[BNAWX] Severe Storm Outlook Narrative

[EMWIN Server]

ACUS11 KWNS 121831
SWOMCD
SPC MCD 121830
MSZ000-TNZ000-ARZ000-MOZ000-OKZ000-122000-

MESOSCALE DISCUSSION 1076
NWS STORM PREDICTION CENTER NORMAN OK
0130 PM CDT FRI JUN 12 2009

AREAS AFFECTED...AR

CONCERNING...SEVERE THUNDERSTORM WATCH 388...

VALID 121830Z - 122000Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 388
CONTINUES.

THE POTENTIAL FOR WIDESPREAD DAMAGING WINDS AND LARGE HAIL WILL
CONTINUE THIS AFTERNOON WITH BOW ECHO.

DERECHO-PRODUCING BOW ECHO CONTINUES 285-290/40-45 KT...AND AS OF
1810Z...THE LEADING EDGE OF SYSTEM WAS LOCATED FROM CARROLL AND
MADISON COUNTIES INTO LOGAN AND SCOTT COUNTIES AR.  OVER THE PAST
HOUR...A NEW PRONOUNCED REAR INFLOW NOTCH HAS BECOME ESTABLISHED
FROM CRAWFORD INTO FRANKLIN COUNTIES WITH AN ASSOCIATED DOWNSTREAM
BOWING OF LEADING CONVECTIVE LINE WHICH HAS ACCELERATED TO NEAR 50
KT.  LATEST VWP DATA FROM FT. SMITH APPEARS TO HAVE SAMPLED THE REAR
INFLOW JET WITH 50-60 KT WINDS BETWEEN 1-2 KG AGL.

DOWNSTREAM AIR MASS OVER CNTRL AR HAS WARMED THROUGH THE 80S.  WHEN
COUPLED WITH DEWPOINTS IN THE LOW/MID 70S AND STEEP MIDLEVEL LAPSE
RATES...ENVIRONMENT IS STRONGLY UNSTABLE WITH MLCAPE OF 3000-4000
J/KG.  THUS...EXPECT BOW ECHO TO CONTINUE SEWD WITH THE POTENTIAL
FOR SIGNIFICANT WIND DAMAGE REACHING LITTLE ROCK AROUND 20Z.

..MEAD.. 06/12/2009

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

ATTN...WFO...MEG...JAN...LZK...SGF...SHV...TSA...

LAT...LON   34569507 35329536 36729460 36989376 36259133 35738978
            34348968 33299064 33099191 33469336 33979432 34569507

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