SPC Mesoscale Discussion: Tornado Watch 294… 295…
SUMMARY…New WWs will be coordinated with WFOs across Tennessee, northeast AR, northern Mississippi, northern Alabama and northern Georgia to replace Tornado Watches 294 and 295.
DISCUSSION…A reservoir of very strong instability remains in place across western into middle TN to part of northern MS and northern AL with MUCAPE exceeding 3500 J/kg. Area VWP data per WSR-88Ds indicated 30-kt west-southwesterly low-level winds extended from Memphis to middle TN providing low-level ascent atop an outflow-reinforced baroclinic zone, which extended from southern KY to northern GA. Thunderstorms will continue to develop along and east of this boundary through the overnight with the available CAPE/shear parameter space favoring a continued severe-weather threat. Large hail and damaging winds will be the primary threat, as the exit region of a 60-65-kt northwesterly 500-mb jet spreads southeast into the Mid-South, Tennessee Valley, and toward the southern Appalachians overnight. Low-level SRH will remain sufficient to not rule out a tornado.
Category: ALL POSTS, MescoScale Discussions
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