SWOMCD
SPC MCD 202351
ALZ000-MSZ000-210115-
MESOSCALE DISCUSSION 0497
NWS STORM PREDICTION CENTER NORMAN OK
0651 PM CDT WED APR 20 2011
AREAS AFFECTED...NRN MS INTO NRN AL
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 202351Z - 210115Z
A NEW WW COULD BE REQUIRED OVER MUCH OF NRN MS INTO CNTRL/NRN AL FOR
HAIL...BUT ALSO FOR A POTENTIAL WIND THREAT DEVELOPING.
LATEST RADAR SHOWS STORMS JUST CROSSING THE MS RIVER CONGEALING INTO
A LINEAR STRUCTURE...WHILE A GENERAL INCREASE IN ISOLATED STORMS
CONTAINING HAIL WAS ALSO OCCURRING TO THE E. AT LEAST ISOLATED HAIL
IS EXPECTED TO AFFECT PORTIONS OF NRN AL AS THE ACTIVITY MOVES
SLOWLY EWD OUT OF MS. HOWEVER...THERE IS CONCERN A WIND THREAT MAY
BE DEVELOPING OUT OF THE ACTIVITY OVER NWRN MS AND EVENTUALLY N
CNTRL/NRN AL. THESE STORMS WILL TRAVEL SEWD ALONG THE
BOUNDARY/INSTABILITY GRADIENT. GIVEN SUFFICIENTLY STRONG FLOW ALOFT
AND DEEP LAYER SHEAR...A NEW WW FOR WIND AND HAIL COULD BE NEEDED IF
THE SYSTEM STRENGTHENS FURTHER AND PERSISTS.
..JEWELL.. 04/20/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...BMX...HUN...MEG...JAN...
LAT...LON 33279089 34229020 34518915 34328763 33978696 33378691
32798763 32798823 33028933 33079008 33279089
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