ZCZC SPCSWOMCD ALL ACUS11 KWNS 222208 SPC MCD 222208 COZ000-NMZ000-222315- Mesoscale Discussion 1201 NWS Storm Prediction Center Norman OK 0508 PM CDT Sat Jun 22 2019 Areas affected...northern/central Alabama into west-central/northwest Georgia Concerning...Severe Thunderstorm Watch 424... Valid 222208Z - 222315Z The severe weather threat for Severe Thunderstorm Watch 424 continues. SUMMARY...The greatest severe threat is confined to southern and eastern portions of WW 425. Local spatial extensions may be needed in downstream areas of east-central AL/west-central GA pending convective trends. DISCUSSION...Widespread areas of convective overturning have stabilized portions of central AL upstream of a weakly organized linear complex over Clay/Randolph/Tallapoosa counties. Ahead of this complex, strong instability persists within a weakly sheared environment, with the greatest severe threat tied to updrafts along/near the leading edge of this complex. As southeastward forward propagation continues, the storms may eventually reach the southern extent of WW 424 with some risk for damaging wind gusts. This may necessitate spatial extensions of WW 425 into Lee AL and Muscogee/Harris GA and vicinity over the next 1-2 hours. Farther west, new updrafts have been developing along and near an outflow boundary that extends westward into Tuscaloosa and Lamar counties in AL. These storms will pose a brief wind-damage threat over the next few hours. In far southern Middle Tennessee, another linear complex is organizing and moving southward into northern Alabama. While the proximity of a mid-level shortwave and moderate instability was likely supporting this development, the downstream airmass has been overturned by prior convection. An isolated severe risk will likely exist with this activity pending further organization, though this risk will likely be too low to necessitate another WW issuance. ..Cook.. 06/22/2019 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...GLD...PUB...BOU...ABQ... LAT...LON 36610398 36890487 39410499 40070454 39830323 37660303 36610398 NNNN