[MCD] SWOMCD

Sun Dec 4 05:41:37 UTC 2005

ACUS11 KWNS 040539
SWOMCD
SPC MCD 040538 
VAZ000-TNZ000-KYZ000-040745-

MESOSCALE DISCUSSION 2522
NWS STORM PREDICTION CENTER NORMAN OK
1138 PM CST SAT DEC 03 2005

AREAS AFFECTED...S CNTRL/SERN KY...NRN MIDDLE/NERN TN

CONCERNING...SEVERE THUNDERSTORM WATCH 888...

VALID 040538Z - 040745Z

A BAND OF STRONG/SEVERE ELEVATED THUNDERSTORMS IS MOVING RAPIDLY EWD
ACROSS NRN TN...IN ADVANCE OF A STRONG UPPER LEVEL SHORT WAVE TROUGH
MOVING ACROSS THE MIDDLE MS VALLEY.  WATER VAPOR IMAGERY SHOWS VERY
PRONOUNCED DRYING/SUBSIDENCE ADVANCING INTO THE LOWER PARTS OF THE
OHIO AND TN RIVER VALLEYS WITH LARGE SCALE ASCENT IMMEDIATELY
DOWNSTREAM OVER PARTS OF KY AND TN.  THE SYNOPTIC SCALE LIFT APPEARS
CO-LOCATED WITH ZONE OF FORCED ASCENT ALONG THE SURFACE COLD
FRONT...ENHANCING THUNDERSTORM ACTIVITY DESPITE MARGINAL ELEVATED
INSTABILITY AOB 600 J/KG PER LATEST RUC SOUNDING.  LARGE HAIL WILL
BE THE PRIMARY SEVERE THREAT WITH THE STRONGEST CELLS.

ADDITIONAL CONVECTION CONTINUES TO MOVE RAPIDLY EWD ACROSS SOUTH
CENTRAL/SERN KY WHERE LOW LEVEL WARM ADVECTION ASSOCIATED WITH THE
50-60 KT LOW LEVEL JET LOCATED ACROSS TN INTO KY.  MARGINALLY SEVERE
HAIL REMAINS POSSIBLE ACROSS THIS AREA.

..WEISS.. 12/04/2005

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

ATTN...WFO...MRX...JKL...LMK...OHX...

37358554 37448351 36008330 35838517 35858649 35898778 

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