[BNAWX] Severe Storm Outlook Narrative

[EMWIN Server]

ACUS11 KWNS 180038
SWOMCD
SPC MCD 180037
TNZ000-KYZ000-180130-

MESOSCALE DISCUSSION 1185
NWS STORM PREDICTION CENTER NORMAN OK
0737 PM CDT WED JUN 17 2009

AREAS AFFECTED...PARTS OF MIDDLE TN / WRN KY

CONCERNING...SEVERE THUNDERSTORM WATCH 444...

VALID 180037Z - 180130Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 444
CONTINUES.

ISOLD TORNADO POTENTIAL...IN ADDITION TO A LARGE HAIL THREAT...MAY
PERSIST FOR THE NEXT HOUR OR TWO...MAINLY ACROSS PARTS OF THE
NASHVILLE METRO AND AREAS IMMEDIATELY NW INTO MONTGOMERY COUNTY.

RADAR MOSAIC IMAGERY INDICATES A POSSIBLE/DIFFUSE OUTFLOW BOUNDARY
INTERSECTING NWWD INTO THE ONGOING SUPERCELLS IN NRN MIDDLE TN.  00Z
BNA RAOB DENOTED A VERY MOIST LOW LEVEL ENVIRONMENT WITH LCL/S AOB
1000 M...AND SURFACE TO H5 LAPSE RATES NEAR 7 DEG C / KM.  DESPITE
GENERALLY WLY LOW LEVEL FLOW VEERING TO STRONG NWLY ALOFT...BACKING
OF LOW LEVEL WINDS ON THE IMMEDIATE COOL SIDE OF THE OUTFLOW
BOUNDARY INTO STORM UPDRAFTS MAY SUPPORT AN ISOLD TORNADO RISK.
THIS WILL PROBABLY CONTINUE AS STORMS PROPAGATE ALONG AFOREMENTIONED
BOUNDARY INGESTING VERY/EXTREMELY UNSTABLE INFLOW AIRMASS.

..SMITH.. 06/18/2009

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

ATTN...WFO...LMK...OHX...PAH...

LAT...LON   35628645 36248734 36878767 37068762 36988720 36408633
            35988606 35658607 35628645



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