[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 300153
SWOMCD
SPC MCD 300153 
GAZ000-ALZ000-TNZ000-MSZ000-LAZ000-ARZ000-300330-

MESOSCALE DISCUSSION 0713
NWS STORM PREDICTION CENTER NORMAN OK
0853 PM CDT FRI APR 29 2005

AREAS AFFECTED...NERN LA / NRN MS / NRN AL

CONCERNING...TORNADO WATCH 211...

VALID 300153Z - 300330Z

THUNDERSTORMS CONTINUE TO INCREASE INVOF THE MS RIVER. WITH SEVERE
THREAT FORECAST TO PERSIST...WW 211 WILL LIKELY BE REPLACED WITH A
NEW WATCH ACROSS PARTS OF NERN LA...NRN MS AND EXTENDING EWD INTO
NRN AL.

SWLY LOW-LEVEL JET CONTINUES TO INTENSIFY ACROSS MS / AL INTO THE TN
VALLEY ATTM...WHICH IS LIKELY CONTRIBUTING TO AN INCREASE IN STORM
COVERAGE / INTENSITY OVER THE PAST HOUR OR SO. STORM OVER NERN
PANOLA COUNTRY MS HAS SHOWN SOME ROTATION RECENTLY...WHILE OTHER
STORMS CONTINUE TO BECOME BETTER ORGANIZED WITH TIME WITHIN BAND
EXTENDING FROM MIDDLE TN SWWD INTO NRN LA.

THOUGH INSTABILITY DECREASES WITH EWD EXTENT...FAVORABLY-SHEARED
DEEP-LAYER WIND FIELD SUPPORTIVE OF SUPERCELLS PERSISTS ACROSS THIS
REGION.  IT APPEARS ATTM THAT AIRMASS IS SUFFICIENTLY UNSTABLE AT
LEAST AS FAR E AS WRN PORTIONS OF NRN AL...SO EXPECT SEVERE THREAT
TO EXTEND E OF CURRENT WW OVER THE NEXT COUPLE OF HOURS. 
THEREFORE...WILL LIKELY REPLACE WW 211 WITH A NEW TORNADO WATCH
COVERING MUCH OF NRN MS AND NRN AL.

..GOSS.. 04/30/2005

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

ATTN...WFO...MRX...FFC...OHX...BMX...HUN...MEG...JAN...SHV...

34638996 35168558 33308529 31619246 

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