Tornado Risk in Grayson County, VA
Grayson County's tornado history, by the numbers
4 tornado tracks have crossed Grayson County since 1959 by NOAA's count, roughly one every 18.9 years - the Minimal band on this site's scale. That is the 13th percentile nationally for tornado frequency. Within Virginia alone, Grayson County ranks 81 of 133 counties for tornado frequency.
The number that matters more than frequency
No violent (EF4-5) tornado has been recorded in Grayson County in NOAA's 76-year database. Of its 4 recorded tracks, 4 were weak (EF0-1) and 0 significant (EF2-3).
Shelter and safe-room economics
Virginia does not currently have a confirmed state rebate layered on top of FEMA's 75% Hazard Mitigation cost-share, so a Grayson County homeowner should expect the full national range: $2,890-$13,280, $7,645 typical.
Power after the storm, not just shelter during it
Power loss after a tornado outbreak in Virginia often reaches homes the storm itself never touched. A battery-backup unit covers the outage without the fuel and venting a generator needs.
What Grayson County's figure does not tell you
Grayson County's figure is county-wide, not address-specific. Grayson County covers about 442 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. Grayson County has about 15,265 residents.