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EF0 tornado in De Kalb County, Missouri

Tornado May 20, 2021 · De Kalb County, Missouri

EF0

Rating

0.9 mi

Path length

50 yd

Path width

$5K

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 EF0 means. On the Enhanced Fujita scale, EF0 is light damage: shingles and siding peeled, gutters torn, branches broken, consistent with estimated gusts of 65–85 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

Emergency management from DeKalb County notified the office that there were power poles and power lines down on two roads that are about a mile apart. The path of damage between these two roads was pretty narrow, and radar indicated some weak rotation, so a tornado was deemed the reason for the damage.

The wider storm

Within an area of scattered convection an isolated weak tornado formed and damaged power lines and power poles within a narrow south to north path on two west-east roads about a mile apart.

Began near Osborn (39.7530, -94.2773).

Source: NOAA Storm Events Database, event 959955. Narratives are written by the National Weather Service forecast office that issued the report.

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