SWOMCD
SPC MCD 231932
GAZ000-FLZ000-ALZ000-232030-
MESOSCALE DISCUSSION 0859
NWS STORM PREDICTION CENTER NORMAN OK
0232 PM CDT SAT MAY 23 2009
AREAS AFFECTED...SERN AL/FAR SWRN GA/NRN FL PANHANDLE
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 231932Z - 232030Z
OCCURRENCE OF ROTATION IN ISOLD STORMS HAS INCREASED SOMEWHAT OVER
THE PAST HOUR...AND THIS TREND WILL CONTINUE OVER THE NEXT FEW HOURS
IN A NARROW CORRIDOR...PRIMARILY NEAR THE SERN AL/SWRN GA/NRN FL
PANHANDLE BORDERS. DUE TO ISOLD AND BRIEF NATURE OF ROTATION...A WW
IS NOT ANTICIPATED.
GULF SURFACE LOW IS CURRENTLY ANALYZED IN FAR SRN MS...WITH ELY
SURFACE WINDS PREDOMINANT TO THE E OF THE LOW ACROSS PORTIONS OF
AL/GA/FL. WINDS VEER SHARPLY FROM ELY TO SLY FROM 0 TO 3000
FT...ROUGHLY IN THE LOWEST 1 KM...AS REFLECTED ON RECENT VAD WIND
PROFILE DATA IN E CNTRL AL. ENHANCED SRH IN THE LOWEST 1 KM WILL
CONTINUE TO ALLOW BRIEF ROTATION AND PERHAPS AN ISOLD TORNADO IN A
VERY MOIST/BUOYANT ENVIRONMENT. ALTHOUGH INSTABILITY IS
WEAK...RECENT RADAR TRENDS SHOW DISCRETE CELLS AND SMALL CLUSTERS OF
STORMS DEVELOPING ON THE ERN PERIPHERY OF EARLIER HEAVY RAINFALL.
STORMS THAT DEVELOP IN THESE AREAS MAY BE ABLE TO PERSIST LONGER
THAN AREAS TO THE NORTHWEST DUE TO GREATER INSTABILITY. THIS HAS
BEEN SUPPORTED BY LIGHTNING TRENDS...AS AREAS TO THE NORTH AND WEST
OF THE DISCRETE CELLS/SMALL CLUSTERS HAVE BEEN UNABLE TO PRODUCE
LIGHTNING GIVEN WEAK UPDRAFTS. REGARDLESS...ANY ROTATION WILL LIKELY
BE BRIEF...AND A WW IS NOT ANTICIPATED.
..HURLBUT.. 05/23/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...FFC...TAE...BMX...MOB...
LAT...LON 31108499 30818525 30958586 31198648 31708664 32478701
32728664 32898622 32408512 31808476 31528470 31108499
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