Mesoscale Discussion 2053 NWS Storm Prediction Center Norman OK 0323 PM CDT Wed Sep 11 2024 Areas affected...portions of southern and eastern Louisiana into southern Mississippi Concerning...Tornado Watch 667... Valid 112023Z - 112200Z The severe weather threat for Tornado Watch 667 continues. SUMMARY...The severe threat continues across Tornado Watch 667. A brief tornado or two cannot be ruled out over the next few hours. DISCUSSION...Multiple transient supercells, embedded within the broader rainbands associated with Hurricane Francine, have percolated in intensity and organization over the past few hours across southeast LA and adjacent areas offshore. However, a widespread and persistent rain-shield has limited diurnal heating, with surface temperatures barely exceeding the mid 70s F amid mid 70s F dewpoints. The resultant thermodynamic profiles yields scant buoyancy inland, with MLCAPE limited to 500 J/kg (perhaps less in spots), which is likely tempering tornado potential. Nonetheless, HDC VAD profiler trends show hodographs increasing in size and curvature as vertical wind fields increase in intensity with the approach of Francine's center. As such, a couple of brief tornadoes cannot be ruled out where any longer-lived, sustained supercell structure can traverse a favorable overlapping buoyancy/shear parameter space. ..Squitieri.. 09/11/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LIX...LCH... LAT...LON 29119144 29559204 29919209 30189163 30359087 30478862 30478846 30418846 30238859 29928872 29308895 28968928 28908966 28909051 29119144
Storm Prediction Center Mesoscale Discussion 2053
11
Sep