How Likely Is a Tornado in Calvert County, MD?
Calvert County, MD: what NOAA's tornado record says
Calvert County has recorded 19 tornado touches in NOAA's 76-year database, a rate of roughly one every 4 years - our Moderate band. Put another way: Calvert County sees more tornado activity than 49% of US counties. Within Maryland alone, Calvert County ranks 12 of 24 counties for tornado frequency.
Beyond the frequency band: violent history
1 tornado touching Calvert County reached violent (EF4-5) strength since 1950. That single fact carries more weight for the shelter decision than the county's overall frequency band.
The dollar figure Calvert County's rating leads to
Cost nationally: $2,890-$13,280, about $7,645 typical. Maryland 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 Maryland this pass.
What a direct hit isn't required for
A direct hit is not required for Calvert County to lose power - outbreak-wide outages across Maryland regularly reach homes and businesses well outside the actual tracks. A battery bank covers that gap without a generator's fuel and venting needs.
What this number is, and is not
One caveat before relying on Calvert County's number: it is county-wide, and it covers about 213 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. Calvert County has about 94,913 residents.