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Mesoscale Discussion 1888
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   MESOSCALE DISCUSSION 1888
   NWS STORM PREDICTION CENTER NORMAN OK
   0207 AM CDT TUE OCT 14 2014

   AREAS AFFECTED...WRN FL PANHANDLE...ERN AL...WRN GA AND SERN TN

   CONCERNING...TORNADO WATCH 543...

   VALID 140707Z - 140830Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 543 CONTINUES.

   SUMMARY...THE THREAT FOR SPORADIC INSTANCES OF DAMAGING WIND GUSTS
   AS WELL AS A TORNADO OR TWO WILL PERSIST NEXT FEW HOURS FROM THE WRN
   AND CNTRL FL PANHANDLE NWD THROUGH EXTREME ERN AL...WRN GA AND SERN
   TN.

   DISCUSSION...EARLY THIS MORNING AN EXPANSIVE SQUALL LINE PERSISTS
   FROM THE WRN FL PANHANDLE NWD THROUGH ERN AL...NWRN GA AND SERN TN.
   THE LINE IS MOVING EAST AT AROUND 25 KT WHILE INDIVIDUAL CELLS
   WITHIN THE LINE MOVE RAPIDLY NWD. THE DOWNSTREAM ATMOSPHERE IS ONLY
   MARGINALLY UNSTABLE WITH MLCAPE FROM 1000 J/KG OVER THE FL PANHANDLE
   TO 500 J/KG FARTHER NORTH INTO NRN GA AND SERN TN. HOWEVER...SURFACE
   ANALYSIS SHOWS DEWPOINTS RISING TO NEAR 70 OVER NRN GA AS GULF
   MOISTURE IS ADVECTED NWD ALONG A STRONG SLY LLJ. FURTHER
   STRENGTHENING OF THE LLJ IS EXPECTED FROM THE OH VALLEY SWD THROUGH
   THE TN VALLEY AND GULF COASTAL STATES IN RESPONSE TO AN UPPER JET
   OVER THE LOWER MS VALLEY ROTATING THROUGH THE UPPER-TROUGH BASE.
   DESPITE THE MODEST INSTABILITY...A VERY MOIST BOUNDARY LAYER AND A
   FAVORABLE KINEMATIC ENVIRONMENT INCLUDING THE STRENGTHENING LLJ WILL
   CONTINUE TO SUPPORT POTENTIAL FOR ORGANIZED STRUCTURES IN THE LINE
   INCLUDING BOWING SEGMENTS AND MESO-VORTICES.

   SOME INCREASE IN REFLECTIVITY/ORGANIZATION HAS RECENTLY BEEN
   OBSERVED OVER EXTREME ECNTRL AL...AND IF THIS TREND CONTINUES
   ANOTHER WW MIGHT BE NEEDED ACROSS PARTS OF CNTRL/NRN GA.

   ..DIAL.. 10/14/2014


   ATTN...WFO...GSP...MRX...FFC...TAE...BMX...

   LAT...LON   30348600 31878547 33428550 34398529 35628449 35408402
               33788378 32588381 30258485 30348600 

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Page last modified: October 14, 2014
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