ZCZC SPCSWOMCD ALL
ACUS11 KWNS 040555 
SPC MCD 040555 
LAZ000-ARZ000-TXZ000-040730-

MESOSCALE DISCUSSION 0276
NWS STORM PREDICTION CENTER NORMAN OK
1255 AM CDT FRI APR 04 2014

AREAS AFFECTED...PORTIONS OF SRN AR...NRN LA...NERN TX

CONCERNING...TORNADO WATCH 56...

VALID 040555Z - 040730Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 56 CONTINUES.

SUMMARY...THE SVR RISK CONTINUES ACROSS REMAINING VALID PORTIONS OF
TORNADO WATCH 56.

DISCUSSION...CONVECTION HAS EVOLVED INTO A MATURE MCS WITH A PRIMARY
FORWARD PROPAGATIONAL COMPONENT FROM S-CNTRL AR INTO N-CNTRL LA
FEATURING 45-50 KT OF STORM MOTION. THIS COMPONENT WILL POSE THE
GREATEST POTENTIAL FOR DMGG WIND GUSTS AND PERHAPS LINE-EMBEDDED
MESOVORTICES WITH TORNADOES AS IT MOVES ACROSS ERN PARTS OF WW 56
AND INTO RECENTLY ISSUED TORNADO WATCH 58. THE DOWNSHEAR AIR MASS
REMAINS MODERATELY UNSTABLE WITH STRONG LOW-LEVEL/DEEP SHEAR.

MEANWHILE...THE MCS IS BACKBUILDING FARTHER W FROM NWRN LA INTO NERN
TX. SPORADIC DMGG WIND GUSTS WILL REMAIN POSSIBLE WITH THIS ACTIVITY
VIA CONVECTIVE MOMENTUM TRANSPORT...ESPECIALLY WITHIN SMALL BOWING
SEGMENTS...GIVEN 40 KT OF 1 KM AGL FLOW SAMPLED BY SHV VWP. THIS
ACTIVITY WILL SLOWLY EDGE SWD/SEWD AS THE 40-45 KT LLJ SUPPORTS
PROPAGATION ALONG THE SRN FLANK OF AMALGAMATING AND EXPANDING COLD
POOLS.

AREAS BEHIND THE LEADING CONVECTIVE LINE ACCOMPANYING THE MCS WILL
NO LONGER EXPERIENCE SVR POTENTIAL GIVEN ANTECEDENT OVERTURNING.

..COHEN.. 04/04/2014

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

ATTN...WFO...LZK...SHV...FWD...

LAT...LON   32509621 32629575 32949368 33549275 34049256 33429217
            32429226 31979294 31779409 31999575 32509621 

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