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EF1 tornado in Graves County, Kentucky

Tornado October 14, 2012 · Graves County, Kentucky

EF1
Rating
2.3 mi
Path length
150 yd
Path width
1
Injury
$350K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 150 yards (0.09 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

Top wind speeds were estimated near 105 mph. The average path width was 130 yards. Two dozen homes and several businesses received minor damage, mainly to shingles, siding, and fascia. There was moderate damage to one business, which was partially unroofed. Windows were blown out, and cars were moved over. Numerous trees and power lines were blown down. A high school football stadium was extensively damaged. The damage path began about one-quarter mile southeast of the Highway 80 and Purchase Parkway intersection. The moderately damaged business was located near the beginning of the damage path. A man was hospitalized after a section of wind-blown roof from the damaged business blew into the room he was in. The man suffered numerous cuts and broken bones. His house was heavily damaged. A 2x4 stud was driven by the wind and became embedded in a living room interior wall. The tornado damage path ended about one-half mile northeast of the intersection of Highways 45 and 121.

The wider storm

A broken line of showers and thunderstorms swept eastward ahead of a strong cold front over western Missouri. The line of convection was fueled by very strong southerly low level winds from 50 to 60 knots at 850 mb. An isolated tornado occurred in this very high-shear environment, despite the lack of any cloud-to-ground lightning with the parent cell. Strong forcing and wind shear compensated for very weak instability.

Began near Mayfield (36.7354, -88.6631).

Source: NOAA Storm Events Database, event 411059. Narratives are written by the National Weather Service forecast office that issued the report.

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