Custer County, ID Tornado Risk & Storm Shelter Cost
Custer County's tornado history, by the numbers
Since 2008, NOAA has logged 2 tornado tracks crossing Custer County - one about every 38.5 years, which lands it in our Minimal band. Nationally, Custer County ranks at the 7th percentile for tornado frequency. Idaho has 44 counties in this dataset; Custer County ranks 36 of them by frequency.
Custer County's EF4-5 history
Custer County's record has no EF4-5 tornado - its 2 tracks split 2 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 Custer County
For a Custer 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. Custer County covers about 4,922 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. Custer County has about 4,597 residents.