Tornado Risk in San Juan County, NM
San Juan County's tornado history, by the numbers
11 tornado tracks have crossed San Juan County since 1957 by NOAA's count, roughly one every 6.9 years - the Low band on this site's scale. That is the 32nd percentile nationally for tornado frequency. Among 33 New Mexico counties in this dataset, San Juan County ranks 19 for how often a tornado touches down.
The number that matters more than frequency
No violent (EF4-5) tornado has been recorded in San Juan County in NOAA's 76-year database. Of its 11 recorded tracks, 9 were weak (EF0-1) and 1 significant (EF2-3).
Shelter and safe-room economics
New Mexico does not currently have a confirmed state rebate layered on top of FEMA's 75% Hazard Mitigation cost-share, so a San Juan County homeowner should expect the full national range: $2,890-$13,280, $7,645 typical.
Power after the storm, not just shelter during it
A direct hit is not required for San Juan County to lose power - outbreak-wide outages across New Mexico 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 San Juan County's figure does not tell you
San Juan County's figure is county-wide, not address-specific. San Juan County covers about 5,517 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. San Juan County has about 120,817 residents.