The first five months of the 2009 Atlantic Hurricane Season have produced well below average tropical cyclone activity. November has had some memorable events, including last year’s Hurricane Paloma, a Category 4 hurricane that struck Cuba. But normally, November doesn’t produce much activity. During the satellite era starting in 1966, the Atlantic has averaged 0.6 tropical storms and 0.4 hurricanes during the month of November.
The graphic above shows the formation points of 62 tropical storms during the month of November from the National Hurricane Center’s historical data set extending from 1851 to 2008. Note that the developments are somewhat more concentrated over the western Caribbean.
Only time will tell whether the disturbance currently over the southwestern Caribbean Sea develops or not. Given its structure in satellite imagery, it certainly bears watching.