Tornado Risk in Clinton County, IL
How likely is a tornado in Clinton County, IL?
27 tornado tracks have crossed Clinton County since 1958 by NOAA's count, roughly one every 2.8 years - the Elevated band on this site's scale. That is the 64th percentile nationally for tornado frequency. Illinois has 102 counties in this dataset; Clinton County ranks 55 of them by frequency.
The number that matters more than frequency
No violent (EF4-5) tornado has been recorded in Clinton County in NOAA's 76-year database. Of its 27 recorded tracks, 20 were weak (EF0-1) and 6 significant (EF2-3).
Shelter and safe-room economics
Illinois does not currently have a confirmed state rebate layered on top of FEMA's 75% Hazard Mitigation cost-share, so a Clinton County homeowner should expect the full national range: $2,890-$13,280, $7,645 typical.
Power after the storm, not just shelter during it
A direct hit is not required for Clinton County to lose power - outbreak-wide outages across Illinois regularly reach homes and businesses well outside the actual tracks. A battery bank covers that gap without a generator's fuel and venting needs.
What Clinton County's figure does not tell you
Clinton County's figure is county-wide, not address-specific. Clinton County covers about 474 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. Clinton County has about 37,087 residents.