The 2013 hurricane season is the least active Atlantic season in 30 years, but climatology suggests there is at least one storm left.
As of Oct. 11, this year’s unusually docile hurricane season has only had 11 named storms. According to the Weather Channel, this year is in a neutral state, experiencing neither El Nino nor La Nina. The 1982 and 1983 seasons had equal or less activity than the current season.
In addition to counting storms, the Accumulated Cyclone Energy (ACE) index is used to determine the season’s activity. To figure the ACE index, each hurricane or tropical storm’s wind speed through its life cycle is added together. Weak, short-lived tropical storms have a low ACE index and strong, long-lived hurricanes have a high ACE index. Thus far in 2013, the ACE index is 28, one of the lowest on record.
Humberto and Ingrid were the only two storms this season to strengthen to hurricanes.
This season still has potential for a late season hurricane. Previous late season hurricanes—in 1998 (Mitch), 2005 (Wilma) and 2012 (Sandy)–were destructive.