SPC AC 081255
   
   DAY 1 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0655 AM CST SAT JAN 08 2005
   
   VALID 081300Z - 091200Z
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM UIL 25 NE HQM EUG 35
   ESE EKA 25 W UKI.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 25 W BVE 30 ESE MOB
   10 S TOI 10 NNE LGC 20 SE ATL MCN 20 WNW MGR 10 SSW AQQ.
   
   ...NO SVR TSTM AREAS FORECAST...
   
   ...SYNOPSIS...
   MAIN FEATURES OF INTEREST THIS PERIOD WITH RESPECT TO DEEP
   CONVECTION WILL BE THE MID LEVEL LOW OFF THE WA/ORE COASTS...AND THE
   SHORTWAVE TROUGH EJECTING ENEWD OVER THE OH VALLEY.  THE OH VALLEY
   TROUGH AND AN ASSOCIATED SURFACE LOW WILL MOVE OVER PA/NY/NEW
   ENGLAND BY EARLY TONIGHT.  VERY WEAK ELEVATED INSTABILITY HAS BEEN
   SUFFICIENT FOR A FEW LIGHTNING STRIKES IN PROXIMITY TO THE MID LEVEL
   DRY SLOT EARLY THIS MORNING OVER WV...BUT THIS CONVECTIVE THREAT
   WILL END BY 13Z.  FARTHER S...A WEAKENING BAND OF THUNDERSTORMS
   PERSISTS ACROSS SE AL/WRN FL PANHANDLE TO THE IMMEDIATE SE OF A
   SURFACE COLD FRONT THAT TRAILS THE OH VALLEY LOW.  BOUNDARY LAYER
   DEWPOINTS IN THE LOW-MID 60S WILL CONTRIBUTE TO SUFFICIENT
   INSTABILITY FOR DEEP CONVECTION TODAY ACROSS THE NE GULF COAST. 
   HOWEVER...POOR MID LEVEL LAPSE RATES AND WEAKENING ASCENT WITH TIME
   SUGGEST THAT THE THUNDERSTORM THREAT SHOULD DIMINISH BY MID-LATE
   AFTERNOON.
   
   ...WA/ORE COASTS...
   SATELLITE IMAGERY SHOWS THE QUASI-STATIONARY LOW W OF AST...WITH A
   BROAD FIELD OF LOW-TOPPED CONVECTION AND A FEW LIGHTNING STRIKES
   NEAR AND OFF THE SW WA AND ORE COASTS. 500 MB TEMPERATURES AOB -32
   C AND MEAN LAPSE RATES OF 7-8 C/KM BELOW 500 MB WILL SUPPORT AT
   LEAST WEAK SURFACE BASED INSTABILITY AND A CONTINUED THREAT FOR
   ISOLATED THUNDERSTORMS TODAY.  THIS THUNDERSTORM THREAT WILL BE
   CONFINED PRIMARILY TO THE COAST...WHILE A COLDER/DRIER AIR MASS WILL
   LIMIT INSTABILITY FARTHER INLAND.
   
   ..THOMPSON.. 01/08/2005
   
   ...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