[BNAWX] Severe Storm Outlook Narrative

[EMWIN Server]

ACUS11 KWNS 151939
SWOMCD
SPC MCD 151939
GAZ000-TNZ000-ALZ000-MSZ000-152145-

MESOSCALE DISCUSSION 0423
NWS STORM PREDICTION CENTER NORMAN OK
0239 PM CDT SAT MAR 15 2008

AREAS AFFECTED...PORTIONS NRN AL...EXTREME NWRN GA...SERN TN.

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 151939Z - 152145Z

NARROW BAND OF TSTMS -- EVIDENT AT 1925Z FROM MARION/FRANKLIN
COUNTIES TN SWWD ACROSS HSV AREA TO FRANKLIN COUNTY AL -- MAY
PRODUCE SVR HAIL AND STG...POSSIBLY DAMAGING GUSTS AS IT MOVES ESEWD
ACROSS DISCUSSION AREA THROUGH 23Z.  TORNADO POTENTIAL CANNOT BE
RULED OUT WITH ANY SUSTAINED/DISCRETE TSTMS...PARTICULARLY AS THEY
APPROACH RELATIVELY FAVORABLE AIR MASS IN AND NEAR EXISTING WW 119.
ADDITIONAL ACTIVITY...IN SEPARATE AND SMALLER CONVECTIVE BAND NEAR
CBM -- ALSO MAY POSE SVR THREAT ACROSS PORTIONS NWRN AL.

FOREGOING AIR MASS CONSISTS OF MODIFIED OUTFLOW AIR FROM MORNING MCS
ACTIVITY...HEATED DIABATICALLY AND DESTABILIZING WITH SFC DEW POINTS
UPPER 50S TO LOW 60S F.  RESULTING BOUNDARY LAYER THETAE AND
COOLING ALOFT INVOF UPPER LEVEL SHORTWAVE TROUGH EACH WILL
CONTRIBUTE TO MLCAPES APCHG 1000 J/KG.  ALTHOUGH VEERED/WLY
COMPONENT OF SFC FLOW WILL KEEP VERTICAL SHEAR PROFILES WEAKER THAN
FARTHER E AND SE IN WW 119...STG DEEP-LAYER SPEED SHEAR SHOULD
PERSIST ACROSS THIS AREA AHEAD OF SFC COLD FRONT THAT IS LOCATED IN
OR JUST BEHIND CONVECTIVE BAND.  THIS WILL SUPPORT POTENTIAL FOR
SUPERCELL AND SMALL BOWING STRUCTURES.

..EDWARDS.. 03/15/2008

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

ATTN...WFO...MRX...FFC...BMX...HUN...MEG...

34398821 34578731 34958643 35178593 35188506 34968452
34528471 34188583 33938659 33418699 32948707 33118781
33278820

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