As the middle of July approaches, Northern Hemisphere TC activity begins to pick up with the WPAC, EPAC, and NATL basins often seeing plenty of strong cyclones.
In terms of ACE, the NH total to date has varied considerably during the past 30-years. The figure shows the calendar year ACE to date for the past 30-years for the Northern Hemisphere as a whole. July 13, 2009.
Global Tropical Cyclone Energy nearing 50-year lows
Figure: Using a longer-database of hurricane tracks for the globe, the recent downturn in global TC energy is nearing record low levels of inactivity - the lowest in 50-years.
Global Tropical Cyclone ACE valid July 20, 2009 00Z
|BASIN||2009 Current||YEARLY||CLIMO |
Thru June 30
Thru July 31
|S Hemisphere||107||229||Out of||Season||---|
Credit of research goes to Ryan N. Maue Florida State University, COAPS, Tallahassee, FL