Island County, WA Tornado Risk & Storm Shelter Cost
How likely is a tornado in Island County, WA?
Island 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, Island County ranks at the 3rd percentile for tornado frequency. Among 39 Washington counties in this dataset, Island County ranks 30 for how often a tornado touches down.
Island County's EF4-5 history
Island 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 Island County
For a Island County homeowner, budget $2,890-$13,280 for a shelter or safe room ($7,645 typical) - this pass found no Washington-specific rebate on top of FEMA's underlying 75% national cost-share program.
The outage nobody plans for
The storm that misses Island County outright can still take its power out - outbreak-scale outages across Washington 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. Island County covers about 209 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. Island County has about 86,478 residents.