Tornado Risk in Buchanan County, MO
Buchanan County's tornado history, by the numbers
20 tornado tracks have crossed Buchanan County since 1956 by NOAA's count, roughly one every 3.8 years - the Moderate band on this site's scale. That is the 51st percentile nationally for tornado frequency. Missouri has 115 counties in this dataset; Buchanan County ranks 73 of them by frequency.
The number that matters more than frequency
No violent (EF4-5) tornado has been recorded in Buchanan County in NOAA's 76-year database. Of its 20 recorded tracks, 15 were weak (EF0-1) and 5 significant (EF2-3).
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 Buchanan County homeowner should expect the full national range: $2,890-$13,280, $7,645 typical.
Power after the storm, not just shelter during it
83,574 people live in Buchanan 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 Buchanan County's figure does not tell you
Buchanan County's figure is county-wide, not address-specific. Buchanan County covers about 408 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. Buchanan County has about 83,574 residents.