Paul Homewood: "While Michael Mann makes a big play about the five Cat 5s since 2016, he forgets to mention that there were none at all between 2008 and 2015.It is not uncommon to have two such storms in the same year, as we did two years ago with Irma and Maria. The same thing happened in successive years in 1932 and 1933. And there were six Cat 5s altogether in the 1930s, compared to five since 2010...[But] How many Cat 5s were missed in the pre-satellite period?"
Leading hurricane researcher Chris Landsea, of NOAA’s National Hurricane Center, found in his 2012 study in the journal of the American Meteorological Society: "The present study focuses on the 10 most recent Category 5 hurricanes recorded in the Atlantic, from Hurricane Andrew (1992) through Hurricane Felix (2007). These 10 hurricanes are placed into the context of the technology available in the period of 1944–53, the first decade of aircraft reconnaissance. A methodology is created to determine how many of these 10 recent Category 5 hurricanes likely would have been recorded as Category 5 if they had occurred during this period using only the observations that likely would have been available with existing technology and observational networks..."
“It is found that likely only 2 of these 10—both Category 5 landfalling hurricanes—would have been recorded as Category 5 hurricanes if they had occurred during the late-1940s period.”
Note the starting point, 1944. Also note that the majority of “slow moving hurricanes” are during the satellite era, when hurricane tracking improved by at least an order of magnitude...Many of the slowest moving storms were a long time ago
Spencer: "What they claim is a record (which appears so) is that we have now had a stretch of 4 consecutive years with at least one Cat5 hurricane. I claim that is a contrived statistic...The 1930s also had a stretch of 4 years with 5 Category 5 Atlantic hurricanes...Which is more significant in a “climate change” context: that in 1933-34 there were two Cat5 storms (both in 1933), or in 2018-2019 there were also two Cat5 storms, but one in each year? Because that what this boils down to."