Tornado Risk in Hawaii County, HI
How likely is a tornado in Hawaii County, HI?
8 tornado tracks have crossed Hawaii County since 1955 by NOAA's count, roughly one every 9.5 years - the Low band on this site's scale. That is the 25th percentile nationally for tornado frequency. Within Hawaii alone, Hawaii County ranks 2 of 5 counties for tornado frequency.
The number that matters more than frequency
No violent (EF4-5) tornado has been recorded in Hawaii County in NOAA's 76-year database. Of its 8 recorded tracks, 7 were weak (EF0-1) and 1 significant (EF2-3).
Shelter and safe-room economics
Hawaii does not currently have a confirmed state rebate layered on top of FEMA's 75% Hazard Mitigation cost-share, so a Hawaii 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 Hawaii County outright can still take its power out - outbreak-scale outages across Hawaii are common well beyond the tracked path. A battery-backup unit handles that without a generator's setup or fuel.
What Hawaii County's figure does not tell you
Hawaii County's figure is county-wide, not address-specific. Hawaii County covers about 4,028 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. Hawaii County has about 209,790 residents.