Ryan N. Maue’s 2010 Global Tropical Cyclone Activity excellent website has been updated through September 2 2010. The latest text he has provided (August 31) reads
“August 31 : With the month of August ended, it is time to update the ACE graphics and decide whether the recent increase in global activity, 3 storms in the Western Pacific and 3 storms in the Atlantic is evidence of a return to normalcy. With Danielle and Earl being Cape Verde-type storms which recurve into the middle-latitudes, they last a long time and generate considerable ACE. However, it is just barely enough to keep up with climatology.
August ACE for the Northern Hemisphere was 63 which is much less than the climatological average of 115. The Western Pacific again was much below average. It was indeed the Atlantic that produced two long-lived storms, Danielle and Earl that picked up some of the slack. The global and NH ACE remains at/near 30-year lows.”
As we continue to have enhanced activity in the Atlantic basin, this is a very valuable website to keep up with the increase in the ACE in this basin as well as elsewhere.