Dunn County, WI: Tornado Risk and Shelter Cost
Dunn County's tornado history, by the numbers
NOAA's Storm Prediction Center has recorded 23 tornado tracks touching Dunn County since 1951 - about one every 3.3 years on average. That puts it in our Moderate band nationally. Against the rest of the country, that is the 57th percentile for frequency. Within Wisconsin alone, Dunn County ranks 39 of 72 counties for tornado frequency.
Has Dunn County ever had a violent tornado?
Yes, 1 time: Dunn County has an EF4-5 tornado on record. Wherever that history exists, FEMA's safe-room case applies regardless of how often the county gets touched overall.
Paying for it, if Dunn 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 Wisconsin 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 Wisconsin 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. Dunn County covers about 850 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. Dunn County has about 46,135 residents.