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Mesoscale Discussion #0422 issued at 1913 UTC 15 March 2008
MESOSCALE DISCUSSION 0422
   NWS STORM PREDICTION CENTER NORMAN OK
   0213 PM CDT SAT MAR 15 2008
   
   AREAS AFFECTED...PARTS OF N-CENTRAL/NWRN GA...SMALL PART OF NERN AL
   -- WRN/CENTRAL SUBSET OF WW 119.
   
   CONCERNING...TORNADO WATCH 119...
   
   VALID 151913Z - 152015Z
   
   CORRECTED FOR EXTRANEOUS STATE ABBREVATION
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 119 CONTINUES.
   
   AS ADJOINING WARM SECTOR CONTINUES TO HEAT/DESTABILIZE
   GRADUALLY...CONVECTION IS BUILDING AND BECOMING SVR INVOF AL/GA
   STATE LINE...ALONG WRN SEGMENT OF COMBINED SFC WARM FRONT AND
   OUTFLOW BOUNDARY.  SFC WINDS IN WARM SECTOR HAVE VEERED IN RESPONSE
   TO EWD SHIFT OF STRONGEST ISALLOBARIC FORCING ASSOCIATED WITH NERN
   GA TORNADIC STORM...AND ASSOCIATED MESOCIRCULATION.  HOWEVER...BULK
   SHEAR ACROSS N-CENTRAL/NWRN GA WILL REMAIN FAVORABLE -- E.G. ROUGHLY
   60 KT EFFECTIVE SHEAR MAGNITUDE FROM FFC RAOB AND RUC
   SOUNDINGS...AND 0-1 KM SRH STILL EXCEEDING 200 J/KG BASED ON VWP AND
   RAOB DATA.  MODIFIED 18Z FFC RAOB INDICATES THAT SFC TEMPS LOW-MID
   70S F AND DEW POINTS LOW 60S SUPPORT MLCAPES 1000-1500 J/KG AND VERY
   WEAK CINH.  STRENGTHENING SUPERCELLS OVER CALHOUN/CLEBURNE COUNTIES
   AL AT 19Z ARE MOVING ENE 40-45 KT.  ASSOCIATED RISK OF DAMAGING
   HAIL/WIND AND POSSIBLY TORNADOES COULD AFFECT ATL METRO AREA DURING
   20-21Z TIME FRAME THEN ENEWD TOWARD AREAS NEAR AND JUST N AHN IN
   ENSUING 1-2 HOURS.
   
   ..EDWARDS.. 03/15/2008
   
   
   ATTN...WFO...GSP...FFC...BMX...



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