[BNAWX] Severe Storm Outlook Narrative

[EMWIN Server]

ACUS11 KWNS 271849
SWOMCD
SPC MCD 271849
INZ000-KYZ000-ILZ000-TNZ000-MOZ000-ARZ000-272045-

MESOSCALE DISCUSSION 0879
NWS STORM PREDICTION CENTER NORMAN OK
0149 PM CDT WED MAY 27 2009

AREAS AFFECTED...NERN AR...SERN MO...WRN TN...SRN IL...WRN KY...SRN
IND

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 271849Z - 272045Z

CONVECTION IS BEGINNING TO DEEPEN/INTENSIFY ACROSS PORTIONS OF THE
MID MS VALLEY...ESPECIALLY FROM SERN MO INTO SRN IL.  THIS ACTIVITY
IS EVOLVING WITHIN A VERY BUOYANT AIRMASS CHARACTERIZED BY STEEP LOW
LEVEL LAPSE RATES...ON THE ORDER OF 8 C/KM IN THE LOWEST 3KM...AND
MLCAPE VALUES OF ROUGHLY 2500 J/KG.  LATEST VIS IMAGERY AND LONGER
RADAR LOOPS SUGGEST TWO REMNANT MCS VORT CENTERS ARE LOCATED JUST NW
OF SGF AND NEAR LIT.  WITH BOUNDARY LAYER EXPECTED TO FURTHER
DESTABILIZE IT APPEARS A RATHER BROAD SWATH OF ENHANCED THUNDERSTORM
ACTIVITY WILL EVOLVE FROM NERN AR...NEWD INTO PORTIONS OF SRN
IL/IND...PARTLY DRIVEN BY AFOREMENTIONED UPPER VORT MAXIMA...BUT IN
LARGE PART BY AFTERNOON HEATING.  GIVEN THE WEAK SHEAR ENVIRONMENT
IT APPEARS DOWNBURSTS OR PERHAPS SOME HAIL MAY ACCOMPANY THE
STRONGEST ACTIVITY.  WILL CONTINUE TO MONITOR THIS REGION FOR
POSSIBLE WW.

..DARROW.. 05/27/2009

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

ATTN...WFO...LMK...OHX...IND...PAH...ILX...MEG...LSX...LZK...
SGF...

LAT...LON   35658876 35159128 36759220 38588895 40268709 39198585
            35658876



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