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F1 tornado in Monona County, Iowa

Tornado May 16, 1999 · Monona County, Iowa

Rating

22.5 mi

Whole path

100 yd

Path width

$620K

Damage as recorded

NOAA records this tornado county by county. Its path ran through Monona County → Crawford County; the totals above are for the whole tornado.

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The path drawn at its surveyed width of 100 yards (0.06 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What F1 means. This tornado was rated on Fujita’s original scale, used until 2007. F1 meant moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken; the scale paired it with winds of 73–112 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.

What the National Weather Service wrote

Two homes sustained moderate to major damage, 3 grain bins and other outbuildings destroyed. Several vehicles were carried some distance. Large tree uprooted.

Began near Ute (42.0800, -95.7500).

Source: NOAA Storm Events Database, event 5697017. Narratives are written by the National Weather Service forecast office that issued the report.

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