Greene County, IL: Tornado Risk and Shelter Cost
Greene County's tornado history, by the numbers
NOAA's Storm Prediction Center has recorded 21 tornado tracks touching Greene County since 1952 - about one every 3.6 years on average. That puts it in our Moderate band nationally. Against the rest of the country, that is the 52nd percentile for frequency. Illinois has 102 counties in this dataset; Greene County ranks 71 of them by frequency.
Has Greene County ever had a violent tornado?
Nothing violent in Greene County's file: 21 tracks total, topping out at significant (EF2-3) strength on 5 of them, zero at EF4-5.
Paying for it, if Greene County's history says you should
A storm shelter or in-residence safe room typically runs $2,890-$13,280 nationally, around $7,645 for a common single-family installation. No state-administered rebate program specific to Illinois was confirmed for this site - FEMA's own Hazard Mitigation Assistance grants fund 75% of an approved safe room nationwide, but only some states currently run a homeowner-facing application on top of that.
The gap a shelter does not cover
Tornado outbreaks routinely knock out power across Illinois for days, separately from any single house getting hit. A portable battery bank keeps a fridge, phone chargers and a radio running through that gap - cheaper and faster to set up than a generator.
County-level, not address-level
Treat this as a county-wide figure, not a prediction for one address. Greene County covers about 543 square miles, so a single touch here counts the same as a single touch in a county a fraction of that size. And records from before the 1990s, NOAA notes, undercount weaker tornadoes in areas with less storm-spotting coverage at the time. Greene County has about 11,417 residents.