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Mesoscale Discussion 730
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   MESOSCALE DISCUSSION 0730
   NWS STORM PREDICTION CENTER NORMAN OK
   0839 PM CDT SAT MAY 23 2015

   AREAS AFFECTED...PORTIONS OF S-CNTRL TX

   CONCERNING...TORNADO WATCH 198...

   VALID 240139Z - 240345Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 198 CONTINUES.

   SUMMARY...THREAT FOR A COUPLE OF TORNADOES AND/OR STRONG WIND GUSTS
   CONTINUES ACROSS WW 198.

   DISCUSSION...THE MOST RECENT WSR-88D/MRMS DATA ILLUSTRATE A BROKEN
   BAND OF STRONG TO SEVERE CONVECTION STRETCHING FROM LA SALLE CO NEWD
   TO TRAVIS CO. SEVERAL EMBEDDED LOW-LEVEL CIRCULATIONS AND BOWING
   SEGMENTS HAVE BEEN OBSERVED WITH THIS BAND OVER THE LAST COUPLE OF
   HOURS. INDEED...KEWX VWP DATA PRESENT FAVORABLE SHEAR NEAR THE
   SFC...WITH 0-1 KM SRH ON THE ORDER OF 200-250 M2/S2. IN COMBINATION
   WITH VERY RICH LOW-LEVEL MOISTURE /MEAN MIXING RATIO VALUES OF 15-17
   G PER KG BASED UPON OBSERVED AND FCST SOUNDINGS/ AHEAD OF THIS
   LINE...SUCH A WIND PROFILE WILL CONTINUE TO FAVOR TRANSIENT ROTATING
   STRUCTURES IN THE LOWEST LEVELS. AS SUCH...THE THREAT FOR A FEW
   TORNADOES AND/OR DAMAGING WIND GUSTS CONTINUES WITH THESE CELLS IN
   WW 198...AND WILL POTENTIALLY BE MAINTAINED BY INCREASING 850-MB
   FLOW THROUGH EARLY TONIGHT.

   ..PICCA.. 05/24/2015


   ATTN...WFO...HGX...CRP...EWX...

   LAT...LON   27799922 28239946 28729947 29579904 30679849 30819805
               30489719 30219678 29819660 28959697 27929759 27759813
               27799922 

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Page last modified: May 24, 2015
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