F0 tornado in Canadian County, Oklahoma

Tornado May 22, 1957 · Canadian County, Oklahoma

Rating

33 yd

Path width

$2K

Damage as recorded

EF0EF1EF2EF3EF4EF5Unrated

NOAA recorded where this tornado touched down but not where it lifted, so it appears as a point. Other tornadoes recorded nearby that day are shown faint.

What F0 means. This tornado was rated on Fujita’s original scale, used until 2007. F0 meant light damage: shingles and siding peeled, gutters torn, branches broken; the scale paired it with winds of 40–72 mph, figures later judged too high, especially toward the top of the scale, and revised downward in the Enhanced Fujita scale. Ratings then, as now, came from the damage.

NOAA’s online database has no written narrative for tornadoes before 1996 — just the numbers above, transcribed from the original storm logs. (NOAA’s monthly Storm Data publications, which carry written accounts, begin in 1959.)

Source: NOAA Storm Events Database, event 10096533. Narratives are written by the National Weather Service forecast office that issued the report.

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