[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 301141
SWOMCD
SPC MCD 301141 
SCZ000-GAZ000-FLZ000-ALZ000-MSZ000-LAZ000-301315-

MESOSCALE DISCUSSION 0721
NWS STORM PREDICTION CENTER NORMAN OK
0641 AM CDT SAT APR 30 2005

AREAS AFFECTED...GA....AL....SRN MS...SERN LA...WRN FL PNHDL

CONCERNING...TORNADO WATCH 215...

VALID 301141Z - 301315Z

EXTENSIVE PRE-FRONTAL SQUALL LINE WILL CONTINUE TO MOVE EAST AT UP
TO 50KT ACROSS PORTIONS OF NRN GA...SERN AL AND PARTS OF THE FL
PNHDL THIS MORNING. FARTHER SW...FROM SRN AL ACROSS SERN LA...EWD
MOTION OF THE LINE WILL BE SLOWER. LATEST MOTION ACROSS NRN SECTIONS
OF TORNADO WATCH 215 WOULD SUGGEST THAT A NEW WATCH MAY BE NEEDED
ACROSS PARTS OF GA...SERN AL...AND PERHAPS SC...IN LESS THAN 2
HOURS.

CONVECTION HAS TAKEN ON MORE OF A LINEAR STRUCTURE OVER THE LAST
COUPLE OF HOURS AS COLD POOLS HAVE MERGED AND FORCING ALONG THE
ADVANCING FRONT REMAINS QUITE STRONG. A POSSIBLE MESOLOW HAS EVOLVED
OVER CNTRL AL NEAR THE INTERSECTION OF NRN AND SRN SQUALL LINE
SEGMENTS. NUMEROUS SMALL SCALE BOWING SEGMENTS OF CONVECTION...SOME
MOVING AT OVER 50KT...WERE EMBEDDED WITHIN THE LARGER SCALE LINES
AND ARE LIKELY PRODUCING LOCALLY DAMAGING WINDS AT THIS TIME.

LOW LEVEL SLY FLOW OF 30-50KT AHEAD OF THE FRONT AND DEVELOPING
SQUALL LINE HAS RESULTED IN STRONG MOISTURE FLUX FROM THE WRN FL
PNHDL NEWD ACROSS GA AND SC THIS MORNING. OBJECTIVE ANALYSIS FIELDS
INDICATED THAT THE PRE-CONVECTIVE AIR MASS CONTINUES TO STEADILY
DESTABILIZE AHEAD OF THE LINE. THUS...EXPECT THREAT OF DAMAGING
WINDS AND/OR A COUPLE TORNADOES TO PERSIST EWD AS STRONG LARGE SCALE
AND MESOSCALE FORCING CONTINUE TO ACT ON VERY MOIST AND MODERATELY
UNSTABLE AIR MASS.

..CARBIN.. 04/30/2005

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

ATTN...WFO...CHS...CAE...JAX...FFC...TAE...BMX...MOB...JAN...LIX...

34508481 33888408 33668146 33308108 31788242 28308749
28478950 29719064 31958796 

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