[BNAWX] Severe Storm Outlook Narrative

[EMWIN Server]

ACUS11 KWNS 122224
SWOMCD
SPC MCD 122224
GAZ000-TNZ000-ALZ000-MSZ000-ARZ000-MOZ000-130000-

MESOSCALE DISCUSSION 1081
NWS STORM PREDICTION CENTER NORMAN OK
0524 PM CDT FRI JUN 12 2009

AREAS AFFECTED...EASTERN AR AND WESTERN/MIDDLE TN AND NORTHERN
PORTIONS MS/AL INTO GA

CONCERNING...SEVERE THUNDERSTORM WATCH 388...389...

VALID 122224Z - 130000Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
388...389...CONTINUES.

PDS SEVERE TSTM WATCH 388 CONTINUES UNTIL 00Z AND SEVERE TSTM WATCH
389 CONTINUES UNTIL 03Z ACROSS NORTHERN AL. ADJACENT TO THESE
EXISTING WATCHES...PORTIONS OF MIDDLE TN AND NORTHERN GA WILL BE
MONITORED FOR ADDITIONAL WATCHES THIS EVENING.

DERECHO PRODUCING BOW ECHO CONTINUES TO RACE EAST-SOUTHEASTWARD INTO
SOUTHWEST TN AND NORTHERN MS AS OF 22Z WITH FORWARD PROGRESS AT
AROUND 50-55 KT. THIS SEVERE MCS/BOW ECHO WILL REMAIN CAPABLE OF
WIDESPREAD WIND DAMAGE OVER THE NEXT SEVERAL HOURS...AS IT
CONTINUALLY ENGULFS LEADING QUASI-DISCRETE SEVERE CONVECTION
/CAPABLE OF HAIL AND DAMAGING WINDS/ ACROSS NORTHEAST MS/NORTHERN AL
ALONG A WNW-ESE ORIENTED LOW LEVEL BAROCLINIC ZONE. A 46 KT WIND
GUST WAS RECENTLY MEASURED AT MEMPHIS AS OF 2146Z. A STRONG SURFACE
COLD POOL AND A 50-65 KT REAR INFLOW JET /AROUND 2-3 KM AND ABOVE
PER LITTLE ROCK WSR-88D VWP DATA/...ALONG WITH A MODERATELY UNSTABLE
PRE-MCS AIRMASS WITH 2000-3500 J PER KG MLCAPE...WILL SUPPORT MCS
MAINTENENCE WITH WIDESPREAD DAMAGING WIND POTENTIAL CONTINUING
ACROSS NORTHERN PORTIONS OF MS/AL AND SOUTHERN TN. IN ADDITION...A
TORNADO OR TWO CANNOT BE RULED OUT...MAINLY WITH NORTHERN PERIPHERY
EMBEDDED CIRCULATIONS. OTHERWISE...EVEN IN THE WAKE OF THE SEVERE
MCS...ISOLATED SEVERE REDEVELOPMENT /MAINLY HAIL/ CANNOT BE RULED
OUT ALONG THE TRAILING OUTFLOW BOUNDARY ACROSS SOUTHERN AR AMIDST A
WEAK ISENTROPIC LIFT REGIME ALONG/ATOP THE BOUNDARY/COLD POOL.

..GUYER.. 06/12/2009

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

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

LAT...LON   36049098 35948939 35428724 34838428 33728344 32618442
            32618722 32778865 33469218 34969112 36049098

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