Boise County, ID Tornado Risk & Storm Shelter Cost
Boise County, ID: what NOAA's tornado record says
Boise 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, Boise County ranks at the 2nd percentile for tornado frequency. Among 44 Idaho counties in this dataset, Boise County ranks 44 for how often a tornado touches down.
Boise County's EF4-5 history
Boise 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 Boise County
For a Boise County homeowner, budget $2,890-$13,280 for a shelter or safe room ($7,645 typical) - this pass found no Idaho-specific rebate on top of FEMA's underlying 75% national cost-share program.
The outage nobody plans for
The storm that misses Boise County outright can still take its power out - outbreak-scale outages across Idaho 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. Boise County covers about 1,899 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. Boise County has about 8,581 residents.