Tornado Risk in Gilliam County, OR
Gilliam County, OR: what NOAA's tornado record says
1 tornado track have crossed Gilliam County since 1957 by NOAA's count, roughly one every 76.9 years - the Minimal band on this site's scale. That is the 4th percentile nationally for tornado frequency. Within Oregon alone, Gilliam County ranks 29 of 36 counties for tornado frequency.
The number that matters more than frequency
No violent (EF4-5) tornado has been recorded in Gilliam County in NOAA's 76-year database. Of its 1 recorded tracks, 1 were weak (EF0-1) and 0 significant (EF2-3).
Shelter and safe-room economics
Oregon does not currently have a confirmed state rebate layered on top of FEMA's 75% Hazard Mitigation cost-share, so a Gilliam 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 Oregon often reaches homes the storm itself never touched. A battery-backup unit covers the outage without the fuel and venting a generator needs.
What Gilliam County's figure does not tell you
Gilliam County's figure is county-wide, not address-specific. Gilliam County covers about 1,205 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. Gilliam County has about 1,971 residents.