[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 221544
SWOMCD
SPC MCD 221544 
ALZ000-FLZ000-MSZ000-LAZ000-221645-

MESOSCALE DISCUSSION 0339
NWS STORM PREDICTION CENTER NORMAN OK
0944 AM CST TUE MAR 22 2005

AREAS AFFECTED...FAR SERN MS/COASTAL SERN LA INTO SWRN AL/WRN FL
PANHANDLE

CONCERNING...TORNADO WATCH 63...

VALID 221544Z - 221645Z

THREAT FOR DAMAGING WINDS AND ISOLATED TORNADOES WILL CONTINUE
THROUGH 18Z ACROSS FAR SERN MS TO COASTAL SERN LA AND EWD ACROSS
SWRN AL AND THE WRN FL PANHANDLE.

REGIONAL RADARS SHOW A FAST MOVING BOW ECHO...CURRENTLY EXTENDING
N-S ALONG CENTRAL TO SRN PORTIONS OF THE MS/AL BORDER...WITH THE BOW
THEN TRAILING SWWD ACROSS SERN MS.  AIR MASS IN ADVANCE OF THIS LINE
HAS CONTINUED TO DESTABILIZE WITH MUCAPE VALUES OVER SRN AL INTO THE
WRN FL PANHANDLE RANGING FROM 1000-1500 J/KG WHERE THE WARM SECTOR
HAS MOVED INLAND WITH SURFACE DEWPOINTS IN THE LOWER-MID 60S.  

WELL ESTABLISHED COLD POOL IN THE WAKE OF THE BOW ECHO AND MODERATE
INSTABILITY DOWNSTREAM WILL CONTINUE TO SUPPORT EWD MOVEMENT OF THIS
LINE AT 35-40 KT.  PARAMETERS REMAIN FAVORABLE FOR TORNADOES WITH
ANY DISCRETE STORMS IN ADVANCE OF THE BOW ECHO AS WELL AS WITH ANY
EMBEDDED SUPERCELLS WITHIN THE LINE...GIVEN EFFECTIVE SR HELICITY
VALUES RANGING FROM 250-350 M2/S2.

..PETERS.. 03/22/2005

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

ATTN...WFO...BMX...MOB...JAN...LIX...

30229027 30748905 31848855 32418860 32418637 31018644
30148654 30068777 

WWWW