[MCD] SWOMCD

[Mesoscale Convective Discussions]

ACUS11 KWNS 040800
SWOMCD
SPC MCD 040800 
GAZ000-TNZ000-ALZ000-MSZ000-040930-

MESOSCALE DISCUSSION 2524
NWS STORM PREDICTION CENTER NORMAN OK
0200 AM CST SUN DEC 04 2005

AREAS AFFECTED...NRN LA...SERN AR...N CNTRL MS...NRN AND CNTRL AL
AND SERN TN

CONCERNING...TORNADO WATCH 889...

VALID 040800Z - 040930Z

NRN PORTION OF SQUALL LINE FROM SERN TN THROUGH NERN AL IS EXPECTED
TO GRADUALLY WEAKEN AS IT MOVES INTO NWRN GA. THE SWRN TWO THIRDS OF
THE LINE SHOULD CONTINUE TO DEVELOP SEWD. CONVECTIVE TRENDS WILL BE
MONITORED FOR A POSSIBLE WW ACROSS PARTS OF CNTRL AL.

EARLY THIS MORNING A SQUALL LINE EXTENDS FROM SERN TN SWWD THROUGH
NRN AL AND FARTHER SW INTO N CNTRL MS. A WARM/WEDGE FRONT EXTENDS
FROM CNTRL GA NWWD THROUGH NERN AL WHERE IT INTERSECTS THE SQUALL
LINE. STRONGEST PORTION OF THE LINE IS CURRENTLY MOVING THROUGH NRN
AL WHERE SIGNIFICANT WIND DAMAGE HAS BEEN REPORTED. HOWEVER...NRN
THIRD OF THE LINE SHOULD WEAKEN AND BECOME MORE ELEVATED AS IT
CROSSES THE WEDGE FRONT AND MOVES OVER A MUCH MORE STABLE BOUNDARY
LAYER IN NRN GA AND SE TN WHERE TEMPERATURES ARE IN THE 40S. FARTHER
SW STORMS WILL HAVE A MUCH WIDER WARM SECTOR TO TRAVERSE.
HOWEVER...THE BOUNDARY LAYER FLOW IS EXPECTED TO GRADUALLY WEAKEN
AND VEER WITH TIME AS THE LOW LEVEL JET SHIFTS NEWD AWAY FROM THE
WARM SECTOR. THE WEAKENING AND VEERING BOUNDARY LAYER FLOW SHOULD
RESULT IN A GRADUAL DECREASE IN CONVERGENCE AND MAY SERVE AS AN
OVERALL LIMITING FACTOR FOR SEVERE WEATHER LATER THIS MORNING.
NEVERTHELESS...CONVECTIVE TRENDS WILL CONTINUE TO BE MONITORED FOR A
POSSIBLE WW OVER CNTRL AL AS STORMS APPROACH THE ERN EDGE OF WW 889.

..DIAL.. 12/04/2005

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

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

32999102 33668842 34418663 35088570 34758452 33898467
32918602 32548860 32619089 

WWWW