843 ACUS11 KWNS 090754 SWOMCD SPC MCD 090753 SCZ000-NCZ000-TNZ000-GAZ000-090930- MESOSCALE DISCUSSION 0873 NWS STORM PREDICTION CENTER NORMAN OK 0253 AM CDT FRI MAY 09 2003 AREAS AFFECTED...NERN TN/WRN NC/NWRN SC CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 090753Z - 090930Z TSTM COMPLEX OVER FAR NERN TN WILL CONTINUE TO POSE A LARGE HAIL/DAMAGING WIND THREAT FOR THE NEXT FEW HOURS AS IS MOVES SEWD AT AROUND 30KTS. STRONG STORM /PERIODICALLY EXHIBITING SUPERCELL CHARACTERISTICS/ EMBEDDED IN SMALL CONVECTIVE COMPLEX OVER CARTER COUNTY IN FAR NERN TN HAS RECENTLY PRODUCED A 66MPH WIND GUST AT THE TRI-CITIES REGIONAL AIRPORT. IT APPEARS THAT FORCING FOR LARGE-SCALE ASCENT AHEAD OF WEAK SHORTWAVE TROUGH OVER ERN KY IN CONJUNCTION WITH LOW-LEVEL WAA ON NOSE OF SWLY LLJ JET IS SUSTAINING THIS ACTIVITY AS IT MOVES SEWD. LATEST MESOANALYSIS INDICATES THAT THIS CONVECTION HAS JUST MOVED S OF SURFACE STATIONARY FRONT WHICH EXTENDS FROM ROUGHLY ALONG THE VA/NC STATE LINE NWWD INTO ERN KY NEAR JKL. GIVEN THE STORM MOTION RELATIVELY TO THE LLJ ORIENTATION...STORM-RELATIVE INFLOW REMAINS QUITE STRONG /35-45KTS/ WHICH SHOULD CONTINUE TO SUSTAIN THE TSTMS AS THEY MOVE INTO WRN NC. RUC POINT FORECAST SOUNDINGS S OF THE FRONTAL BOUNDARY ACROSS WRN NC INTO NWRN SC INDICATE A SLIGHTLY UNSTABLE AIRMASS WITH MLCAPES OF 500-1000 J/KG. THEREFORE...IT APPEARS THAT THE THREAT OF ISOLATED WIND DAMAGE/LARGE HAIL WILL PERSIST FOR THE NEXT FEW HOURS. A WW IS BEING CONSIDERED FOR THE AREA. ..MEAD.. 05/09/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...RAH...RNK...CAE...GSP...MRX...FFC... 35408371 36048360 36508342 36588272 36558185 36258075 35598047 34658051 34138106 33978213 34458350 34798384