EF1 Tornado — Calhoun, Alabama

2011-04-27 · near Maxwellborn, Calhoun, Alabama

Event narrative

This tornado initially touched down in eastern Jefferson County, north northeast of Trussville and moved northeast through portions of St. Clair, Calhoun, Etowah and Cherokee Counties. The tornado then moved into Georgia, across Polk, Floyd and Bartow (See Storm Data Peachtree City) Counties. The tornado moved into Calhoun County for the second time, where it quickly tracked across the far northwestern corner of the county, west of Knightens Crossroads. As the tornado crossed US Hwy 278, several homes sustained significant roof damage, consistent with an EF1 rating and winds of 95 mph. Additional homes were damaged along the Calhoun/Cherokee County line. Significant tree damage was noted along this portion of the path. The tornado crossed into Cherokee County north of the intersection of US Hwy 278 and CR 19. One fatality occurred along this portion of the tornado path.

This tornado was produced by a supercell thunderstorm that began in Newton County Mississippi at 13:54 pm CST, and eventually dissipated in Macon County, North Carolina at approximately 21:18 pm CST. This supercell spawned several strong to violent tornadoes along its long path, which included another violent EF4 tornado that crossed portions of Tuscaloosa and western suburbs of the Birmingham.

Wider weather episode

A powerful storm system crossed the Southeast United States on Wednesday, April 27, 2011, resulting in a large and deadly tornado outbreak. This epic event broke the record for number of tornadoes in a day for the state of Alabama, becoming the most significant tornado outbreak in the state's history.

Central Alabama had two rounds of severe weather that day. During the early morning hours, a Quasi-Linear Convective System quickly moved across the northern half of the National Weather Service, Birmingham county warning area. Straight line winds of 90 mph (78kts) or greater and 11 tornadoes lead to widespread damage and power outages. During the afternoon, long-lived supercell thunderstorms produced long-track, strong and violent tornadoes. Destruction and loss of life across many towns and communities was devastating.

The hardest hit areas included Shottsville and Hackleburg, both in Marion County, where winds of 160 mph and 210 mph respectively, caused unimagineable damage. Cordova, in Walker County, was hit twice; by a tornado along the Quasi-Linear Convective System during the early morning hours and again in the afternoon by a long-track EF4 tornado. A long track tornado moved across the city of Tuscaloosa and the western suburbs of Birmingham, resulting in the complete destruction of whole neighborhoods and numerous injuries and fatalities in those heavily populated areas. The same parent supercell produced another violent tornado in east Central Alabama as it tracked across St. Clair and Calhoun Counties, resulting in additional fatalities and incredible damage to a number of neighborhoods. Another violent EF4 tornado tracked across portions of Elmore and Tallapoosa Counties, including Lake Martin, destroying numerous homes and a large section of a mobile home park.

Most of the violent tornadoes from this day were captured on video by a number of people, including storm spotters and chasers, as well as numerous television news crews and remotely controlled web-enabled video cameras. This allowed unprecedented coverage and viewing of this historic event in real time from people worldwide.

View location on OpenStreetMap → (33.9558, -85.7399)

Source: NOAA Storm Events Database, event_id 314923. Narrative written by the NWS forecast office that issued the report.