Tornado Risk in Fairfax County, VA
Fairfax County's tornado history, by the numbers
20 tornado tracks have crossed Fairfax County since 1952 by NOAA's count, roughly one every 3.8 years - the Moderate band on this site's scale. That is the 51st percentile nationally for tornado frequency. Among 133 Virginia counties in this dataset, Fairfax County ranks 5 for how often a tornado touches down.
The number that matters more than frequency
No violent (EF4-5) tornado has been recorded in Fairfax County in NOAA's 76-year database. Of its 20 recorded tracks, 15 were weak (EF0-1) and 5 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 Fairfax 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 Fairfax County outright can still take its power out - outbreak-scale outages across Virginia are common well beyond the tracked path. A battery-backup unit handles that without a generator's setup or fuel.
What Fairfax County's figure does not tell you
Fairfax County's figure is county-wide, not address-specific. Fairfax County covers about 391 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. Fairfax County has about 1,160,925 residents.