The IPCC report AR5 and it’s report on extreme weather says there is little evidence that extreme weather events can be attributed to human-caused emissions. Weather extremes in the U.S. were worse in the 1930’s and 1950’s than in recent decades. So why is the Prairie Climate Centre of the University of Winnipeg claiming the opposite? They state that there will be a lot more extremes, even though the leading climate authorities say this is not true. Eight of the worst floods in Calgary occurred before 1933, with two of them having larger flows than that of 2013.