F4 tornado in Polk County, Florida
Tornado April 15, 1958 · Polk County, Florida
F4
Rating
300 yd
Path width
7
Injuries
$25K
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 F4 means. This tornado was rated on Fujita’s original scale, used until 2007. F4 meant devastating damage: well-built houses levelled; the scale paired it with winds of 207–260 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 9988331. Narratives are written by the National Weather Service forecast office that issued the report.
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