How Likely Is a Tornado in Monona County, IA?
Monona County, IA: what NOAA's tornado record says
Monona County has recorded 28 tornado touches in NOAA's 76-year database, a rate of roughly one every 2.7 years - our Elevated band. Put another way: Monona County sees more tornado activity than 65% of US counties. Within Iowa alone, Monona County ranks 70 of 99 counties for tornado frequency.
Beyond the frequency band: violent history
22 weak and 6 significant tornadoes make up Monona County's 28-track record - none violent. NOAA has never logged an EF4 or EF5 crossing this county.
The dollar figure Monona County's rating leads to
Cost nationally: $2,890-$13,280, about $7,645 typical. Iowa has no state rebate program confirmed here; FEMA's underlying 75% cost-share exists nationwide, but applying through a state program is what usually makes it real, and none was found for Iowa this pass.
What a direct hit isn't required for
Power loss after a tornado outbreak in Iowa often reaches homes the storm itself never touched. A battery-backup unit covers the outage without the fuel and venting a generator needs.
What this number is, and is not
One caveat before relying on Monona County's number: it is county-wide, and it covers about 694 square miles, so a single touch counts the same as one in a county a fraction of that size. Weaker pre-1990s tornadoes are also documented as undercounted in NOAA's own record. Monona County has about 8,429 residents.