Arapahoe County, CO Tornado Risk & Storm Shelter Cost
Arapahoe County's tornado history, by the numbers
Since 1964, NOAA has logged 103 tornado tracks crossing Arapahoe County - one about every 0.7 years, which lands it in our High band. Nationally, Arapahoe County ranks at the 99th percentile for tornado frequency. Within Colorado alone, Arapahoe County ranks 8 of 64 counties for tornado frequency.
Arapahoe County's EF4-5 history
Arapahoe County's record has no EF4-5 tornado - its 103 tracks split 97 weak and 3 significant. That does not rule one out in the future, only that none has been recorded since 1950.
What a storm shelter costs near Arapahoe County
For a Arapahoe County homeowner, budget $2,890-$13,280 for a shelter or safe room ($7,645 typical) - this pass found no Colorado-specific rebate on top of FEMA's underlying 75% national cost-share program.
The outage nobody plans for
Power loss after a tornado outbreak in Colorado often reaches homes the storm itself never touched. A battery-backup unit covers the outage without the fuel and venting a generator needs.
Read this before you rely on it
This is a county-level figure, not a per-address probability. Arapahoe County covers about 798 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. Arapahoe County has about 666,918 residents.