F1 tornado in Knox County, Texas

Tornado May 13, 2005 · Knox County, Texas

Rating

4.0 mi

Path length

150 yd

Path width

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The path drawn at its surveyed width of 150 yards (0.09 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What F1 means. This tornado was rated on Fujita’s original scale, used until 2007. F1 meant moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken; the scale paired it with winds of 73–112 mph, figures later judged too high, especially toward the top of the scale, and revised downward in the Enhanced Fujita scale. Ratings then, as now, came from the damage.

What the National Weather Service wrote

This tornado was observed by several experienced storm chasers and the mobile radar, Doppler On Wheels (DOW). The tornado became better organized around 1740 CST as observed by the chasers and the DOW information. Preliminary analysis of data from the Doppler On Wheels indicated a maximum wind velocity of 49 m/s (approx. 110 mph) at 1745 CST just before the tornado dissipated. This tornado occurred in a remote part of the county where no damage was reported.

Began near Truscott (33.7167, -99.7500).

Other tornadoes from the same storm system

1 more tornado the National Weather Service filed under this storm episode.

F3 Knox County

Source: NOAA Storm Events Database, event 5449016. Narratives are written by the National Weather Service forecast office that issued the report.

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