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Start UTC Date @0z:
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171 
ACUS11 KWNS 061007
SWOMCD
SPC MCD 061006 
TNZ000-GAZ000-ALZ000-MSZ000-MOZ000-ARZ000-061300-

MESOSCALE DISCUSSION 0781
NWS STORM PREDICTION CENTER NORMAN OK
0506 AM CDT TUE MAY 06 2003

AREAS AFFECTED...PORTIONS WRN/MID TN...NRN AL...NRN MS

CONCERNING...HEAVY RAINFALL...TORNADO WATCH 262...

VALID 061006Z - 061300Z

LARGE CLUSTER OF TSTMS CONTINUES FROM MID TN AND EXTREME NRN AL
WSWWD ACROSS SWRN TN/NRN MS...WITH ADDITIONAL
DEVELOPMENT/BACKBUILDING INDICATED NWRN MS.  REGIONAL VWP/PROFILER
DATA CONTINUE TO INDICATE POTENTIAL FOR SUPERCELLS AND TORNADOES
WITH ANY STORMS THAT CAN REMAIN RELATIVELY DISCRETE -- WITH 250-450
J/KG SRH BEING COMMON IN 0-3 KM LAYER.	BOW ECHOES WITH WIND DAMAGE
POTENTIAL ALSO POSSIBLE.  EXPECT MANY CELLS N OF SRN PERIPHERY OF
CONVECTIVE BAND TO RETAIN SEVERE POTENTIAL AS THEY MOVE NEWD...OVER
COLLECTIVE OUTFLOW POOL FROM MCS.  LARGE HAIL AND OCCASIONAL
DAMAGING GUSTS POSSIBLE FROM SUCH TSTMS.  FORECAST SOUNDINGS
INDICATE 1000-1500 J/KG ELEVATED MUCAPE N OF OUTFLOW BOUNDARY IN TN
AND 1500-2000 J/KG MUCAPE OVER PORTIONS NRN MS.  

THREAT FOR HEAVY RAINFALL WILL BE MAXIMIZED WITH MERGING/TRAINING
CELLS IN THIS COMPLEX...WITH 30-40 KT LOW LEVEL SR INFLOWS INVOF LLJ
AND VERY RICH LOW LEVEL MOISTURE.  MODEL SOUNDINGS INDICATE ALMOST 2
INCH PW AND MEAN MIXING RATIOS 15-16 G/KG IN LOW LEVEL AIR MASS. 
2-3 INCH/HOUR RAIN RATES WILL BE COMMON IN TSTM CORES.

..EDWARDS.. 05/06/2003

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...MRX...FFC...OHX...BMX...HUN...MEG...MRX...OHX...HUN...MEG...

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