Johnson County, WY Tornado Risk & Storm Shelter Cost
Johnson County, WY: what NOAA's tornado record says
Since 1971, NOAA has logged 22 tornado tracks crossing Johnson County - one about every 3.5 years, which lands it in our Moderate band. Nationally, Johnson County ranks at the 54th percentile for tornado frequency. Among 23 Wyoming counties in this dataset, Johnson County ranks 14 for how often a tornado touches down.
Johnson County's EF4-5 history
Johnson County's record has no EF4-5 tornado - its 22 tracks split 20 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 Johnson County
For a Johnson County homeowner, budget $2,890-$13,280 for a shelter or safe room ($7,645 typical) - this pass found no Wyoming-specific rebate on top of FEMA's underlying 75% national cost-share program.
The outage nobody plans for
The storm that misses Johnson County outright can still take its power out - outbreak-scale outages across Wyoming 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. Johnson County covers about 4,154 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. Johnson County has about 8,803 residents.