SPC AC 260548
   
   DAY 2 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   1148 PM CST SAT DEC 25 2004
   
   VALID 271200Z - 281200Z
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 30 SSW SFO 25 ESE MRY
   25 E SMX 20 W LAX.
   
   ...NO SVR TSTM AREAS FORECAST...
   
   ...SYNOPSIS AND FORECAST...
   AMPLIFICATION OF UPSTREAM RIDGE OVER THE GULF OF AK WILL RESULT IN A
   SWD MOVEMENT OF MID/UPPER-LEVEL LOW /CURRENTLY CENTERED NEAR
   46N/134W/ TO OFF THE CA COAST DURING THE DAY 2 PERIOD.
   MEANWHILE...DOWNSTREAM PATTERN WILL FLATTEN ACROSS THE ERN
   TWO-THIRDS OF THE NATION AS TROUGH INITIALLY OVER THE NERN STATES
   MOVES INTO THE ATLANTIC. 
   
   IN THE LOW-LEVELS...BROAD SURFACE RIDGE FROM THE GREAT LAKES INTO
   THE NRN GULF OF MEXICO WILL SLOWLY SHIFT EWD TOWARD THE ATLANTIC
   SEABOARD. IN THE W...PACIFIC COLD FRONT WILL MOVE ONTO THE CNTRL CA
   COAST DURING THE LATTER HALF OF THE FORECAST PERIOD. AS THIS
   OCCURS...ENHANCED OROGRAPHIC ASCENT IN IMMEDIATE POST-FRONTAL AIR
   MASS WILL LEAD TO AN INCREASE IN SHOWERY PRECIPITATION ALONG
   WINDWARD SIDE OF THE COASTAL RANGES. FORECAST SOUNDINGS SUGGEST THAT
   GRADUALLY STEEPENING MID-LEVEL LAPSE RATES OWING TO CLOSE PROXIMITY
   OF MID-LEVEL COLD POOL MAY RESULT IN SOME WEAK INSTABILITY AND
   POTENTIAL FOR A FEW ISOLATED LIGHTNING STRIKES.
   
   ..MEAD.. 12/26/2004
   
   ...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 2 OUTLOOK IS SCHEDULED BY 1730Z