SWODY3
SPC AC 090719
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0119 AM CST FRI DEC 09 2011
VALID 111200Z - 121200Z
...SYNOPSIS...
WITHIN ONE BRANCH OF THE PREVAILING SPLIT UPPER FLOW PATTERN...
MODELS CONTINUE TO INDICATE THAT A SIGNIFICANT DIGGING SHORT WAVE
IMPULSE WILL EVOLVE INTO A DEEPENING CLOSED LOW OFF THE CALIFORNIA
COAST SUNDAY/SUNDAY NIGHT. AS THIS OCCURS...SHORT WAVE RIDGING
SHOULD BEGIN TO BUILD ACROSS PARTS OF THE NORTHERN MEXICAN PLATEAU
AND FOUR CORNERS STATES INTO THE SOUTHERN PLAINS...WHILE DOWNSTREAM
TROUGHING LIFTS ACROSS PARTS OF THE MISSISSIPPI VALLEY AND
SOUTHEAST. COINCIDING WITH THESE DEVELOPMENTS...THE CENTER OF AN
EXPANSIVE SURFACE HIGH IS EXPECTED TO SHIFT EAST OF NORTH ATLANTIC
COASTAL AREAS. HOWEVER...SURFACE RIDGING APPEARS LIKELY TO BE SLOW
TO LOSE ITS INFLUENCE OVER THE SOUTHERN PLAINS/LOWER MISSISSIPPI
VALLEY AND NORTHWESTERN GULF OF MEXICO. A GRADUAL DEEPENING OF THE
MOIST GULF OF MEXICO BOUNDARY LAYER COULD COMMENCE DURING THIS
PERIOD...BUT A SUBSTANTIVE INLAND RETURN FLOW IS UNLIKELY...AND
CONVECTIVE POTENTIAL ACROSS THE SOUTH CENTRAL STATES...AS WELL AS
MUCH OF THE REST OF THE NATION...IS EXPECTED TO REMAIN LOW.
..KERR.. 12/09/2011
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