klotzbach, William M. Gray and associates at Colorado State University issued their first forecast for the hurricane season on April 10. In its report, the organization called for 15. 2 named storms,. 7. 5 hurricanes, 3. 4 major hurricanes,. and an ACE index of 131; the landfalling ACE index was once again forecast to be higher than normal. On April 10, Colorado State issued its first forecast, calling for a potentially hyperactive season, with 18 named storms. The organization forecast, the number would be between 18 and nine hurricanes, with an ACE Index of between 4 and 14. It also predicted an ACEIndex of 130, with a chance of a potential landfalling major hurricane in the Gulf of Mexico of between 70 and 76% in the next few weeks. The group forecast, in its report on April 5, called for a season with 15.2 namedStorms, 7.7 hurricanes, 4 major hurricanes and anACE index of 165. The report also predicted a landfalling landfalling hurricane of between 10 and 14 in the United States of America of between July and August. In early October, Karen brought showers and gusty winds to the central Gulf Coast of the US. Mexico, where Hurricane Ingrid, Tropical Depression Eight, and tropical storms Barry and Fernand all made landfall, was the hardest hit; Ingrid alone caused at least 32 deaths and USD 1. 5 billion in damage.
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