Butte County, SD Tornado Risk & Storm Shelter Cost
How likely is a tornado in Butte County, SD?
Since 1955, NOAA has logged 17 tornado tracks crossing Butte County - one about every 4.5 years, which lands it in our Moderate band. Nationally, Butte County ranks at the 44th percentile for tornado frequency. Among 66 South Dakota counties in this dataset, Butte County ranks 56 for how often a tornado touches down.
Butte County's EF4-5 history
Butte County's record has no EF4-5 tornado - its 17 tracks split 13 weak and 2 significant. That does not rule one out in the future, only that none has been recorded since 1950.
What a storm shelter costs near Butte County
For a Butte 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
The storm that misses Butte County outright can still take its power out - outbreak-scale outages across South Dakota are common well beyond the tracked path. A battery-backup unit handles that without a generator's setup or fuel.
Read this before you rely on it
This is a county-level figure, not a per-address probability. Butte County covers about 2,250 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. Butte County has about 10,891 residents.