SPC AC 181507
   
   DAY 3 CONVECTIVE OUTLOOK RESENT 1
   NWS STORM PREDICTION CENTER NORMAN OK
   0907 AM CST THU MAR 18 2004
   
   VALID 201200Z - 211200Z
   
   ...THERE IS A SLGT RISK OF SVR TSTMS FROM ERN OK INTO WRN KY AND WRN
   TN....
   
   ...SYNOPSIS...
   MID/UPPER LEVEL RIDGE AMPLIFIES OVER THE WESTERN U.S. DURING THE
   PERIOD AS TROUGH SWINGS FROM MANITOBA SEWD INTO THE ERN GREAT LAKES.
    THIS WILL ALSO INCREASE NWLY FLOW OVER THE CENTRAL AREAS OF THE
   U.S. A STRONG COLD FRONT WILL THEN MOVE THROUGH THE OHIO AND
   MISSISSIPPI VALLEYS AND SOUTHERN PLAINS DURING THE DAY ON SATURDAY.
   
   
   ...AREAS FROM ERN OK INTO SRN IL AND WRN KY...
   
   STRONG COLD FRONT WILL EXTEND FROM NWRN LOWER MI SWWD THROUGH NERN
   MO AND S CENTRAL KS AT 20/12Z. BY 21/00Z...THIS FRONT WILL PROGRESS
   EWD AND SWD EXTENDING FROM THE ERN GREAT LAKES WSWWD INTO NWRN TX. 
   AHEAD OF THE FRONT...AIR MASS IS EXPECTED TO BE MOIST AND MODERATELY
   UNSTABLE WITH SURFACE DEWPOINTS IN THE LOW TO MID 60S AND CAPE
   VALUES BETWEEN 2000 AND 3000 J/KG.  STRONG THERMAL GRADIENT
   ASSOCIATED WITH ADVANCING FRONTAL BOUNDARY IS EXPECTED TO PROVIDE
   PLENTY OF LIFT TO ENHANCE LINE OF STRONG/SEVERE THUNDERSTORMS THAT
   WILL MOVE SEWD/SWD ACROSS THE AREA.  GIVEN THE STRENGTH OF SURFACE
   RIDGE AND GRADIENT ASSOCIATED WITH FRONTAL BOUNDARY...ACTIVITY IS
   EXPECTED TO PRODUCE STRONG...DAMAGING WINDS AS IT PUSHES SSEWD
   ACROSS IL..MO INTO TN...AR AND OK DURING THE PERIOD.
   
   ..MCCARTHY.. 03/18/2004
   
   ...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 3 OUTLOOK IS SCHEDULED FOR 1200Z