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EF1 tornado in Warren County, Mississippi

Tornado April 30, 2017 · Warren County, Mississippi

EF1
Rating
9.2 mi
Whole path
440 yd
Path width
$100K
Damage as recorded

NOAA records this tornado county by county. Its path ran through Madison Parish, Louisiana → Warren County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 440 yards (0.25 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 tornado began just south of Interstate 20 around Delta, LA and traveled northeast to cross the Mississippi River on the northern outskirts of Vicksburg. The tornado widened to a maximum path width of 440 yards as it entered Warren County. It produced EF-1 rated damage along its path including numerous snapped hardwood trees, blown down power lines, damage to a garage door of a building along Haining Road, and broken power poles along North Washington Street north of Watersville. The tornado lifted just north of this location. A peak wind speed of 100 mph was estimated based on surveyed damage. A debris signature was observed by NWS radar and a University of Louisiana at Monroe research radar along the path of this tornado. Total path length was 9.2 miles.

The wider storm

During the early morning hours of April 30th, a squall line of severe thunderstorms developed across central Louisiana and pushed eastward across the ArkLaMiss. The line intensified as it approached the Mississippi River and caused wind damage and tornadoes. As the convective system evolved into Mississippi, numerous tornadoes developed along the advancing line, with the most prolific damage occurring along the track of a large meso-scale convective vortex (MCV). This feature tracked roughly from Claiborne County through western Hinds/Madison, eastern Yazoo, eastern Holmes, southeastern Carroll, Montgomery, and northwestern Webster counties. This corridor is where the most significant damage occurred, as well as one fatality. Flash flooding, hail, and other wind damage occurred as these storms moved through.

Began near National Cemetery (32.3749, -90.8750).

Other tornadoes from the same storm system

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

Source: NOAA Storm Events Database, event 698101. Narratives are written by the National Weather Service forecast office that issued the report.

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