SPC AC 061227
   
   DAY 1 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0627 AM CST THU JAN 06 2005
   
   VALID 061300Z - 071200Z
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM MEM 45 W CBM 20 NNW
   JAN POE VCT NIR HDO ACT LIT MEM.
   
   ...NO SVR TSTM AREAS FORECAST...
   
   ...SYNOPSIS...
   PROGRESSIVE UPPER FLOW PATTERN WILL PERSIST THIS FORECAST PERIOD AS
   STRONG TROUGH OVER THE MIDDLE MS VALLEY CONTINUES ENEWD ACROSS THE
   GREAT LAKES AND INTO NEW ENGLAND TONIGHT...WHILE UPSTREAM TROUGH
   APPROACHING THE GREAT BASIN MOVES SEWD TOWARD THE CENTRAL HIGH
   PLAINS BY THE END OF THE PERIOD.  AT THE SURFACE...A LOW OVER THE
   UPPER OH VALLEY WILL MOVE NEWD THROUGH THE ST LAWRENCE RIVER
   VALLEY...WHILE TRAILING COLD FRONT MOVES ACROSS THE ERN STATES AND
   THE NRN GULF OF MEXICO.  WRN PART OF THE FRONT IS FORECAST TO BECOME
   QUASISTATIONARY DURING THE AFTERNOON OVER THE NWRN GULF BEFORE
   LIFTING SLOWLY NWWD TOWARD THE TX/LA COAST AS A WARM FRONT TONIGHT.
   
   ...ERN TX INTO LOWER MS VALLEY...
   A STRENGTHENING SSWLY LOW LEVEL JET ABOVE THE SHALLOW COOL SURFACE
   LAYER IS FORECAST TO DEVELOP BY THIS EVENING OVER SRN/ERN TX/NRN
   LA...TRANSPORTING AN ELEVATED MOIST LAYER FROM ERN TX ACROSS NRN
   LA/SRN AR INTO NRN MS. FORECAST SOUNDINGS INDICATE MARGINAL
   INSTABILITY UP TO 250 J/KG ROOTED AROUND 850 MB.  ISENTROPIC LIFT
   ALONG THE 297K THETA SURFACE COUPLED WITH DIVERGENCE ALOFT WITHIN
   RIGHT ENTRANCE REGION OF UPPER LEVEL JET AXIS THROUGH OH VALLEY WILL
   PROVIDE SUFFICIENT LARGE SCALE ASCENT FOR ELEVATED
   CONVECTION/ISOLATED THUNDERSTORMS TO DEVELOP OVER SRN/ERN TX DURING
   THE LATE AFTERNOON.  THIS ACTIVITY WILL SPREAD NEWD ACROSS PARTS OF
   NRN LA/SRN AR AND POSSIBLY NRN MS DURING THE OVERNIGHT HOURS.
   
   ..WEISS.. 01/06/2005
   
   ...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 BY 1630Z