I can address that.
John Fyfe and Steve Lambert at the Canadian Centre for Climate Modelling and Analysis in Victoria have looked at that. They found that there is evidence that over the last few decades there has been an actual decrease in the total number of mid-latitude storms, but an increase in the stronger ones. When they analyzed the models and what they say will happen in the future, every single model from every single country done by every single group said that more of the same will happen; that is, while there may be a decrease in the total number of storms at mid-latitudes, those stronger storms actually increase.