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Mesoscale Discussion 1366
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   MESOSCALE DISCUSSION 1366
   NWS STORM PREDICTION CENTER NORMAN OK
   0312 PM CDT SAT JUL 11 2015

   AREAS AFFECTED...PART OF NORTHWEST GA INCLUDING THE ATLANTA METRO
   AREA

   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 

   VALID 112012Z - 112215Z

   PROBABILITY OF WATCH ISSUANCE...5 PERCENT

   SUMMARY...ISOLATED STRONG WIND GUSTS AND SMALL HAIL WILL BE POSSIBLE
   THROUGH THE LATE AFTERNOON TO EARLY EVENING AS A CLUSTER OF STORMS
   MOVES TO THE SOUTH/SOUTHEAST THROUGH NORTHWEST GA AND AFFECTING
   AREAS INCLUDING THE ATLANTA METRO AREA.

   DISCUSSION...A CLUSTER OF STORMS THAT MOVED INTO NORTHWEST GA FROM
   SOUTHEAST TN APPEARS TO BE ATTENDANT TO FORCING FOR ASCENT WITH A
   LOW-AMPLITUDE MIDLEVEL IMPULSE EVIDENT IN WATER VAPOR IMAGERY MOVING
   INTO NORTHWEST GA.  THIS MIDLEVEL FEATURE WILL PROGRESS TO THE
   SOUTH/SOUTHEAST WITH THE CLUSTER OF STORMS APPROACHING AN
   ENVIRONMENT THAT IS MODERATELY UNSTABLE /MLCAPE AROUND 2000 J PER
   KG/.  BULK SHEAR IS WEAK.  HOWEVER...SOME COLD POOL ENHANCEMENT TO
   THE SOUTHWARD MOVEMENT OF THESE STORMS AND RAP-BASED DCAPE EXCEEDING
   1000 J/KG IN THE DISCUSSION AREA ALONG WITH STEEP LOW-LEVEL LAPSE
   RATES /ESPECIALLY FROM ATL/AHN SWD/ SUGGEST THERE COULD BE AN
   INCREASED THREAT FOR LOCALLY STRONG WIND GUSTS.

   ..PETERS/HART.. 07/11/2015


   ATTN...WFO...FFC...

   LAT...LON   34568479 34478422 34348389 33638379 33338398 33238445
               33388478 33958503 34268518 34498515 34568479 

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Page last modified: July 11, 2015
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