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EF1 tornado in Graves County, Kentucky

Tornado May 4, 2021 · Graves County, Kentucky

EF1
Rating
0.5 mi
Path length
100 yd
Path width
$15K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

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 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

The narrow, well-defined path was in a rural farmland and wooded area. A well-constructed modern home suffered minor to moderate roof damage. The tornado followed a creek bed for the last quarter mile, where a small patch of very large trees was snapped or uprooted. A well head was blown into a house, damaging the siding. Peak winds were estimated near 95 mph.

The wider storm

Clusters of storms, followed by a bowing line of thunderstorms, organized and accelerated east-northeastward during the overnight and wee morning hours. Several tornadoes accompanied mesovortices along the bowing line of storms. In addition, a particularly strong microburst was associated with the line. Finally, the occurrence of multiple thunderstorms resulted in localized flash flooding in the Pennyrile region. A mid-level shortwave trough moved east across the southern Plains. A belt of stronger southwesterly 500 mb winds spread northeast ahead of the trough into southeast Missouri and Arkansas. Instability was sufficient for a round of severe thunderstorms to occur.

Began near Mayfield Graves Arpt (36.7580, -88.5780).

Other tornadoes from the same storm system

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

Source: NOAA Storm Events Database, event 949848. Narratives are written by the National Weather Service forecast office that issued the report.

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