According to NOAA's National Hurricane Center, approximately 69 percent of the tropical cyclones occur in the Northern Hemisphere, while only 31 percent can be found in the Southern Hemisphere. Approximately 12 percent occur in the Atlantic Ocean, 57 percent occur in the Pacific and the remaining 31 percent occur in the Indian Ocean.
In June 2003 we started providing global near-real time estimates of tropical cyclone heat potential in the seven basins during all year.