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Mesoscale Discussion 149
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   MESOSCALE DISCUSSION 0149
   NWS STORM PREDICTION CENTER NORMAN OK
   0217 AM CDT THU MAR 26 2015

   AREAS AFFECTED...SW/CNTRL AR...FAR SE OK/NE TX

   CONCERNING...SEVERE THUNDERSTORM WATCH 8...

   VALID 260717Z - 260815Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 8 CONTINUES.

   SUMMARY...ISOLATED SEVERE HAIL AND LOCALLY DAMAGING WINDS REMAIN
   POSSIBLE THROUGH SCHEDULED WW EXPIRATION OF 08Z AND MAY LINGER
   THROUGH ABOUT 10Z WHILE GRADUALLY DIMINISHING. EXTENSION OF WW IS
   POSSIBLE.

   DISCUSSION...STRONGEST CONVECTION WITHIN WW 8 WAS LOCATED OVER SCOTT
   COUNTY BORDER IN AR AND  MCCURTAIN COUNTY IN OK. 07Z SURFACE
   ANALYSIS SUGGESTS CONVECTIVE OUTFLOW IS JUST S OF KLIT/KHOT WHILE
   TRAILING SWWD TO KPRX. DESPITE LIKELY BEING ROOTED BY ELEVATED
   PARCELS...A PERSISTENT MID-LEVEL MESO HAD ACCOMPANIED THE SCOTT
   COUNTY STORM...BUT HAS SINCE WEAKENED AFTER A RECENT ONE-INCH
   DIAMETER HAIL REPORT AROUND 0645Z. THE MCCURTAIN COUNTY CLUSTER IS
   LIKELY CLOSER TO SURFACE-BASED ON THE NERN CUSP OF A PLUME OF NEAR
   60 DEG F SURFACE DEW POINTS ACROSS ERN TX. AS THIS ACTIVITY SHIFTS E
   OVER A DRIER BOUNDARY LAYER AMIDST INCREASING SBCIN AND STRONGER
   700-MB WINDS LIKELY DISPLACED N/NE...THE OVERALL SEVERE RISK SHOULD
   BECOME INCREASINGLY MARGINAL THIS MORNING.

   ..GRAMS/CORFIDI.. 03/26/2015


   ATTN...WFO...LZK...SHV...TSA...FWD...

   LAT...LON   34429452 34889365 35059277 35079220 34779215 34259238
               33469377 33169457 32969546 33189604 33479597 33929559
               34429452 

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Page last modified: March 26, 2015
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