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Mesoscale Discussion 828
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   MESOSCALE DISCUSSION 0828
   NWS STORM PREDICTION CENTER NORMAN OK
   0711 PM CDT MON MAY 27 2013

   AREAS AFFECTED...WRN/CNTRL SD

   CONCERNING...SEVERE THUNDERSTORM WATCH 227...

   VALID 280011Z - 280145Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 227
   CONTINUES.

   SUMMARY...ISOLATED SEVERE HAIL/WIND HAZARDS WILL CONTINUE NEXT FEW
   HOURS...FOCUSED ALONG THE I-90 CORRIDOR. WW 227 HAS BEEN LOCALLY
   EXTENDED TO 04Z. ADDITIONAL WW ISSUANCE IS UNLIKELY.

   DISCUSSION...PRIMARY SEVERE THREAT REMAINS ALONG SRN PORTION OF SLOW
   EWD-MOVING QLCS. RECENT INCREASE IN REFLECTIVITY WITH UPDRAFT IN
   HAAKON COUNTY HAS LIKELY BEEN A RESULT OF MERGING OUTFLOW/CONVECTION
   ORIGINALLY S/SE OF THE QLCS. WITH 30-35 KT OF MID-LEVEL SWLYS
   SAMPLED IN THE 00Z KRAP RAOB AND RESIDUAL STEEP LOW-LEVEL LAPSE
   RATES WHERE SURFACE TEMPERATURES HAD WARMED THROUGH THE
   70S...SEMI-ORGANIZED UPDRAFTS SHOULD PERSIST NEXT FEW HOURS CAPABLE
   OF ISOLATED SEVERE HAIL/WIND. WITH THE PLAINS LLJ FOCUSED INTO THE
   MCS ALONG THE S-CNTRL NEB/N-CNTRL KS BORDER...OVERALL SEVERE THREAT
   SHOULD WANE AS THE BOUNDARY LAYER COOLS THIS EVENING.

   ..GRAMS.. 05/28/2013


   ATTN...WFO...ABR...LBF...UNR...CYS...

   LAT...LON   43390370 43900346 44700247 45030165 45660061 45800022
               45739970 45259943 42910007 42820168 43020364 43390370 

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