SWODY1
SPC AC 271921
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0121 PM CST SAT NOV 27 2010
VALID 272000Z - 281200Z
...NO SVR TSTM AREAS FORECAST...
DAY 1 OUTLOOK REMAINS ON TRACK PER EARLIER FORECASTS. NO CHANGES
NEEDED.
..PETERS.. 11/27/2010
.PREV DISCUSSION... /ISSUED 1015 AM CST SAT NOV 27 2010/
...PACIFIC NW COAST INTO THE CA CNTRL VALLEY...
A STRONG SHORT WAVE TROUGH AND ASSOCIATED MIDDLE AND UPPER-LEVEL
JETSTREAKS NOW OFF THE PACIFIC NW AND NRN CA COASTS WILL DIG SEWD
INTO THE GREAT BASIN AND LOWER CO VALLEY BY SUNDAY MORNING. DYNAMIC
FORCING FOR ASCENT AND RESULTANT STEEPENING MIDLEVEL LAPSE RATES
WILL SUPPORT WEAK CONVECTIVE INSTABILITY AND THE POTENTIAL FOR
LOW-TOPPED TSTM DEVELOPMENT ALONG SYSTEM TRACK TODAY INTO TONIGHT.
...SRN FL PENINSULA...
SURFACE COLD FRONT OVER THE CNTRL PENINSULA WILL CONTINUE SWD
TODAY...ENHANCING CONVECTIVE DEVELOPMENT THROUGH THE DIURNAL HEATING
CYCLE. WHILE AMBIENT WARM SECTOR IS WARM AND QUITE MOIST...12Z
OBSERVED SOUNDINGS AND FORECAST DATA SUGGEST THAT POOR MIDLEVEL
LAPSE RATES WILL LIMIT THE DEPTH OF DEVELOPING UPDRAFTS. ISOLATED
LIGHTNING WILL BE POSSIBLE WITH THE DEEPEST CONVECTIVE ELEMENTS THIS
AFTERNOON...THOUGH THIS POTENTIAL APPEARS TOO MARGINAL TO WARRANT
INCLUSION OF A GENERAL TSTM AREA.
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