Davison County, SD: Tornado Risk and Shelter Cost
How likely is a tornado in Davison County, SD?
NOAA's Storm Prediction Center has recorded 24 tornado tracks touching Davison County since 1953 - about one every 3.2 years on average. That puts it in our Moderate band nationally. Against the rest of the country, that is the 58th percentile for frequency. Within South Dakota alone, Davison County ranks 39 of 66 counties for tornado frequency.
Has Davison County ever had a violent tornado?
Nothing violent in Davison County's file: 24 tracks total, topping out at significant (EF2-3) strength on 9 of them, zero at EF4-5.
Paying for it, if Davison 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 South Dakota 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
A direct hit is not required for Davison County to lose power - outbreak-wide outages across South Dakota regularly reach homes and businesses well outside the actual tracks. A battery bank covers that gap without a generator's fuel and venting needs.
County-level, not address-level
Treat this as a county-wide figure, not a prediction for one address. Davison County covers about 436 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. Davison County has about 19,907 residents.