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EF0 tornado in Karnes County, Texas

Tornado March 20, 2012 · Karnes County, Texas

EF0

Rating

0.2 mi

Path length

30 yd

Path width

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 30 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

A small weak EF0 tornado formed along the leading edge of a large cluster of storms in Runge, crossing a few neighborhood streets. Most damage was confined to house roofs, outbuildings, and trees.

The wider storm

A deep upper level trough of low pressure and strong cold front moved into an area of deep boundary layer moisture. The system initially produced supercell thunderstorms which produced several tornadoes and large hail. There storms then transitioned into a quasi-linear convective system that produced heavy rainfall and flooding.

Began near Runge (28.8810, -97.7177).

Other tornadoes from the same storm system

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

EF2 Bexar County EF2 Medina County EF1 Medina County EF0 Bexar County EF0 Bexar County

Source: NOAA Storm Events Database, event 368122. Narratives are written by the National Weather Service forecast office that issued the report.

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