Mason County, IL Tornado Risk & Storm Shelter Cost
Mason County's tornado history, by the numbers
Since 1951, NOAA has logged 41 tornado tracks crossing Mason County - one about every 1.9 years, which lands it in our High band. Nationally, Mason County ranks at the 81st percentile for tornado frequency. Within Illinois alone, Mason County ranks 28 of 102 counties for tornado frequency.
Mason County's EF4-5 history
Mason County's record has no EF4-5 tornado - its 41 tracks split 31 weak and 10 significant. That does not rule one out in the future, only that none has been recorded since 1950.
What a storm shelter costs near Mason County
For a Mason County homeowner, budget $2,890-$13,280 for a shelter or safe room ($7,645 typical) - this pass found no Illinois-specific rebate on top of FEMA's underlying 75% national cost-share program.
The outage nobody plans for
12,543 people live in Mason County, and a tornado outbreak's power loss usually reaches far more of Illinois than the tracks themselves touch. A portable battery unit is the faster, no-fuel way to bridge that outage.
Read this before you rely on it
This is a county-level figure, not a per-address probability. Mason County covers about 539 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. Mason County has about 12,543 residents.