[BNAWX] Severe Storm Outlook Narrative

[EMWIN Server]

ACUS11 KWNS 150540
SWOMCD
SPC MCD 150539
GAZ000-TNZ000-ALZ000-MSZ000-150645-

MESOSCALE DISCUSSION 0410
NWS STORM PREDICTION CENTER NORMAN OK
1239 AM CDT SAT MAR 15 2008

AREAS AFFECTED...PARTS OF NRN AL...MIDDLE TN AND NW GA

CONCERNING...SEVERE POTENTIAL...WATCH LIKELY

VALID 150539Z - 150645Z

A WW WILL BE ISSUED SHORTLY.

DOWNSTREAM OF LOW AMPLITUDE...BUT VIGOROUS SHORT WAVE IMPULSE
PROGRESSING THROUGH THE SOUTHERN PLAINS...AREA OF FOCUSED LOW-LEVEL
WARM ADVECTION CONTINUES TO DEVELOP EASTWARD TOWARD THE UPPER
TENNESSEE VALLEY.  THIS FORCING IS ACCOMPANIED BY AN EVOLVING
CONVECTIVE CLUSTER...MAINLY TO THE NORTH OF SURFACE WARM FRONT
EXTENDING ACROSS THE INTERSTATE 20 CORRIDOR.  ABOVE FRONTAL
INVERSION...STEEP LAPSE RATES ARE SUPPORTING WEAK TO MODERATE
INSTABILITY WITHIN A FAVORABLY SHEARED REGIME FOR UPDRAFT ROTATION.
LARGE HAIL MAY BE THE PRIMARY THREAT.  BUT...DRY MID-LEVELS MAY
CONTRIBUTE TO SUFFICIENT EVAPORATIVE COOLING FOR STRONG DOWNDRAFTS
WHICH COULD PENETRATE SHALLOW SURFACE INVERSION.

..KERR.. 03/15/2008

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

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

34598817 35468785 35668674 35528516 34828467 33888463
33318533 33148589 33058707 33318806 33878817

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