How Likely Is a Tornado in Adams County, IA?
Adams County, IA: what NOAA's tornado record says
Adams 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: Adams County sees more tornado activity than 65% of US counties. Within Iowa alone, Adams County ranks 72 of 99 counties for tornado frequency.
Beyond the frequency band: violent history
3 tornados touching Adams County reached violent (EF4-5) strength since 1950. That single fact carries more weight for the shelter decision than the county's overall frequency band.
The dollar figure Adams 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
The storm that misses Adams County outright can still take its power out - outbreak-scale outages across Iowa are common well beyond the tracked path. A battery-backup unit handles that without a generator's setup or fuel.
What this number is, and is not
One caveat before relying on Adams County's number: it is county-wide, and it covers about 423 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. Adams County has about 3,606 residents.