EF0 tornado in Allegheny County, Pennsylvania

Tornado August 9, 2007 · Allegheny County, Pennsylvania

EF0

Rating

0.5 mi

Path length

200 yd

Path width

$100K

Damage as recorded

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 200 yards (0.11 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

An NWS Survey found and EF0 tornado touched down in the West End area of Pittsburgh affecting areas along Toledo, Municipal, and Greenway Streets. Numerous trees were snapped and power lines were down. There was some structural damage to a few homes and buildings. Maximum estimated winds were 85 MPH.

The wider storm

Three separate mesoscale convective systems moved across Southeast Ohio, Western Pennsylvania, Northern West Virginia, and Garrett county Maryland. Widespread wind damage, flash flooding, and an EF0 tornado occurred during the event. The tornado touched down in the West End of Pittsburgh. Significant flash flooding occurred in Millvale in Allegheny county.

Began near Option (40.4300, -79.9931).

Source: NOAA Storm Events Database, event 53744. Narratives are written by the National Weather Service forecast office that issued the report.

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