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Mesoscale Discussion 530
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   MESOSCALE DISCUSSION 0530
   NWS STORM PREDICTION CENTER NORMAN OK
   0659 PM CDT WED MAY 12 2010
   
   AREAS AFFECTED...WESTERN/NORTHERN OK AND WESTERN PART OF NORTH TX TO
   SOUTHERN/EASTERN KS
   
   CONCERNING...TORNADO WATCH 155...
   
   VALID 122359Z - 130100Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 155 CONTINUES.
   
   TORNADO WATCH 155 CONTINUES UNTIL 03Z ACROSS THE WESTERN PART OF
   NORTH TX AND WESTERN/NORTHERN OK TO SOUTHERN/EASTERN KS. POTENTIAL
   CONTINUES FOR LARGE HAIL/FEW TORNADOES...WITH AN INCREASING
   POTENTIAL FOR HEAVY RAINFALL AS WELL.
   
   IT APPEARS THE RELATIVELY HIGHEST TORNADO POTENTIAL WILL CONTINUE
   ACROSS WESTERN OK OVER THE NEXT HOUR OR TWO...MAINLY 50 MILES EITHER
   SIDE OF I-40 NEAR/JUST EAST OF A DRYLINE/FRONTAL INTERSECTION.
   HERE...QUASI-DISCRETE SUPERCELLULAR STORMS SHOULD CONTINUE TO THRIVE
   WITHIN A MOIST/VERY UNSTABLE AIRMASS...WHERE MLCAPE VALUES ARE
   ESTIMATED TO BE AROUND 2500-3000 J/KG. LOW LEVEL WINDS ACROSS
   SOUTHWEST OK/ADJACENT NORTH TX HAVE BACKED MARKEDLY SOUTHEASTERLY IN
   RESPONSE TO TX PANHANDLE CYCLOGENESIS...WITH FREDERICK WSR-88D
   DERIVED VWP WINDS SUGGESTIVE OF 0-1 KM SRH IN EXCESS OF 200
   MS/S2...WHICH IS MORE THAN AMPLE FOR TORNADOES. 
   
   ELSEWHERE...SCATTERED SEVERE STORMS INCLUDING SUPERCELLS WILL
   CONTINUE ALONG THE SOUTHWEST-NORTHEASTWARD ORIENTED FRONTAL BOUNDARY
   FROM NORTHWEST OK TO THE KS TURNPIKE...WITH CONTINUED POTENTIAL FOR
   SEVERE HAIL/DAMAGING WINDS AND A TORNADO. GIVEN BOUNDARY PARALLEL
   MEAN FLOW...VERY HEAVY RAINFALL WILL ALSO BE A CONCERN.
   
   ..GUYER.. 05/12/2010
   
   
   ATTN...WFO...TSA...TOP...ICT...OUN...DDC...AMA...
   
   LAT...LON   39249677 38179558 35769760 34169971 35060004 36449981
               38539753 39249677 
   
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