Brookings County, SD: Tornado Risk and Shelter Cost
Brookings County, SD: what NOAA's tornado record says
NOAA's Storm Prediction Center has recorded 35 tornado tracks touching Brookings County since 1965 - about one every 2.2 years on average. That puts it in our Elevated band nationally. Against the rest of the country, that is the 75th percentile for frequency. Among 66 South Dakota counties in this dataset, Brookings County ranks 21 for how often a tornado touches down.
Has Brookings County ever had a violent tornado?
Yes, 1 time: Brookings 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 Brookings 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
36,359 people live in Brookings County, and a tornado outbreak's power loss usually reaches far more of South Dakota than the tracks themselves touch. A portable battery unit is the faster, no-fuel way to bridge that outage.
County-level, not address-level
Treat this as a county-wide figure, not a prediction for one address. Brookings County covers about 792 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. Brookings County has about 36,359 residents.