Tornado Risk in Lewis County, WA
How likely is a tornado in Lewis County, WA?
3 tornado tracks have crossed Lewis County since 1965 by NOAA's count, roughly one every 25.6 years - the Minimal band on this site's scale. That is the 12th percentile nationally for tornado frequency. Among 39 Washington counties in this dataset, Lewis County ranks 15 for how often a tornado touches down.
The number that matters more than frequency
No violent (EF4-5) tornado has been recorded in Lewis County in NOAA's 76-year database. Of its 3 recorded tracks, 2 were weak (EF0-1) and 1 significant (EF2-3).
Shelter and safe-room economics
Washington does not currently have a confirmed state rebate layered on top of FEMA's 75% Hazard Mitigation cost-share, so a Lewis County homeowner should expect the full national range: $2,890-$13,280, $7,645 typical.
Power after the storm, not just shelter during it
87,049 people live in Lewis County, and a tornado outbreak's power loss usually reaches far more of Washington than the tracks themselves touch. A portable battery unit is the faster, no-fuel way to bridge that outage.
What Lewis County's figure does not tell you
Lewis County's figure is county-wide, not address-specific. Lewis County covers about 2,403 square miles, so a single touch here counts the same as a single touch in a county a fraction of that size. NOAA also documents that older records undercount weaker tornadoes from before Doppler radar became standard. Lewis County has about 87,049 residents.