Since the Civil War, there have only been four times when two consecutive years produced no hurricanes in the US. Two of them have been since the year 2000.
1930-1931 , 1981-1982, 2000-2001 and 2009-2010
Chronological List of All Hurricanes
NOAA would consider the lack of extreme weather to be extreme.
There certainly seems to be an extreme lack of extreme weather these days 😎
Even with today’s increasingly hypersensitive detection devices, there are fewer US hurricanes.
The lack of hurricanes is worse than Trenberth thought so it automatically qualifies as an extreme event.