SPC AC 120836
   
   DAY 3 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0236 AM CST SAT MAR 12 2005
   
   VALID 141200Z - 151200Z
   
   ...NO SVR TSTM AREAS FORECAST...
   
   ...SYNOPSIS...
   UPPER PATTERN NOT EXPECTED TO CHANGE VERY MUCH INTO THE DAY 3 PERIOD
   AS A POLAR VORTEX CONTINUES TO RETROGRADE WWD OVER CENTRAL CANADA. 
   SHORT WAVE TROUGH EXPECTED TO BE LOCATED OVER THE NRN INTERMOUNTAIN
   WEST AT 12Z MONDAY WILL DIG SSEWD TOWARD THE FOUR CORNERS REGION
   WITHIN NLY FLOW ALOFT BETWEEN THE POLAR VORTEX AND AN ERN PACIFIC
   RIDGE. THIS WILL MAINTAIN WSWLY MID-UPPER LEVEL FLOW FROM THE SWRN
   STATES TO THE MID-SRN ATLANTIC COASTAL STATES. A SHORT WAVE
   TROUGH...MOST AMPLIFIED IN THE NAM...WILL TRACK EWD FROM THE MID MS
   VALLEY TO OFF THE MID ATLANTIC COAST MONDAY NIGHT.  MEANWHILE...A
   WEAKER SHORT WAVE TROUGH EMBEDDED WITHIN SRN STREAM FLOW IS PROGGED
   TO MOVE EWD FROM THE LOWER MS VALLEY TO OFF THE GA/SC COAST.
   
   AT THE SURFACE...A WEAK LOW ASSOCIATED WITH THE SRN STREAM FEATURE
   WILL TRACK EWD ACROSS SRN GA MONDAY BEFORE MOVING OFF THE SC/GA
   COAST BY 15/00Z.  A TRAILING COLD FRONT WILL THEN PUSH SWD TOWARD
   CENTRAL FL AS SURFACE HIGH PRESSURE CONTINUES TO BUILD E AND SE OVER
   THE ERN STATES.
   
   ...SERN STATES INTO NRN FL...
   DESPITE THE FORECAST PASSAGE OF A WEAK SHORT WAVE TROUGH OVER THIS
   REGION...MODELS INDICATED HEIGHT CHANGES OVER SRN GA/NRN FL TO BE
   MAINLY NEUTRAL OR HAVE SLIGHT RISES...WITH MID LEVEL TEMPERATURES
   PROGGED TO INCREASE.  MODEST LOW LEVEL LAPSE RATES WILL TEND TO
   MINIMIZE THE DESTABILIZATION POTENTIAL IN ADVANCE OF THE COLD
   FRONT...DESPITE SURFACE DEWPOINTS IN THE LOWER 60S.  ALTHOUGH
   THUNDERSTORMS WILL BE LIKELY ALONG THE SEWD MOVING COLD FRONT...WEAK
   MID LEVEL FORCING AND WEAK INSTABILITY ARE EXPECTED TO LIMIT THE
   SEVERE POTENTIAL.
   
   ..PETERS.. 03/12/2005
   
   ...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 3 OUTLOOK IS SCHEDULED BY 1100Z