Two hurricanes, one of them a category 4, four tropical storms and at least six tropical waves are currently active in the northern tropics fulfilling our earlier assessment that the ‘tropics are hot’ and things are happening quite fast in the tropics. It would appear the 2010 Atlantic hurricane season has suddenly entered a whole higher level of activity after a slow start. Based on the systems currently active and what already appears in the horizon looking east from the Atlantic over equatorial Africa and the Indian ocean, it appears September is gearing up for a new level of tropical cyclone activity.
A wider view shows additional tropical activity extending into the Indian Ocean as far back as Indonesia and over into the western Pacific where Typhoon KOMPASU is a category 2 tropical cyclone over the southwestern Ryukyu Islands of Japan, and tropical storms LIONROCK and NAMTHEUN are respectively south of the Ryukyu islands near Taiwan and southwest of Taiwan moving for landfall in mainland China. The composite Global Mosaic below shows a good part of such tropical cyclone activity over the Atlantic, Equatorial Africa and the Indian Ocean.
The ‘belt’ of tropical weather circling the Earth just north of the equator appears to be firmly in place and fueled by enough activity to last for several days into September. It is interesting to note that two of the currently active systems, Danielle and Earl have both reached category 4 strength, Hurricane Earl went from category 1 to 4 in the span of one day, and Tropical Storm Fiona went from a tropical wave to tropical storm strength in one continuous spur of activity earlier today 30 August 2010. It is clear that conditions overland in tropical equatorial Africa and in the coupled ocean-atmosphere Atlantic environment continue to be favorable for tropical cyclone development and rapid strengthening of new storms.