SWODY1
SPC AC 170047
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0747 PM CDT TUE SEP 16 2008
VALID 170100Z - 171200Z
...NO SVR TSTM AREAS FORECAST...
...SERN CONUS...
EARLY EVENING SURFACE ANALYSIS SHOWED A BOUNDARY EXTENDING EWD FROM
CENTRAL GA THROUGH FAR SRN SC AND THEN NEWD OFF THE SC/NC COAST. A
SECOND BOUNDARY EXTENDED FROM OFF THE SC COAST SWWD TO NWRN FL. THE
FORMER BOUNDARY WILL CONTINUE TO MOVE SWD OVERNIGHT REACHING THE GA/
FL BORDER BY 12Z WEDNESDAY. BOUNDARY LAYER STABILIZATION WITH THE
LOSS OF DAY TIME HEATING COMBINED WITH THE CONVECTIVELY ACTIVE PART
OF THE SC/GA BOUNDARY CONTINUING TO MOVE OFFSHORE THIS EVENING
SHOULD LIMIT THE POTENTIAL FOR ADDITIONAL STRONG TO SEVERE STORMS
OVER LAND.
...WRN CONUS...
DIURNALLY DRIVEN ACTIVITY OVER THE SWRN STATES IS EXPECTED TO
DECREASE IN AREAL COVERAGE THIS EVENING AS THE BOUNDARY LAYER
STABILIZES WITH THE LOSS OF DAY TIME HEATING. FARTHER NW...TSTM
CHANCES MAY PERSIST BEYOND SUNSET AS STRONGER FORCING FOR ASCENT
AHEAD OF PACIFIC SHORT WAVE TROUGH SPREADS NNEWD ACROSS NRN CA/WRN
ORE. 00Z MFR SOUNDING INDICATED A DEEP WELL MIXED BOUNDARY LAYER
AND MARGINAL INSTABILITY SUPPORTING THIS TSTM THREAT.
..PETERS.. 09/17/2008
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