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Mesoscale Discussion 307
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   MESOSCALE DISCUSSION 0307
   NWS STORM PREDICTION CENTER NORMAN OK
   0132 PM CDT THU MAR 31 2016

   AREAS AFFECTED...PORTIONS OF SRN/SERN AL AND THE WRN FL PANHANDLE

   CONCERNING...TORNADO WATCH 67...

   VALID 311832Z - 311930Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 67 CONTINUES.

   SUMMARY...THE SEVERE THREAT ACROSS ERN PORTIONS OF WW 67 AND
   LOCATIONS FURTHER E WILL PROBABLY REMAIN TOO ISOLATED TO WARRANT THE
   ISSUANCE OF A NEW WW.

   DISCUSSION...A LONG-LIVED SUPERCELL WITH TRANSIENT LOW-LEVEL
   ROTATION HAS PROGRESSED EWD OVER SRN AL FOR THE PAST SEVERAL
   HOURS...PRODUCING SPORADIC HAIL/WIND REPORTS. THE AIRMASS TO THE E
   OF THIS ONGOING CONVECTION ACROSS SERN AL AND THE FAR WRN FL
   PANHANDLE IS SLIGHTLY LESS UNSTABLE COMPARED TO LOCATIONS FURTHER
   W...WITH SFC DEWPOINTS GENERALLY IN THE MID 60S...AND THE LOW-LEVEL
   WIND FIELD ALSO WEAKENS WITH EWD EXTENT PER KMOB/KEVX/KTLH VWPS. IN
   ADDITION...LARGE-SCALE FORCING ASSOCIATED WITH A SHORTWAVE TROUGH
   OVER THE TN VALLEY IS BECOMING INCREASINGLY DISPLACED FROM THE
   ONGOING THUNDERSTORMS IN SRN AL. ALL OF THESE FACTORS SUGGEST THE
   OVERALL SEVERE THREAT IN ERN PORTIONS OF WW 67 AND FURTHER E SHOULD
   REMAIN ISOLATED...AND WW 67 WILL PROBABLY BE ALLOWED TO EXPIRE AT
   19Z AS SCHEDULED.

   ..GLEASON.. 03/31/2016


   ATTN...WFO...TAE...MOB...

   LAT...LON   30958774 31378735 31438657 31348585 30958548 30298553
               30028572 30388663 30208750 30738783 30958774 

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Page last modified: March 31, 2016
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