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Mesoscale Discussion 998
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   MESOSCALE DISCUSSION 0998
   NWS STORM PREDICTION CENTER NORMAN OK
   0801 PM CDT FRI JUN 12 2015

   AREAS AFFECTED...SRN TX PANHANDLE...TX S PLAINS...SW TX

   CONCERNING...TORNADO WATCH 293...

   VALID 130101Z - 130230Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 293 CONTINUES.

   SUMMARY...ALL SEVERE HAZARDS REMAIN POSSIBLE ACROSS MUCH OF TORNADO
   WATCH 293. A TRANSITION TO A MORE LINEAR MODE WILL INCREASE THE
   DAMAGING WIND THREAT WITH THE TSTM CLUSTER AROUND LBB.

   DISCUSSION...REGIONAL RADAR IMAGERY CONTINUES TO SHOW NUMEROUS
   SUPERCELLS ACROSS THE WATCH AREA WITH THE ERRATIC STORM MOTIONS
   LEADING TO MESSY CONVECTIVE EVOLUTION AND STORM INTERACTIONS.
   TRANSITION FROM A MORE CELLULAR MODE TO A LINEAR MODE OCCURRED WITH
   THE TSTM THAT MOVED THROUGH PVW AND PRODUCED 60 KNOT GUSTS AT PVW
   AND DOWNSTREAM AT THE MESONET SITE IN AIKEN. A SIMILAR TRANSITION IS
   LIKELY UNDERWAY WITH THE CLUSTER OF STORMS IN LUBBOCK AND LYNN
   COUNTIES WHERE TWO SUPERCELLS RECENTLY COLLIDED. THIS LINEAR
   TRANSITION WILL LIKELY RESULT IN SOME LOCALLY SEVERE WIND GUSTS
   WHILE LOWERING THE TORNADO POTENTIAL. ADDITIONALLY...THIS COMPLEX
   MAY EVENTUALLY MERGE WITH THE MORE LINEAR COMPLEX TO ITS NE ACROSS
   MOTLEY COUNTY IF COLD POOL AMALGAMATION IS REALIZED. WHILE THERE HAS
   BEEN SOME REDUCTION IN INSTABILITY ACROSS THE REGION...THE
   THERMODYNAMIC ENVIRONMENT DOWNSTREAM SHOULD BE SUFFICIENT FOR A
   CONTINUED SVR THREAT.

   ..MOSIER.. 06/13/2015


   ATTN...WFO...SJT...LUB...AMA...MAF...

   LAT...LON   30250402 35030242 35020014 30260182 30250402 

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Page last modified: June 13, 2015
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