Tornado Risk in Knox County, MO
Knox County's tornado history, by the numbers
10 tornado tracks have crossed Knox County since 1967 by NOAA's count, roughly one every 7.6 years - the Low band on this site's scale. That is the 27th percentile nationally for tornado frequency. Within Missouri alone, Knox County ranks 111 of 115 counties for tornado frequency.
The number that matters more than frequency
Yes. Knox County has recorded 1 EF4 or EF5 tornado - the strength FEMA's own safe-room guidance is built around, because a standard code-built house is not expected to survive those winds without a hardened room. A county can be lower-frequency overall and still carry this history.
Shelter and safe-room economics
Missouri does not currently have a confirmed state rebate layered on top of FEMA's 75% Hazard Mitigation cost-share, so a Knox County homeowner should expect the full national range: $2,890-$13,280, $7,645 typical.
Power after the storm, not just shelter during it
3,740 people live in Knox County, and a tornado outbreak's power loss usually reaches far more of Missouri than the tracks themselves touch. A portable battery unit is the faster, no-fuel way to bridge that outage.
What Knox County's figure does not tell you
Knox County's figure is county-wide, not address-specific. Knox County covers about 504 square miles, so a single touch here counts the same as a single touch in a county a fraction of that size. NOAA also documents that older records undercount weaker tornadoes from before Doppler radar became standard. Knox County has about 3,740 residents.