This was an unseasonable tornado outbreak for southeast Tennessee. A strong upper-level jet moved across the western Tennessee and Ohio Valleys and provided a spring-like kinematic and thermodynamic profile across the southern Tennessee Valley. The potential for significant severe weather was well understood by forecasters across the northern Gulf Coast states, but was not expected to reach northward into southeast Tennessee. The strength of the upper-level jet and the enhanced low-level boundary jet allowed a warm front to move north, bringing unseasonably warm and unstable air to the CWA, and provided a mesoscale focus for enhanced tornadogenesis.
This presentation will focus on the overall synoptic, mesoscale, and environmental evolution of this significant tornado outbreak and provide a radar review of the three strong supercells. Since the tornado outbreak was not well forecast, a thorough understanding of the evolution of this event will aid forecasters for similar systems.