http://www.reuters.com/article/2012/03/05/us-usa-weather-storms-research-idUSTRE8241W620120305?feedType=RSS&feedName=scienceNews&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+reuters%2FscienceNews+%28News+%2F+US+%2F+Science%29&utm_content=Goo

According to some climate scientists, such earlier-than-normal outbreaks of tornadoes, which typically peak in the spring, will become the norm as the planet warms.

Whether climate change will also affect the frequency or severity of tornadoes, however, remains very much an open question, and one that has received surprisingly little study.