Administrators NorthGeorgiaWX Posted December 9, 2023 Administrators Share Posted December 9, 2023 MD 2307 CONCERNING SEVERE POTENTIAL...TORNADO WATCH LIKELY FOR PORTIONS OF EASTERN LA...CENTRAL MS...AND FAR WESTERN AL Mesoscale Discussion 2307 NWS Storm Prediction Center Norman OK 0300 PM CST Sat Dec 09 2023 Areas affected...Portions of eastern LA...central MS...and far western AL Concerning...Severe potential...Tornado Watch likely Valid 092100Z - 092300Z Probability of Watch Issuance...80 percent SUMMARY...The risk of severe storms capable of all hazards will increase during the next few hours. A Tornado Watch is likely in the next hour. DISCUSSION...Latest visible satellite imagery shows continued heating/destabilization of a moist boundary layer across portions of eastern LA into central MS -- ahead of an east-southeastward moving cold front extending from northwest MS southwestward into northern LA. Additionally, a northeast/southwest-oriented differential heating zone is evident from central MS into LA. Thunderstorm development is expected along the front during the next few hours, as midlevel height falls overspread the frontal zone amid continued warm-sector destabilization. A linear mode is expected along/immediately ahead of the front given largely front-parallel deep-layer flow/shear, with an associated severe-wind threat. However, current indications are that a weak frontal wave may develop northeastward along the frontal zone this evening, yielding a modest low-level mass response and increasing low-level hodograph size/curvature. This could promote embedded supercell structures and a tornado risk. This threat will gradually spread eastward along the cold front into the late evening hours. Additional storm development is possible ahead of the cold front in the vicinity of the differential heating boundary across central MS, and these storms would likely remain more discrete given weaker forcing. 40-50 kt of effective shear will favor supercells capable of large hail, damaging winds, and some tornado threat. Overall, confidence in the development of sustained/persistent discrete/semi-discrete supercells is low given lingering capping and the weak forcing for ascent. A Tornado Watch is likely in the next hour for much of the area. ..Weinman/Guyer.. 12/09/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...BMX...MEG...JAN...LIX...LCH...SHV... LAT...LON 30849217 30799165 30919094 31288985 31818905 32548827 33168775 33748760 34058783 34268827 34308876 34158939 33709066 32999214 32589270 32029295 31569299 31079271 30849217 Read more View the full article Quote Link to comment Share on other sites More sharing options...
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