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Mesoscale Discussion 576
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   MESOSCALE DISCUSSION 0576
   NWS STORM PREDICTION CENTER NORMAN OK
   0801 PM CDT MON MAY 09 2016

   AREAS AFFECTED...FAR SOUTHEAST OK/FAR NORTHEAST OK TO NORTHERN
   LA/SOUTH-CENTRAL AR

   CONCERNING...TORNADO WATCH 155...157...

   VALID 100101Z - 100230Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 155...157...CONTINUES.

   SUMMARY...A SEMI-FOCUSED CORRIDOR OF LARGE HAIL/DAMAGING WIND AND
   TORNADO POTENTIAL WILL ESPECIALLY CONTINUE ACROSS FAR SOUTHEAST
   OK/FAR NORTHEAST TX INTO SOUTHWEST/SOUTH-CENTRAL AR THIS EVENING. A
   STRONG TORNADO REMAINS A POSSIBILITY. TORNADO WATCH 157 CONTINUES
   UNTIL 07Z.

   DISCUSSION...MULTIPLE NARROWLY SPACED SUPERCELLS CONTINUE TO SPREAD
   EASTWARD ACROSS SOUTHEAST OK/FAR NORTHEAST TX...NEAR PARIS TX AND
   MCCURTAIN COUNTY OK AS OF 730 PM CDT. A REGIONALLY MAXIMIZED
   CORRIDOR OF MODEST SURFACE PRESSURE FALLS ARE COLLOCATED WITH A
   DIFFERENTIAL-HEATING-BOUNDARY RELATED CORRIDOR FROM FAR NORTHEAST
   TX/FAR SOUTHEAST OK INTO SOUTH-CENTRAL/EAST-CENTRAL AR...WHERE
   STEADY DESTABILIZATION CONTINUES TO OCCUR AS PER 00Z OBSERVED
   SOUNDINGS FROM LITTLE ROCK/SHREVEPORT. A GENERAL
   EASTWARD-PERSISTENCE OF THESE ONGOING STORMS SEEMS LIKELY...WITH THE
   POSSIBILITY OF SOME ADDITIONAL PRECEDING DEVELOPMENT. EVEN IF STORMS
   TEND TO MERGE/GROW UPSCALE...THE INFLUENCE OF THE
   DIFFERENTIAL-HEATING BOUNDARY AND STRENGTHENING SOUTHERLY 2-3 KM AGL
   WINDS WILL CONTRIBUTE TO A PERSISTENT TORNADO RISK. 00Z OBSERVED
   SOUNDINGS/WSR-88D VWP DATA FROM LITTLE ROCK/SHREVEPORT SUBSTANTIATE
   200-300 M2/S2 0-1 KM SRH...WITH LOW-LEVEL SHEAR ONLY LIKELY TO
   INCREASE THIS EVENING.

   ..GUYER.. 05/10/2016


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

   LAT...LON   33599569 35279453 35879187 35119107 32819250 33079482
               33599569 

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Page last modified: May 10, 2016
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