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EF0 tornado in Coosa County, Alabama

Tornado March 14, 2019 · Coosa County, Alabama

EF0
Rating
0.6 mi
Path length
40 yd
Path width
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 40 yards (0.02 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

National Weather Service meteorologists surveyed damage in Coosa County and determined that it was consistent with an EF0 tornado, with maximum sustained winds near 70 mph.

This brief weak tornado was from the same storm that produced the EF0 tornado in far western Coosa County. The only damage observed consisted of snapped and uprooted trees.

The wider storm

A widespread severe weather event occurred across central Alabama aduring the afternoon and evening hours on Thursday, March 14th. The event began in the northwest counties and spread eastward all the way to the Georgia state line. A strong low level jet of 40-50 knots, combined with moderate instability (1000-1500 J/kg) and 0-6km bulk shear of 55-50 knots, produced an atmosphere favorable for severe thunderstorms and supercells.

Began near Weogufka (33.0221, -86.2749).

Other tornadoes from the same storm system

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

Source: NOAA Storm Events Database, event 815063. Narratives are written by the National Weather Service forecast office that issued the report.

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