SPC Mesoscale Discussion: Severe Thunderstorm Watch 8… 9…

SUMMARY…The threat for tornadoes, damaging winds and isolated large hail continues across the remaining valid portions of Tornado Watches 8 and 9. In addition, a new watch may be needed across far southeast Georgia and northern Florida prior to 01Z.

DISCUSSION…Regional radar composite at 23Z shows several supercells with strong low-level rotation within the warm sector over southern sections of GA and SC and far southeast AL. In addition, areas of rotation were also noted within a line of storms along the cold front from Lee County GA to Destin FL. The immediate downstream environment will remain favorable for all severe hazards, including strong tornadoes from southern SC southwest across southern GA and northern FL, where MLCAPE averages 500 to 1000 J/KG and westerly deep shear of near 50 kts exists. Pressure falls of 2.5 to 3.5 mb/2 hours remain maximized over southern SC and east-central GA, and backed low-level winds in this region have resulted in 0-1 km SRH in excess of 350 m2/s2. Thus, a continued tornado risk will exist for the next few hours. Across portions of northern FL, storms will exit WW 8 prior to 01Z, and a local extension or a new WW will be needed. This will be coordinated with local NWS offices within the hour.

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