SPC AC 100749
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0149 AM CST MON DEC 10 2007
VALID 121200Z - 131200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
SWRN U.S. UPPER TROUGH IS FORECAST TO FINALLY EJECT ENEWD THROUGH
THE SRN AND CNTRL PLAINS AND INTO THE MID MS VALLEY REGION
WEDNESDAY. SECONDARY SURGE OF HIGH PRESSURE WILL PROMOTE CONTINUED
SEWD ADVANCE OF THE COLD FRONT THAT CURRENTLY EXTENDS FROM THE SRN
PLAINS INTO THE TN VALLEY REGION. THIS BOUNDARY WILL LIKELY EXTEND
FROM THE TN VALLEY SWWD THROUGH THE LOWER MS VALLEY AND INTO THE WRN
GULF BY THE END OF THIS PERIOD.
...S TX THROUGH LOWER MS VALLEY AND SERN STATES...
MID TO UPPER 60S DEWPOINTS WILL EXIST IN PRE-FRONTAL WARM SECTOR
FROM S TX NEWD INTO THE LOWER MS VALLEY EARLY WEDNESDAY. WEAK MID
LEVEL LAPSE RATES WILL CONTRIBUTE LOW MLCAPE...ESPECIALLY WITH NEWD
EXTENT INTO THE LOWER MS AND TN VALLEYS. THE MARGINAL THERMODYNAMIC
ENVIRONMENT AND WEAK FORCING WILL LIKELY LIMIT ROBUST CONVECTIVE
POTENTIAL IN WARM SECTOR. MOST CONVECTION WILL LIKELY REMAIN
ELEVATED WITHIN ZONE OF DEEPER ASCENT ON COOL SIDE OF SEWD ADVANCING
FRONTAL ZONE. OVERNIGHT...SURFACE CYCLOGENESIS AND STRENGTHENING LOW
LEVEL JET WILL LIKELY OCCUR IN VICINITY OF THE FRONT OVER THE TN
VALLEY AND KY IN RESPONSE TO EJECTING SHORTWAVE TROUGH. STRONG
VERTICAL SHEAR PROFILES WILL EXIST IN THIS REGION. HOWEVER...AT THIS
TIME IT APPEARS INSTABILITY WILL REMAIN INSUFFICIENT FOR A SEVERE
THREAT.
..DIAL.. 12/10/2007
CLICK TO GET WUUS03 PTSDY3 PRODUCT
NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 1100Z
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