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Mesoscale Discussion 479
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   MESOSCALE DISCUSSION 0479
   NWS STORM PREDICTION CENTER NORMAN OK
   0704 PM CDT MON APR 15 2013
   
   AREAS AFFECTED...NWRN AR...SRN/ERN OK...N-CNTRL TX
   
   CONCERNING...TORNADO WATCH 108...
   
   VALID 160004Z - 160045Z
   
   CORRECTED FOR INCORRECT WATCH REFERENCE
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 108 CONTINUES.
   
   SUMMARY...SVR TSTMS CURRENTLY ONGOING ACROSS PORTIONS OF N-CNTRL TX
   ARE EXPECTED TO PERSIST FOR THE NEXT FEW HOURS BEFORE THE LOSS OF
   HEATING AND INCREASING CINH SLOWLY DIMINISHES THEIR STRENGTH. SOME
   ADDITIONAL DEVELOPMENT IS POSSIBLE ACROSS THE WATCH AREA BUT OVERALL
   COVERAGE SHOULD REMAIN ISOLATED.
   
   DISCUSSION...TSTMS INITIATED NEAR THE TRIPLE POINT /CURRENTLY OVER
   SRN YOUNG COUNTY PER KDYX RADAR IMAGERY/ AND PROGRESSED EWD INTO AN
   UNSTABLE AIRMASS. SUPERCELL WITH A HISTORY OF PRODUCING SVR HAIL HAS
   DISSIPATED...LIKELY A RESULT OF INCREASING CINH ACROSS THE ERN
   PORTIONS OF THE WATCH /WHERE THE BOUNDARY LAYER IS NOT AS DEEPLY
   MIXED/. ADDITIONAL DEVELOPMENT ALONG THE OUTFLOW BOUNDARY OF THIS
   SUPERCELL CONTINUES TO SUPPORT STRONG TO SVR STORMS ACROSS
   JACK...CLAY...MONTAGUE...AND COOKE COUNTIES. THESE STORMS WILL
   LIKELY FOLLOW A SIMILAR DIMINISHING TREND TO THE EARLIER SUPERCELL
   AS THEY MOVE EWD.
   
   MULTIPLE BOUNDARIES ARE VISIBLE ON KTLX RADAR WITH SOME ATTEMPTS AT
   CONVECTIVE INITIATION. EARLIER UPDRAFT ACROSS POTTAWATOMIE COUNTY
   HAS DISSIPATED WITH INDICATION THERE IS STILL TOO MUCH CINH. ANOTHER
   UPDRAFT IS INCREASING ACROSS THE SRN PORTION OF THE COUNTY WHERE
   RADAR IMAGERY CONFIRMS CONTINUED BOUNDARY INTERSECTION. 
   
   ADDITIONAL DEVELOPMENT REMAINS POSSIBLE...PARTICULARLY ALONG
   BOUNDARY INTERSECTIONS...BUT MESOANALYSIS REVEALS MLCINH ACROSS MUCH
   OF THE WATCH AREA AND OVERALL TSTM COVERAGE WILL BE LIMITED.
   
   ..MOSIER.. 04/16/2013
   
   
   ATTN...WFO...TSA...FWD...OUN...SJT...
   
   LAT...LON   32509927 36459600 36459351 32479687 32509927 
   
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