Marshall County, IL: Tornado Risk and Shelter Cost
Marshall County's tornado history, by the numbers
NOAA's Storm Prediction Center has recorded 18 tornado tracks touching Marshall County since 1965 - about one every 4.2 years on average. That puts it in our Moderate band nationally. Against the rest of the country, that is the 46th percentile for frequency. Among 102 Illinois counties in this dataset, Marshall County ranks 79 for how often a tornado touches down.
Has Marshall County ever had a violent tornado?
Nothing violent in Marshall County's file: 18 tracks total, topping out at significant (EF2-3) strength on 5 of them, zero at EF4-5.
Paying for it, if Marshall 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
The storm that misses Marshall County outright can still take its power out - outbreak-scale outages across Illinois are common well beyond the tracked path. A battery-backup unit handles that without a generator's setup or fuel.
County-level, not address-level
Treat this as a county-wide figure, not a prediction for one address. Marshall County covers about 387 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. Marshall County has about 11,552 residents.