Tornado Risk in Winnebago County, WI
Winnebago County's tornado history, by the numbers
33 tornado tracks have crossed Winnebago County since 1956 by NOAA's count, roughly one every 2.3 years - the Elevated band on this site's scale. That is the 73rd percentile nationally for tornado frequency. Wisconsin has 72 counties in this dataset; Winnebago County ranks 19 of them by frequency.
The number that matters more than frequency
Yes. Winnebago County has recorded 3 EF4 or EF5 tornados - the strength FEMA's own safe-room guidance is built around, because a standard code-built house is not expected to survive those winds without a hardened room. A county can be lower-frequency overall and still carry this history.
Shelter and safe-room economics
Wisconsin does not currently have a confirmed state rebate layered on top of FEMA's 75% Hazard Mitigation cost-share, so a Winnebago County homeowner should expect the full national range: $2,890-$13,280, $7,645 typical.
Power after the storm, not just shelter during it
The storm that misses Winnebago County outright can still take its power out - outbreak-scale outages across Wisconsin are common well beyond the tracked path. A battery-backup unit handles that without a generator's setup or fuel.
What Winnebago County's figure does not tell you
Winnebago County's figure is county-wide, not address-specific. Winnebago County covers about 435 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. Winnebago County has about 173,307 residents.