SWODY1
SPC AC 050446
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1146 PM CDT THU NOV 04 2010
VALID 051200Z - 061200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
HIGH AMPLITUDE REGIME WITH AN UPPER TROUGH OVER THE ERN U.S. AND
RIDGE IN THE WEST WILL CHARACTERIZE THE SYNOPTIC PATTERN FRIDAY. AT
THE SURFACE A LARGE AREA OF HIGH PRESSURE OVER THE CNTRL STATES WILL
MAINTAIN OFFSHORE FLOW ALONG THE GULF AND ATLANTIC COASTS.
...SRN APPALACHIANS AREA...
DESPITE MEAGER LOW-LEVEL MOISTURE RESULTING FROM OFFSHORE
FLOW...COLD AIR ALOFT WITH -30C AT 500 MB ACCOMPANYING THE UPPER
TROUGH AND DIABATIC WARMING OF THE BOUNDARY LAYER WILL CONTRIBUTE TO
A RESERVOIR OF STEEP LAPSE RATES AND WEAK INSTABILITY OVER THE SRN
APPALACHIANS AREA. UPSLOPE FLOW AND FORCING FOR ASCENT ASSOCIATED
WITH VORTICITY MAXIMA ROTATING THROUGH THE UPPER TROUGH WILL PROMOTE
THE DEVELOPMENT OF SCATTERED CONVECTION DURING THE AFTERNOON. SOME
OF THIS CONVECTION MAY EXTEND THROUGH LAYERS WHERE TEMPERATURE
PROFILES ARE SUFFICIENT FOR CHARGE SEPARATION. GIVEN THE LIMITED
INSTABILITY...COVERAGE OF THUNDERSTORMS WILL LIKELY REMAIN AOB 10%.
..DIAL/GARNER.. 11/05/2010
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