San Juan County, CO Tornado Risk & Storm Shelter Cost
San Juan County's tornado history, by the numbers
San Juan County carries no recorded tornado touch anywhere in NOAA's 1950-2025 database - a real zero, the same result most of the Northeast and Pacific coast gets. Nationally, San Juan County ranks at the 0th percentile for tornado frequency. Within Colorado alone, San Juan County ranks 63 of 64 counties for tornado frequency.
San Juan County's EF4-5 history
San Juan County's record has no EF4-5 tornado - its 0 tracks split 0 weak and 0 significant. That does not rule one out in the future, only that none has been recorded since 1950.
What a storm shelter costs near San Juan County
For a San Juan 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
The storm that misses San Juan County outright can still take its power out - outbreak-scale outages across Colorado 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. San Juan County covers about 388 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. San Juan County has about 821 residents.