Mesoscale Discussion 0993 NWS Storm Prediction Center Norman OK 0622 PM CDT Sun May 26 2024 Areas affected...Eastern OH...western PA...western MD...eastern WV...central VA Concerning...Severe Thunderstorm Watch 317...318...321... Valid 262322Z - 270045Z The severe weather threat for Severe Thunderstorm Watch 317, 318, 321 continues. SUMMARY...Some damaging-wind potential will spread northeastward through the evening. DISCUSSION...A loosely organized QLCS with a history of producing some wind damage is moving across eastern OH/western PA into parts of eastern WV/central VA. While midlevel lapse rates are weak and instability gradually decreases with eastward extent, earlier diurnal heating resulted in some steepening of low-level lapse rates, and MLCAPE may remain around 500 J/kg in advance of the line this evening, though with gradually increasing MLCINH. The QLCS will likely continue to remain somewhat organized until decreasing instability and increasing inhibition becomes prohibitive later this evening. Rather strong low-level flow (noted on regional VWPs) will continue to support some wind-damage potential with this QLCS as it advances northeastward. Some threat may eventually spread out of WW 318 and WW 321 into central PA, western MD, and northern/central VA, though the need for additional watch issuance remains uncertain. ..Dean/Smith.. 05/26/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...AKQ...CTP...LWX...RNK...PBZ...RLX...CLE... LAT...LON 37287955 39128015 40948107 41138111 41618053 41427948 39667867 37617818 37257851 37247927 37287955