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F4 tornado in Pembina County, North Dakota

Tornado June 6, 1999 · Pembina County, North Dakota

F4
Rating
8.0 mi
Path length
500 yd
Path width
$1.0M
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 500 yards (0.28 mi) — zoom in and the swath grows to true scale. 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.

What the National Weather Service wrote

A tornado touched down southeast of Mountain, where it damaged several farmsteads. One farm home was completely lifted up and tossed 100 yards. A combine was also picked up and thrown several hundred feet. A swather was picked up and wrapped around several trees. In the town of Mountain, numerous trees were knocked flat. 2 mobile homes were destroyed, the roof was torn off a house, and a garage was destroyed.

Began near Crystal (48.6000, -97.7800).

Other tornadoes from the same storm system

15 more tornadoes the National Weather Service filed under this storm episode.

F2 Walsh CountyF2 Walsh CountyF1 Nelson CountyF0 Benson CountyF0 Walsh CountyF0 Eddy CountyF0 Eddy CountyF0 Walsh CountyF0 Pembina CountyF0 Pembina CountyF0 Ramsey CountyF0 Ramsey CountyF0 Benson CountyF0 Benson CountyF0 Ramsey County

Source: NOAA Storm Events Database, event 5702027. Narratives are written by the National Weather Service forecast office that issued the report.

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