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Mesoscale Discussion 1485
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   MESOSCALE DISCUSSION 1485
   NWS STORM PREDICTION CENTER NORMAN OK
   0214 PM CDT SUN JUL 27 2014

   AREAS AFFECTED...CNTRL AND ERN KY...NERN TN AND EXTREME SWRN VA

   CONCERNING...TORNADO WATCH 445...

   VALID 271914Z - 272115Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 445 CONTINUES.

   SUMMARY...THREAT FOR LARGE HAIL...DAMAGING WIND AND ISOLATED
   TORNADOES WILL PERSIST OVER THE ERN TWO THIRDS OF WW 445 IN THE NEAR
   TERM INCLUDING ERN KY...NERN TN AND EXTREME WRN PORTIONS OF VA.
   ADDITIONAL STORMS MAY DEVELOP FARTHER WEST ACROSS CNTRL KY AND NRN
   MIDDLE TN LATER THIS AFTERNOON.

   DISCUSSION...ENEWD ADVECTION OF HIGHER THETA-E AIR FROM THE
   DESTABILIZING WARM SECTOR HAS RESULTED IN AN OVERALL INTENSIFICATION
   OF STORMS THAT WERE PREVIOUSLY ELEVATED. SEVERAL STORMS OVER ERN KY
   HAVE EVOLVED INTO SUPERCELLS AND ARE LIKELY INGESTING AIR FROM
   WITHIN THE BOUNDARY LAYER...ESPECIALLY OVER SERN KY WHERE
   TEMPERATURES HAVE WARMED INTO THE MID 80S. THE VWP FROM JACKSON KY
   INDICATES LARGE 0-2KM HODOGRAPHS WITH VEERING LOW-LEVEL WINDS
   INCREASING TO AROUND 60 KT AT 5 KM RESULTING IN STRONG 0-6 KM SHEAR.
   ACTIVITY SHOULD CONTINUE DEVELOPING INTO THE UNSTABLE WARM SECTOR
   ACROSS SERN KY AND EVENTUALLY NERN TN. 

   FARTHER WEST...SATELLITE IMAGERY SHOWS A BAND OF WHAT APPEARS TO BE
   STRATOCUMULUS ALONG A PRE-FRONTAL CONVERGENCE ZONE ACROSS SWRN KY
   APPROACHING THE TN BORDER. SOME SLIGHTLY DEEPER CUMULUS HAS ALSO
   BEEN OBSERVED...AND ADDITIONAL STORMS MAY DEVELOP ACROSS CNTRL KY
   AND MOVE INTO NRN MIDDLE TN. LOW-LEVEL WINDS HAVE VEERED TO WLY IN
   THIS REGION RESULTING IN SMALL 0-2 KM HODOGRAPHS...BUT EFFECTIVE
   SHEAR OF 40-50 KT REMAINS SUPPORTIVE OF SUPERCELLS.

   ..DIAL.. 07/27/2014


   ATTN...WFO...RLX...GSP...MRX...JKL...LMK...OHX...PAH...

   LAT...LON   37658559 38348439 37858266 37178203 36118213 35748403
               36208589 36388683 36848720 37278630 37658559 

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Page last modified: July 27, 2014
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