MESOSCALE DISCUSSION 0569
   NWS STORM PREDICTION CENTER NORMAN OK
   0810 PM CDT SAT APR 27 2013
   
   AREAS AFFECTED...FAR ERN AR...SWRN TN...NRN MS
   
   CONCERNING...TORNADO WATCH 141...
   
   VALID 280110Z - 280215Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 141 CONTINUES.
   
   SUMMARY...PRIMARY THREATS WITHIN TORNADO WATCH 161 NOW APPEAR TO BE
   LARGE HAIL AND DMGG WINDS...BUT A TORNADO THREAT MAY STILL ACCOMPANY
   THE STRONGEST STORMS GIVEN SUFFICIENTLY STRONG ENVIRONMENTAL
   LOW-LEVEL SHEAR. AREAS S OF TORNADO WATCH 161 WILL BE MONITORED FOR
   TSTMS EVOLVING SEWD ACROSS THIS AREA. ADDITIONALLY...LOCAL OFFICES
   MAY CLEAR COUNTIES FROM THE WW IN THE WAKE OF A SFC LOW AND
   ATTENDANT COLD FRONT WITH CONTINUED EWD PROGRESSION.
   
   DISCUSSION...TWO PRIMARY SEMI-DISCRETE CLUSTERS ARE APPARENT IN
   LATEST RADAR IMAGES WITHIN WRN PORTIONS OF TORNADO WATCH
   161...OCCURRING INVOF A SFC LOW CENTERED NEAR MEM...AND AN ATTENDANT
   COLD FRONT EXTENDING SWD INTO S-CNTRL AR. A SUPERCELL THAT MOVED
   ACROSS E-CNTRL AR HAS TURNED RIGHT AND UNDERGONE SEVERAL
   INTERACTIONS WITH SMALL FEEDER CELLS AS IT MOVES SEWD TOWARDS NWRN
   MS...WHILE CONTINUING TO MAINTAIN PERSISTENT LOW-LEVEL ROTATION.
   ALTHOUGH THE ENVIRONMENT APPEARS SOMEWHAT LIMITING FOR TORNADO
   POTENTIAL...GIVEN THE PRESENCE OF WEAK SFC WINDS AND WIDESPREAD
   PRECIPITATION ASSOCIATED WITH MAINLY ELEVATED CONVECTION N OF THE
   WARM FRONT...A MOIST BOUNDARY LAYER AND STRONG FLOW ABOVE THE SFC
   COULD MAINTAIN TORNADIC POTENTIAL WITH DISCRETE SUPERCELLS. 
   
   WITH THE BOUNDARY LAYER RELATIVELY MOIST /DEW POINTS IN THE MID-60S
   F/...NEAR-SFC BASED PARCELS MAY BE MAINTAINED INTO THE LATE
   EVENING/OVERNIGHT...YIELDING ESTIMATED MUCAPE VALUES RANGING FROM
   750 TO 1500 J/KG. THIS COULD CONTINUE TO SUPPORT A THREAT FOR LARGE
   HAIL...AS WELL AS DMGG WINDS WITH LINE SEGMENTS THAT EVOLVE ALONG
   THE COLD FRONT.
   
   ..ROGERS/KERR.. 04/28/2013
   
   
   ATTN...WFO...OHX...HUN...MEG...JAN...LZK...
   
   LAT...LON   34058843 33568930 33439019 33609120 34239154 35689053
               35818975 35958861 35948815 35538786 34058843