SPC AC 170508
   
   DAY 1 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   1108 PM CST TUE DEC 16 2003
   
   VALID 171200Z - 181200Z
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 35 SSE SRQ 10 N DAB
   ...CONT... 20 SSE CHS 40 ENE RIC 25 WSW EEN 25 ENE PSM.
   
   ...NO SVR TSTM AREAS FORECAST...
   
   ...SYNOPSIS...
   LARGE-SCALE TROUGH APPROACHING THE ERN CONUS WILL BECOME NEGATIVELY
   TILTED THIS FORECAST PERIOD IN RESPONSE TO STRONG VORTICITY CENTER
   AND ASSOCIATED MID- AND UPPER-LEVEL JET STREAKS LIFTING NEWD OUT OF
   THE TROUGH BASE AND INTO THE WRN ATLANTIC. IN THE LOW-LEVELS...
   SURFACE LOW INITIALLY OVER THE PIEDMONT REGION OF THE CAROLINAS WILL
   DEEPEN CONSIDERABLY AS IT RAPIDLY DEVELOPS NWD INTO NEW ENGLAND BY
   THIS EVENING. ATTENDANT COLD FRONT WILL SURGE SEWD ACROSS THE
   REMAINDER OF THE SERN U.S. AND FL PENINSULA BY THIS AFTERNOON. 
   
   ...ERN CAROLINAS NWD INTO SRN NEW ENGLAND...
   SHOWERS AND A FEW TSTMS WILL LIKELY BE ONGOING AT THE START OF THE
   FORECAST PERIOD WITHIN WARM CONVEYOR BELT EVOLVING OVER THE ERN
   CAROLINAS. ALTHOUGH WIND FIELDS WILL BE QUITE FAVORABLE FOR 
   ORGANIZED TSTM DEVELOPMENT...THE WEAK INSTABILITY WILL LIKELY
   PRECLUDE ANY SEVERE WEATHER POTENTIAL. THIS PRECIPITATION SHIELD
   WILL DEVELOP NWD ALONG THE ATLANTIC COAST TODAY INTO TONIGHT AS
   STRONG DYNAMIC FORCING AHEAD OF INCREASINGLY DIVERGENT UPPER TROUGH
   OVERSPREADS THE REGION. MID-LEVEL COOLING ASSOCIATED WITH THIS
   LARGE-SCALE ASCENT COUPLED WITH SLY LOW-LEVEL FLOW OFF THE GULF
   STREAM WILL CONTRIBUTE TO AN AXIS OF WEAK INSTABILITY AND THE
   POTENTIAL FOR LIGHTNING ACTIVITY ALONG AND JUST N OF MIGRATORY
   SURFACE LOW TRACK.  
   
   ...FL...
   CLUSTERS OF TSTMS SHOULD BE IN PROGRESS INITIALLY ACROSS PORTIONS OF
   THE CNTRL/SRN PENINSULA WITHIN WEAKLY UNSTABLE AIRMASS AHEAD OF
   APPROACHING COLD FRONT. POOR LAPSE RATES AND VEERED LOW-LEVEL WINDS
   SHOULD LIMIT ANY SEVERE WEATHER POTENTIAL WITH THIS ACTIVITY AS IT
   MOVES EWD OFF THE COAST BY MID AFTERNOON.
   
   ..MEAD/CROSBIE.. 12/17/2003
   
   ...NOTICE...
   FOR USERS DECODING THE POINTS PARAGRAPH HEREIN...LATITUDE AND
   LONGITUDE POINTS FOR THE CATEGORICAL AND PROBABILISTIC OUTLOOK
   GRAPHICS ALSO ARE LOCATED IN A SEPARATE PRODUCT UNDER THE WMO
   HEADINGS WUUS01 PTSDY1...WUUS02 PTSDY2...AND WUUS03 PTSDY3.  THE
   INCLUSION OF POINTS IN THIS PRODUCT WILL EVENTUALLY BE DISCONTINUED.
   
   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED FOR 1300Z