Los datos que analiza hoy el Dr. Jeff Masters son a tener en consideración...

"2008 sets early tornado season records
The year 2008 smashed the record for most January and February tornadoes, with 368. The previous record was set in 1999, with 243 January/February tornadoes. Reliable records extend back to 1950. The 232 tornadoes reported in February of 2008 was a record for the month of February. Second place goes to 1971, with a relatively paltry 90 tornadoes. Each of the past three years has seen an unusually early start to tornado season (Figure 1). One would expect to see a shift in tornado activity earlier in the year in a warming climate, along with an earlier than usual drop off in activity in late spring. We can see that in both 2005 and 2006 that tornado activity dropped off much earlier than usual, and it will be interesting to see if 2008 follows a similar pattern. Note that there is a very high natural variability in tornado numbers, and the record for fewest ever January and February tornadoes was set just five years ago in 2002, when only four twisters occurred. It will be at least ten more years before we can say with any confidence that a warming climate is leading to an earlier peak in tornado season."

http://www.wunderground.com/blog/JeffMasters/comment.html?entrynum=913&tstamp=200803

La traducción se puede resumir en que:

Enero-Febrero de 2008 establece un nuevo record en número de tornados, con 368. El record anterior estaba en 243 para el enero-febrero de 1999. Sólo en febrero de este año se reportaron 232 tornados. En el resto del párrafo se analiza una posible relación entre el número de tornados y el fenómeno del Calentamiento Global, llegándose a la conclusión de que tal relación no puede establecerse, al menos aún.