Why a catastrophic EF4 tornado in Mississippi fell just short of an EF5 rating.

Nature · Published 20 October 2026 · Updated 21 October 2026 Swipe more like this →

In short: On March 24, 2023, a violent multi-vortex tornado tore through Rolling Fork, Mississippi, leveling buildings and claiming 17 lives. While radar data and ground damage suggested extreme intensity, meteorologists ultimately assigned it a high-end EF4 rating. The difference between that and the highest possible classification came down to a single building.

The Rolling Fork tornado was a long-tracked, violent storm that remained on the ground for 71 minutes, covering 59.4 miles across Mississippi. It reached peak winds estimated at 195 mph, causing catastrophic destruction in Rolling Fork, Midnight, and Silver City. The storm system, which originated from a cluster of supercells in Louisiana, intensified rapidly as it crossed the Mississippi River, prompting the National Weather Service to issue a tornado emergency as it approached Rolling Fork.

The classification of the tornado as an EF4 rather than an EF5 was a subject of intense deliberation among meteorologists. The Enhanced Fujita scale is a damage-based metric, not a direct measurement of wind speed. Surveyors focused on the Green Apple Florist, a well-built brick structure that was swept clean to its concrete foundation. While this level of destruction is often representative of an EF5, experts required more consistent evidence of similar high-end damage across multiple structures to justify the highest rating. The survey team concluded that while the tornado was exceptionally close to the EF5 threshold, the available data did not provide the necessary confidence to cross it.

The impact of the tornado was profound, resulting in over 300 buildings destroyed or significantly damaged and 165 injuries. Beyond the human toll, the storm caused extensive environmental damage, including the destruction of 182 acres of forest and severe ground scouring. The event serves as a stark reminder of the limitations of damage-based scales in capturing the true intensity of violent weather, as meteorologists acknowledge that the actual wind speeds within the vortex could have potentially reached higher levels than the official assessment.

The recovery efforts were extensive, with President Joe Biden issuing a major disaster declaration to support the displaced residents of Rolling Fork and Silver City. Insured losses were estimated at nearly $100 million. Even after the tornado dissipated in Holmes County, the parent supercell continued to produce two additional deadly EF3 tornadoes, highlighting the sustained power of the atmospheric conditions that fueled the outbreak.

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