ZCZC SPCSWOMCD ALL ACUS11 KWNS 141547 SPC MCD 141547 ALZ000-MSZ000-LAZ000-141745- Mesoscale Discussion 2030 NWS Storm Prediction Center Norman OK 0947 AM CST Wed Dec 14 2022 Areas affected...South-Central/Southeast LA...Central/Southern MS...Far Southwest AL Concerning...Tornado Watch 587... Valid 141547Z - 141745Z The severe weather threat for Tornado Watch 587 continues. SUMMARY...Threat for thunderstorms capable of tornadoes will continue across southern LA, central/southern MS, and far southwest AL. DISCUSSION...Recent surface analysis places a low near HEZ in far southwest MS, A cold front extends from this low southwestward through south-central LA and a warm front extends east-southeastward from this low across southern MS and southwest AL (delineated well by the 64 deg F isodrosotherm). Recent observations show that the cold front remains progressive across southern LA into the northwest Gulf of Mexico while the portion of the front closer to the surface low is becoming less progressive. The warm front has begun lifting northward as well. Environmental conditions currently remain favorable for thunderstorms capable of tornadoes, particularly if any storms can interact with the warm front and/or undergo updraft intensification as a result of favorable cell interactions. Over the next few hours, the warm sector is expected to become increasingly favorable for discrete supercell development as the shortwave trough over TX continues quickly eastward and diurnal heating increases. The low-level flow is forecast to increase across the warm sector as well. Expectation is for the threat to trend away from the more linear/cell-in-line mode currently ongoing to a more discrete threat within the warm sector over the next several hours. A portion of this region may be upgraded to Moderate with 1630Z Outlook update. ..Mosier/Hart.. 12/14/2022 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MOB...JAN...LIX...LCH... LAT...LON 30019303 31949106 32408955 31548818 30788892 29399158 30019303 NNNN