[MCD] SWOMCD

Tue Nov 29 01:51:55 UTC 2005

ACUS11 KWNS 290149
SWOMCD
SPC MCD 290149 
GAZ000-ALZ000-290315-

MESOSCALE DISCUSSION 2504
NWS STORM PREDICTION CENTER NORMAN OK
0749 PM CST MON NOV 28 2005

AREAS AFFECTED...SRN AND ERN AL THROUGH EXTREME WRN GA

CONCERNING...TORNADO WATCH 886...

VALID 290149Z - 290315Z

THREAT FOR ISOLATED TORNADOES IS EXPECTED TO PERSIST NEXT 2-3 HOURS
MAINLY FROM S CNTRL THROUGH E CNTRL AL. A MORE LIMITED THREAT MAY
SPREAD INTO EXTREME WRN GA AFTER 02Z. CONVECTIVE TRENDS WILL
CONTINUE TO BE MONITORED FOR A POSSIBLE WW IN WRN GA AS STORMS
APPROACH THE ERN EDGE OF WW 886.

A LINE OF SEVERE STORMS CONTAINING DISCRETE SUPERCELLS EXTENDS FROM
JUST E OF CLEBURNE COUNTY IN ERN AL SWWD TO MONROE COUNTY IN SRN AL.
THE LINE CONTINUES SLOWLY EWD WHILE THE INDIVIDUAL CELLS MOVE NEWD
AT AROUND 35 KT. STORMS ARE DEVELOPING JUST AHEAD OF A COLD FRONT
THAT EXTENDS FROM THE TN VALLEY SWWD THROUGH CNTRL AND SWRN AL. THE
ATMOSPHERE E OF THIS BOUNDARY REMAINS MARGINALLY UNSTABLE IN A
NARROW AXIS FROM SRN THROUGH E CNTRL AL...AND STORMS ARE CURRENTLY
MOVING THROUGH THE AXIS OF MAXIMUM INSTABILITY. A SECONDARY BOUNDARY
EXTENDS FROM THE FL PANHANDLE NWWD THROUGH S CNTRL AL WHERE IT
INTERSECTS THE COLD FRONT. TRENDS HAVE BEEN FOR LOW LEVEL
MESOCYCLONE AND TORNADO POTENTIAL TO INCREASE AS STORMS MOVE NEWD
AND CROSS THIS BOUNDARY WHERE LOW LEVEL SHEAR AND HELICITY ARE
ENHANCED. THREAT FOR ISOLATED TORNADOES IS EXPECTED TO CONTINUE NEXT
FEW HOURS...MAINLY FROM S CNTRL THROUGH ERN AL. INSTABILITY BECOMES
MORE MARGINAL AND ELEVATED FARTHER EAST INTO GA...AND THIS COULD
SERVE TO LIMIT THE EWD PROGRESSION OF THE TORNADO THREAT.

..DIAL.. 11/29/2005

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...FFC...TAE...BMX...MOB...

31408584 31908703 33408607 33688521 33058491 

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