How Likely Is a Tornado in Pierce County, WA?
Pierce County's tornado history, by the numbers
Pierce County has recorded 9 tornado touches in NOAA's 76-year database, a rate of roughly one every 8.5 years - our Low band. Put another way: Pierce County sees more tornado activity than 27% of US counties. Within Washington alone, Pierce County ranks 4 of 39 counties for tornado frequency.
Beyond the frequency band: violent history
9 weak and 0 significant tornadoes make up Pierce County's 9-track record - none violent. NOAA has never logged an EF4 or EF5 crossing this county.
The dollar figure Pierce County's rating leads to
Cost nationally: $2,890-$13,280, about $7,645 typical. Washington has no state rebate program confirmed here; FEMA's underlying 75% cost-share exists nationwide, but applying through a state program is what usually makes it real, and none was found for Washington this pass.
What a direct hit isn't required for
Tornado outbreaks routinely knock out power across Washington for days, separately from any single house getting hit. A portable battery bank keeps a fridge, phone chargers and a radio running through that gap - cheaper and faster to set up than a generator.
What this number is, and is not
One caveat before relying on Pierce County's number: it is county-wide, and it covers about 1,668 square miles, so a single touch counts the same as one in a county a fraction of that size. Weaker pre-1990s tornadoes are also documented as undercounted in NOAA's own record. Pierce County has about 941,170 residents.