ZCZC SPCSWOMCD ALL
ACUS11 KWNS 182352 
SPC MCD 182352 
MSZ000-190115-

MESOSCALE DISCUSSION 0526
NWS STORM PREDICTION CENTER NORMAN OK
0652 PM CDT THU APR 18 2013

AREAS AFFECTED...NRN/CNTRL MS

CONCERNING...TORNADO WATCH 126...128...

VALID 182352Z - 190115Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 126...128...CONTINUES.

SUMMARY...DAMAGING WIND/TORNADO THREAT ALONG THE REMNANT PORTION OF
QLCS APPEARS TO HAVE PEAKED AND SHOULD BECOME INCREASINGLY
ISOLATED/MARGINAL THROUGH THE EVENING.

DISCUSSION...MID-LEVEL REFLECTIVITY CORES HAVE WEAKENED
SUBSTANTIALLY IN THE PAST HALF HOUR WHILE BASE REFLECTIVITY
STRUCTURES HAVE BECOME MORE ELONGATED WITHIN THE REMNANT QLCS. THESE
DIMINISHING TRENDS ARE PROBABLY A RESULT OF THE LINE CROSSING THE
INSTABILITY AXIS THAT HAD BEEN ALONG THE MS RIVER.
NEVERTHELESS...THE 00Z JAN RAOB SAMPLED A LARGE CURVING HODOGRAPH
WHICH STILL PROVIDES CONCERN FOR AT LEAST SOME SEVERE THREAT
PERSISTING...PERHAPS JUST SPATIALLY CONFINED TO THE FAR SRN PORTION
OF THE QLCS WHERE INFLOW OF WEAK BUOYANCY IS GREATEST.

..GRAMS.. 04/18/2013

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

ATTN...WFO...MEG...JAN...

LAT...LON   34268942 34198846 33618854 32718902 32398971 32389043
            33079040 33948989 34268942 

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