So why are tornadoes a threat during landfalling tropical systems? It's a combination of many factors. Hurricanes already rotate, but add in the interaction of the storm with surface friction ...

Hurricane Center Why tropical systems brew tornadoes In 2004, Frances, a tropical storm by the time it reached the Carolinas, spawned 45 tornadoes in South Carolina and 11 in North Carolina.

Hurricane Ivan in 2004 produced the most tornadoes out of any tropical system on record with at least 117 confirmed, including 11 between both North and South Carolina.