[There has been no overall increase in the number of tropical storms over the past three decades, but] Category 4 and 5 hurricanes are making up a larger share of the total number of hurricanes, ... made up about 20 percent of all hurricanes in the 1970s, but over the last decade they account for about 35 percent of these storms.  -   Judith Curry     Quotes
[There has been no overall increase in the number of tropical storms over the past three decades, but] Category 4 and 5 hurricanes are making up a larger share of the total number of hurricanes, ... made up about 20 percent of all hurricanes in the 1970s, but over the last decade they account for about 35 percent of these storms. Judith Curry