SWODY2
SPC AC 231709
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1109 AM CST SUN DEC 23 2007
VALID 241200Z - 251200Z
..NO TSTM AREAS FORECAST...
..SYNOPSIS...
UPPER FLOW PATTERN IS EXPECTED TO REMAIN PROGRESSIVE...BUT SHOULD
BECOME MORE ZONAL IN THE WAKE OF THE DEEP DAY 1 CYCLONE DEPARTING
THE NERN STATES/QUEBEC ON MONDAY. THIS WILL ALLOW A COUPLE OF SHORT
WAVE TROUGHS AMPLIFYING SEWD INTO THE UPPER MS VALLEY AND TOWARD THE
SRN PLAINS DURING 1 PERIOD TO MOVE EWD INTO THE GREAT LAKES...OH/TN
VALLEYS AND GULF COAST STATES.
IN ADDITION TO RECENT FRONTAL INTRUSION SHUNTING GREATER MOISTURE
SWD INTO THE GULF BASIN...SURFACE RIDGE LOCATED ACROSS THE GULF
COAST STATES ON MONDAY WILL MAINTAIN OFFSHORE FLOW ACROSS THIS
REGION. THIS WILL PRECLUDE MOISTURE RETURN/DESTABILIZATION INTO THE
LOWER MS VALLEY AND PRECLUDE DEEP CONVECTIVE DEVELOPMENT...DESPITE
FORCING FOR ASCENT EXPECTED TO SPREAD EWD ACROSS THIS REGION AHEAD
OF SRN PLAINS SHORT WAVE TROUGH.
ELSEWHERE...STABLE BOUNDARY LAYER CONDITIONS WILL PREVENT CONVECTIVE
DEVELOPMENT ACROSS THE REST OF THE CONUS...AND THUS MAINTAIN A NO
TSTM FORECAST FOR DAY 2 FORECAST PERIOD.
.PETERS.. 12/23/2007
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