ZCZC SPCSWOMCD ALL
ACUS11 KWNS 140212 
SPC MCD 140212 
ILZ000-TNZ000-MOZ000-ARZ000-140315-

MESOSCALE DISCUSSION 0345
NWS STORM PREDICTION CENTER NORMAN OK
0912 PM CDT SUN APR 13 2014

AREAS AFFECTED...ERN MO/WRN IL...SWD INTO NERN AR/WRN TN

CONCERNING...SEVERE THUNDERSTORM WATCH 75...

VALID 140212Z - 140315Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 75
CONTINUES.

SUMMARY...SEVERE THREAT APPEARS TO BE WANING ACROSS REMAINDER OF
WW75 AND AREAS IMMEDIATELY DOWNSTREAM.

DISCUSSION...EARLIER WELL-ORGANIZED SQUALL LINE HAS PROGRESSED
ACROSS MOST OF WW75.  MO PORTION OF FRONTAL SQUALL LINE...ROUGHLY
250 MI LONG...HAS DECREASED MARKEDLY OVER THE LAST FEW HOURS AS
CONVECTION MOVES INTO INCREASINGLY HOSTILE AIR MASS DOWNSTREAM. 
ADDITIONALLY...A BROAD CORRIDOR OF WARM-ADVECTION CONVECTION HAS
SPREAD/DEVELOPED NNEWD ACROSS ERN AR/SERN MO INTO SRN IL AND THIS
PRECIP SHIELD HAS CONTRIBUTED TO STABILIZATION JUST AHEAD OF
WEAKENING SQUALL LINE.  ALONG THE SWRN FLANK OF WARM ADVECTION
CONVECTION...A FEW ORGANIZED LINE SEGMENTS HAVE EVOLVED OVER NERN
AR.  WHILE THIS ACTIVITY MAY PRODUCE GUSTY WINDS OR SMALL-SCALE
VORTICES AS IT CROSSES THE MS RIVER INTO WRN TN THERE IS LITTLE
REASON TO BELIEVE SUFFICIENT INSTABILITY RESIDES WITHIN INFLOW
REGION OF CONVECTION TO WARRANT ORGANIZED SEVERE THREAT.

..DARROW.. 04/14/2014

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

ATTN...WFO...PAH...MEG...LSX...LZK...SGF...

LAT...LON   35019119 36579229 39479099 38878912 35678979 35019119 

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