4/29/2023 0 Comments Dmg electrical services houston![]() ![]() Effective layer bulk shear was around 70 kts across most of the Mid-South while the effective storm-relative helicity was in the range of 300-400 m2s-2. Meanwhile, strong winds at the surface and aloft provided the wind shear necessary for organized severe weather. Mean-layer CAPE (MLCAPE) was maximized at 1500-2000 J/kg (Figure 1) at 6 PM, which was around the time that the initial supercell began to affect the Mid-South.įigure 1. The instability wasn’t extreme, but it was more than adequate to sustain strong updrafts. Temperatures warming to near 80 degrees during the afternoon hours aided instability with a strong wind field providing the vertical wind shear needed for organized thunderstorms. A strong upper-level trough was approaching from the west, providing strong lift within an unseasonably warm and unstable air mass. An ominous signal for severe weather was apparent across the Mid-South leading up to the tornadoes of December 10-11, 2021. ![]()
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