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Mesoscale Discussion 545
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   MESOSCALE DISCUSSION 0545
   NWS STORM PREDICTION CENTER NORMAN OK
   0212 PM CDT FRI MAY 08 2015

   AREAS AFFECTED...SOUTHWEST/SOUTH-CENTRAL OK AND WESTERN NORTH TX

   CONCERNING...TORNADO WATCH 143...

   VALID 081912Z - 082045Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 143 CONTINUES.

   SUMMARY...MAINLY A LARGE HAIL/DAMAGING WIND THREAT WILL CONTINUE TO
   SPREAD EAST-NORTHEASTWARD ACROSS SOUTHWEST/SOUTH-CENTRAL OK THROUGH
   MID-AFTERNOON...WHILE STORMS ARE LIKELY TO ALSO INCREASE LATER THIS
   AFTERNOON ACROSS ADDITIONAL PORTIONS OF WESTERN NORTH TX/IMMEDIATE
   RED RIVER VICINITY OF OK WITH ALL SEVERE HAZARDS POSSIBLE. TORNADO
   WATCH 143 CONTINUES UNTIL 02Z. AN ADDITIONAL WATCH COULD BE NEEDED
   LATER THIS AFTERNOON FOR MORE OF EAST-CENTRAL/SOUTHEAST OK.

   DISCUSSION...MULTIPLE SEVERE CLUSTERS/HIGH PRECIP SUPERCELLS WITH
   HISTORY OF LARGE HAIL /INCLUDING RECENT TENNIS BALL SIZE HAIL
   REPORTS/ WILL CONTINUE TO SPREAD EAST-NORTHEASTWARD ACROSS SOUTHWEST
   INTO SOUTH-CENTRAL OK...LIKELY FAVORING A SOUTHWEST-NORTHEAST
   ORIENTED FRONTAL BOUNDARY THAT EXTENDS TOWARD THE OKC METRO AREA.
   LARGE HAIL WILL REMAIN A DISTINCT POSSIBILITY...AND LOCALLY DAMAGING
   WINDS AND POSSIBLY SOME TORNADO RISK SHOULD BECOME AN INCREASING
   CONCERN AS CLOUDS CONTINUE TO THIN/DESTABILIZATION CONTINUES TO
   OCCUR. A SPECIAL 18Z OBSERVED SOUNDING FROM NORMAN SAMPLED MORE THAN
   1500 J/KG MLCAPE WITH MODESTLY STRONG/AMPLE TURNING OF
   LOWER/MID-TROPOSPHERIC WINDS. 

   FARTHER SOUTH/SOUTHWEST...ADDITIONAL SEVERE DEVELOPMENT INCLUDING
   SUPERCELLS SHOULD DEVELOP INTO/ACROSS WESTERN PARTS OF NORTH TX IN
   VICINITY OF OUTFLOW IN ADDITION TO NEAR-RED RIVER PORTIONS OF OK BY
   LATE AFTERNOON.

   ..GUYER.. 05/08/2015


   ATTN...WFO...TSA...FWD...OUN...SJT...LUB...AMA...

   LAT...LON   34930027 35359870 35929685 35769614 34669599 33299682
               33009859 33509926 33809988 34490030 34930027 

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Page last modified: May 08, 2015
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