How Likely Is a Tornado in Dauphin County, PA?
Dauphin County, PA: what NOAA's tornado record says
Dauphin County has recorded 21 tornado touches in NOAA's 76-year database, a rate of roughly one every 3.6 years - our Moderate band. Put another way: Dauphin County sees more tornado activity than 53% of US counties. Among 67 Pennsylvania counties in this dataset, Dauphin County ranks 14 for how often a tornado touches down.
Beyond the frequency band: violent history
17 weak and 4 significant tornadoes make up Dauphin County's 21-track record - none violent. NOAA has never logged an EF4 or EF5 crossing this county.
The dollar figure Dauphin County's rating leads to
Cost nationally: $2,890-$13,280, about $7,645 typical. Pennsylvania 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 Pennsylvania this pass.
What a direct hit isn't required for
Power loss after a tornado outbreak in Pennsylvania often reaches homes the storm itself never touched. A battery-backup unit covers the outage without the fuel and venting a generator needs.
What this number is, and is not
One caveat before relying on Dauphin County's number: it is county-wide, and it covers about 525 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. Dauphin County has about 293,029 residents.