>飓风形成在热带水域(8至20度>纬度)在高湿度地区,微风,温暖的海洋表面温度>[通常26.5摄氏度(80华氏度)或>更大)。这些条件通常在夏季和秋季>早期盛行热带的北大西洋和北太平洋,>,出于这个原因,“季节”飓风在北半球>从6月到11月。> >来源:[美国][1]!(全球地图飓风形成的时间基于温暖的海洋表面温度)[2]* * *标题:* *飓风形成的全球地图基于温暖的海洋表面温度的时间。* ![马赛克的热带风暴形成的世界在1985年和2005年之间。我们可以看到大多数发生在太平洋盆地。][3]* * *标题:* *马赛克的热带风暴形成的世界在1985年和2005年之间。我们可以看到大多数发生在太平洋盆地。*至于强风暴,逻辑的答案是,风暴的频率在给定期间直接关系到暴风雨的可能性将会有更多的能量。![图表说明全球热带风暴的发生频率(蓝色区域)和风暴飓风/台风强度(粉红色区域)的发生。][4]* * *标题:* *图表说明全球热带风暴的发生频率(蓝色区域)和风暴的飓风/台风强度(粉色区域)的发生。* ![大西洋飓风和热带风暴的频率图月与9月峰值和97%之间的6月1日至11月30日发生的活动。 ][5] ***CAPTION:** Frequency graph of Atlantic hurricanes and tropical storms by month with peak in September and 97% between of all activity taking place between June 1 to November 30.* ---------- Is the hurricane season getting longer per year? ---------- Yes, it is getting longer according to [research based][6] on the first and last hurricanes of the year - (which I found as a result of [this answer][7]) - though my analysis that this research just reflects that [we see more hurricanes now as a result of satellite imagery](https://en.wikipedia.org/wiki/Atlantic_hurricane_season#Concept), not as a result of there being more storms. ![Time series of the first and last tropical storm formation events each year in the Atlantic][8] ***CAPTION:** Time series of the first and last tropical storm formation events each year in the Atlantic; red-lines (non-aircraft, non-satellite records); blue-lines (aircraft-based records included); green (saterllite based).* [1]: http://earthobservatory.nasa.gov/Features/Hurricanes/ [2]: http://i.stack.imgur.com/sFcZZ.jpg [3]: http://i.stack.imgur.com/I1cT2.jpg [4]: http://i.stack.imgur.com/nXIYM.jpg [5]: http://i.stack.imgur.com/vrewH.jpg [6]: http://www.ssec.wisc.edu/~kossin/articles/2008GL036012.pdf [7]: //www.hoelymoley.com/a/818/284 [8]: http://i.stack.imgur.com/cnga3.jpg