How Likely Is a Tornado in Greene County, IA?
How likely is a tornado in Greene County, IA?
Greene County has recorded 35 tornado touches in NOAA's 76-year database, a rate of roughly one every 2.2 years - our Elevated band. Put another way: Greene County sees more tornado activity than 75% of US counties. Within Iowa alone, Greene County ranks 48 of 99 counties for tornado frequency.
Beyond the frequency band: violent history
1 tornado touching Greene 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 Greene 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 Greene County's number: it is county-wide, and it covers about 570 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. Greene County has about 8,662 residents.