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Mesoscale Discussion 700
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   MESOSCALE DISCUSSION 0700
   NWS STORM PREDICTION CENTER NORMAN OK
   0351 PM CDT TUE MAY 19 2015

   AREAS AFFECTED...NWRN TX THROUGH SWRN AND SCNTRL OK

   CONCERNING...TORNADO WATCH 189...

   VALID 192051Z - 192245Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 189 CONTINUES.

   SUMMARY...THREAT FOR A FEW TORNADOES...DAMAGING WIND AND HAIL WILL
   PERSIST THROUGH EARLY EVENING FROM NWRN TX THROUGH SWRN AND SCNTRL
   OK.

   DISCUSSION...NUMEROUS STORMS CONTINUE DEVELOPING IN WARM SECTOR OVER
   NWRN TX AND NWD ALONG E-W ORIENTED QUASI-STATIONARY BOUNDARY LOCATED
   OVER SRN OK. THOUGH MID-LEVEL LAPSE RATES ARE WEAK...RICH LOW-LEVEL
   MOISTURE AND POCKETS OF DIABATIC WARMING HAVE RESULTED IN 1000-1500
   J/KG MLCAPE. ENVIRONMENT REMAINS FAVORABLE FOR LOW-LEVEL
   MESOCYCLONES AND TORNADOES OVER THIS REGION WHERE NEAR-SFC WINDS ARE
   BACKED TO SELY NEAR AND SOUTH OF THE BOUNDARY AND ALONG 40 KT SLY
   LLJ AXIS SUPPORTING 0-1 KM STORM RELATIVE HELICITY FROM 200-300
   M2/S2 BASED ON OBSERVED STORM MOTIONS.

   ..DIAL.. 05/19/2015


   ATTN...WFO...FWD...OUN...SJT...

   LAT...LON   33709687 33379899 34279982 35109888 35239656 33709687 

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Page last modified: May 19, 2015
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