Tornado Risk in Henry County, IA
How likely is a tornado in Henry County, IA?
20 tornado tracks have crossed Henry County since 1957 by NOAA's count, roughly one every 3.8 years - the Moderate band on this site's scale. That is the 50th percentile nationally for tornado frequency. Among 99 Iowa counties in this dataset, Henry County ranks 88 for how often a tornado touches down.
The number that matters more than frequency
No violent (EF4-5) tornado has been recorded in Henry County in NOAA's 76-year database. Of its 20 recorded tracks, 16 were weak (EF0-1) and 4 significant (EF2-3).
Shelter and safe-room economics
Iowa does not currently have a confirmed state rebate layered on top of FEMA's 75% Hazard Mitigation cost-share, so a Henry 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 Henry County to lose power - outbreak-wide outages across Iowa 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 Henry County's figure does not tell you
Henry County's figure is county-wide, not address-specific. Henry County covers about 434 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. Henry County has about 19,361 residents.