Bonner County, ID Tornado Risk & Storm Shelter Cost
How likely is a tornado in Bonner County, ID?
Since 1978, NOAA has logged 4 tornado tracks crossing Bonner County - one about every 18.9 years, which lands it in our Minimal band. Nationally, Bonner County ranks at the 14th percentile for tornado frequency. Among 44 Idaho counties in this dataset, Bonner County ranks 20 for how often a tornado touches down.
Bonner County's EF4-5 history
Bonner County's record has no EF4-5 tornado - its 4 tracks split 3 weak and 1 significant. That does not rule one out in the future, only that none has been recorded since 1950.
What a storm shelter costs near Bonner County
For a Bonner 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
Power loss after a tornado outbreak in Idaho 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. Bonner County covers about 1,733 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. Bonner County has about 53,955 residents.