Heres my best shot at running some stats off the NCDC stats page. Any of you guys that are better with statistics than I am please feel free to correct me if I have made an error somewhere
ok here are the numbers using the NCDC storm event pages stats. I used Jan 1st to June 30th as my sample dates.
Of the years we have seen landfalling tropical storms and hurricanes in NC we saw 8 years since 1984. Those years are
1984- Diana
1996- Bertha/Fran
1998-Bonnie
1999- Dennis/Floyd
2003-Isabel
2004-Charley
2006-Ernesto
2008-Hanna
In those 8 years we had a total of 232 tornadoes with an avg of 29 a year.
In the other 18 years of no tropical landfalls we have a total of 174 tornadoes and an avg of only 9.6 a year. This number is thrown off by 2 of those years that saw high tornado counts in 1989 with 24 and 2009 with 31. So those 2 years account for 55 out of the 174 total. 2009 only had 8 named tropical systems all year as well.
4 out of the 8 years with tropical landfalls had years with 30+ plus tornadoes.
IMO there seems to be a pattern of more tropical activity in general for NC when we have an active spring with lots of tornadoes.