The 2013 Atlantic Basin hurricane season is over so here is a summary of what happened.
The 13 named storms is near the very long-term average of 11 but slightly below the 15 since the current active cycle of the Atlantic Multi-decadal Oscillation (AMO) began in 1995.
The two hurricanes is the lowest number since 1982.
The last time we saw no major hurricanes was in 1994.
I see two main reasons for the mild season. First, frequent intrusions of dry air from the continents, particularly Africa, impeded development. Second, potential storms faced significant wind shear aloft many times during the season and this disrupted storm structure and circulation.
I will continue to monitor the Atlantic Basin during the off-season and I will issue special blogs in the event that something interesting shows up.