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EF1 tornado in Lyon County, Kentucky

Tornado April 10, 2009 · Lyon County, Kentucky

EF1
Rating
0.3 mi
Path length
50 yd
Path width
1
Injury
$70K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 50 yards (0.03 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF1 means. On the Enhanced Fujita scale, EF1 is moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken, consistent with estimated gusts of 86–110 mph. The rating comes from a survey of the worst damage after the storm, not from a wind measurement, so it says as much about what the tornado hit as about how strong it was.

What the National Weather Service wrote

This short-lived tornado began on the north side of exit 4 of the Western Kentucky Parkway. The tornado path stayed along the north side of U.S. Highway 62. The end wall of a commercial building was blown out. A mobile home was overturned. Another mobile home was unroofed. Two vehicles were damaged. Several trees and power lines were down. Two eyewitnesses observed the tornado from the south side of exit 4. One person was slightly injured when a glass window was blown out of his mobile home. He refused treatment for his hand injury. Peak winds were estimated near 90 mph.

The wider storm

A strong low pressure system tracked east to the Lower Ohio Valley, with a trailing cold front sweeping east across western Kentucky. Storms developed and increased along the advancing cold front as they moved into increasingly unstable air. Very strong low level wind shear was favorable for tornadoes. The storms became increasingly organized, with line segments and supercells moving at over 45 mph.

Began near Saratoga (37.1075, -88.0315).

Other tornadoes from the same storm system

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

Source: NOAA Storm Events Database, event 159906. Narratives are written by the National Weather Service forecast office that issued the report.

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