SPC AC 120803
   
   DAY 3 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0303 AM CDT SUN SEP 12 2004
   
   VALID 141200Z - 151200Z
   
   ...THERE IS A SLGT RISK OF SVR TSTMS OVER PARTS OF NEB...IA...AND
   SOUTHERN MN...
   
   ...UPPER MIDWEST...
   BROAD UPPER TROUGH IS FORECAST TO BE ACROSS THE NORTHERN PLAINS ON
   TUESDAY...WITH BAND OF 40-60 KNOT 500MB WINDS FROM WY INTO THE
   WESTERN GREAT LAKES.  MAIN SURFACE BAROCLINIC ZONE WILL LIKELY
   EXTEND FROM NORTHERN WI INTO EASTERN NEB AND NORTHERN KS.  AIRMASS
   ALONG/AHEAD OF FRONT WILL BECOME MODERATELY UNSTABLE OVER PARTS OF
   NEB/IA...AND AT LEAST MARGINALLY UNSTABLE FROM THERE NORTHWARD TO
   THE U.S./CANADIAN BORDER.  STRONG CONVERGENCE ALONG FRONT SHOULD AID
   IN THE DEVELOPMENT OF SCATTERED AFTERNOON THUNDERSTORMS.  PARAMETERS
   APPEAR FAVORABLE FOR ISOLATED SEVERE STORMS IN THIS REGION...WITH
   SUPERCELLS POSSIBLE.  AFFECTS FROM CONVECTIVE ACTIVITY ON DAY2
   LIMITS CONFIDENCE IN LOCATION OF GREATEST THREAT ON TUESDAY.
   
   ..HART.. 09/12/2004
   
   ...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 1100Z