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EF1 tornado in Webster Parish, Louisiana

Tornado April 26, 2011 · Webster Parish, Louisiana

EF1
Rating
6.5 mi
Path length
150 yd
Path width
$100K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

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 EF1 means. On the Enhanced Fujita scale, EF1 is moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken, consistent with estimated gusts of 86–110 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

The National Weather Service conducted a storm survey in Webster Parish, Louisiana near Dubberly and concluded that damage was the result of an EF1 tornado. Numerous trees were snapped and uprooted south of Sibley, east of Hwy. 371. The tornado continued northeast into Dubberly where several homes sustained roof damage. Numerous trees were snapped and uprooted along Hwy 531 north of Dubberly. The tornado lifted as it approached Interstate 20. The storm responsible for this tornado is the same cell that produced a 42 mile long track across Desoto Parish. Maximum winds are estimated at 95-105 mph.

The wider storm

A very volatile atmosphere developed during the late afternoon...evening and overnight hours of April 26th across the Four State Region. An area of low pressure moved from the Texas Hill Country into Northeast Texas during the afternoon. Meanwhile, a warm front had moved northward from central Louisiana and was oriented west to east near the Arkansas/Louisiana state line. A dry line had moved just east of the I-35 corridor of North Central Texas and a strong cold front trailed the dry line. Very strong speed and directional shear was noted in the low and mid levels of the atmosphere such that supercells developed. Many of these produced tornadoes across the region. Other storms produced strong straight line wind gusts with bowing segments and large hail.

Began near Ogden (32.4940, -93.2950).

Other tornadoes from the same storm system

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

Source: NOAA Storm Events Database, event 293828. Narratives are written by the National Weather Service forecast office that issued the report.

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