SPC Mesoscale Discussion: Severe Thunderstorm Watch 579…

| August 13, 2019 @ 6:56 pm

SUMMARY…An isolated severe threat will gradually shift southward across the discussion area through the early evening. The probability of a new Severe Thunderstorm Watch issuance for portions of the discussion area is 20%.

DISCUSSION…Scattered clusters of storms continue to persist across the remaining valid portions of WW 579, with other marginally severe convection in eastern Arkansas. More recently, scattered storms have begun to develop across western Tennessee between these two clusters of storms along a slowly southward-moving front across the area. These storms are in a weakly sheared, yet strongly unstable environment, which should continue to support isolated instances of gusty winds and marginally severe hail. Storms have drifted southward across the discussion area and should continue to do so through slightly after dusk, when nocturnal boundary layer cooling results in a decrease in overall updraft intensity. Furthermore, western Tennessee convection may continue to expand and grow upscale with time, posing a wind/hail risk into northern Mississippi over the next couple hours. On the whole, these convective trends will probably not necessitate a new WW issuance.


Category: ALL POSTS, MescoScale Discussions

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