F2 tornado in La Moure County, North Dakota

Tornado August 15, 1999 · La Moure County, North Dakota

Rating

8.5 mi

Whole path

400 yd

Path width

$5K

Damage as recorded

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

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The path drawn at its surveyed width of 400 yards (0.23 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What F2 means. This tornado was rated on Fujita’s original scale, used until 2007. F2 meant considerable damage: roofs torn off well-built houses, mobile homes destroyed, large trees snapped or uprooted; the scale paired it with winds of 113–157 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

The storm survey was completed by NWS Grand Forks. The tornado started in Barnes county 1.5 miles southwest of Litchville, moved across far northeast LaMoure county, and dissipated in Ransom county 6 miles north of Lisbon. The total path length was 20 miles.

Began near Marion (46.6500, -98.1800).

Source: NOAA Storm Events Database, event 5710284. Narratives are written by the National Weather Service forecast office that issued the report.

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