Bon Homme County, SD Tornado Risk & Storm Shelter Cost
Bon Homme County, SD: what NOAA's tornado record says
Since 1954, NOAA has logged 26 tornado tracks crossing Bon Homme County - one about every 2.9 years, which lands it in our Elevated band. Nationally, Bon Homme County ranks at the 61st percentile for tornado frequency. Within South Dakota alone, Bon Homme County ranks 36 of 66 counties for tornado frequency.
Bon Homme County's EF4-5 history
Bon Homme County's record has no EF4-5 tornado - its 26 tracks split 17 weak and 8 significant. That does not rule one out in the future, only that none has been recorded since 1950.
What a storm shelter costs near Bon Homme County
For a Bon Homme County homeowner, budget $2,890-$13,280 for a shelter or safe room ($7,645 typical) - this pass found no South Dakota-specific rebate on top of FEMA's underlying 75% national cost-share program.
The outage nobody plans for
Tornado outbreaks routinely knock out power across South Dakota 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.
Read this before you rely on it
This is a county-level figure, not a per-address probability. Bon Homme County covers about 564 square miles, so a single touch here counts the same as a single touch in a county a fraction of that size. Pre-radar-era records (before the 1990s) are also documented by NOAA as undercounting weaker tornadoes in sparsely-instrumented areas. Bon Homme County has about 7,071 residents.