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EF4 tornado in Walthall County, Mississippi

Tornado April 12, 2020 · Walthall County, Mississippi

EF4
Rating
21.2 mi
Whole path
1,300 yd
Path width
4
Deaths
3
Injuries
$2.8M
Damage as recorded

NOAA records this tornado county by county. Its path ran through Walthall County → Lawrence County → Marion County → Jefferson Davis County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 1,300 yards (0.74 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF4 means. On the Enhanced Fujita scale, EF4 is devastating damage: well-built houses levelled, consistent with estimated gusts of 166–200 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 touched down near Jefferson Rd just east of the intersection with

Jack Foil Rd. It quickly strengthened as it moved northeastward through the Hope area where it produced damage consistent with 115 mph winds. It also quickly grew in width and was roughly 1200 yd/0.67 mi wide by the time it approached Hwy 27. As it crossed Hwy 27 it continued to cause significant damage along East Sartinville Rd. The tornado was strongest as it approached James Ratcliff Rd. Two homes on this road were leveled, one being reduced to a slab. Consultation with subject matter experts including both engineers and experts in forensic tornado damage analysis supports raising the maximum intensity to 170 mph based on the house that was reduced to a slab and a large hard wood tree that was uprooted and tossed several feet from where it stood. The increased wind speed makes the tornado an EF-4 on the Enhanced Fujita scale. The other home that was leveled suffered damage consistent with a high end EF-3. While all walls were collapsed, there was no evidence of bolts that would have held the sill plates to the foundation. Thus, the wind speed for this particular damage is reduced slightly from the expected. The tornado was also widest in this area, reaching a maximum width of around 1300 yards or approximately 0.75 miles. As it continued to move northeastward, it continued snapping every tree near the center of its path. It also caused substantial damage to several small cinder block buildings, tore the roof off of a home and rolled a tied down single-wide manufactured home as it crossed East Sartinville Rd. From there it continued northeastward and tore the entire roof from a brick home just before moving into Lawrence County. It should be noted that from just southwest of James Ratcliff Rd through the remainder of the Walthall Co portion of the track, nearly every tree in the path of the tornado was snapped or uprooted. The tornado was responsible for two fatalities in Walthall County.

The wider storm

On April 12th 2020, a very potent storm system delivered widespread severe weather across the southeast, as a strong cold front met unstable, moist Gulf air causing severe storms across Mississippi.

Began near Enon (31.2763, -90.1732).

Source: NOAA Storm Events Database, event 887908. Narratives are written by the National Weather Service forecast office that issued the report.

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