AREAS AFFECTED...PARTS OF NRN AL...MIDDLE TN AND NW GACONCERNING...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
No comments:
Post a Comment