SWOD48
SPC AC 200903
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0303 AM CST SUN JAN 20 2008
VALID 231200Z - 281200Z
MEDIUM RANGE MODELS CONTINUE ZONAL FLOW THROUGH EARLY NEXT WEEK AND
THEN DEEPEN AN UPPER-LEVEL TROUGH OVER THE GREAT LAKES REGION IN THE
MID WEEK TIME-FRAME. AT THE SFC...MODEL FORECASTS KEEP HIGH PRESSURE
DOMINANT ACROSS THE CNTRL AND ERN US THROUGH WEDNESDAY AND THIS WILL
LIKELY SUPPRESS MOISTURE RETURN ACROSS THE SRN STATES MAKING
THUNDERSTORM POTENTIAL LOW. BY LATE NEXT WEEK...THE MODELS DEVELOP A
PLAINS SFC TROUGH AND MOVE A FLAT UPPER-LEVEL RIDGE EWD ACROSS THE
CNTRL US. THIS WOULD BE MORE FAVORABLE FOR MOISTURE RETURN INTO THE
MS VALLEY. IF THIS SCENARIO IS CLOSE TO VERIFYING...THEN SEVERE
STORMS MAY BE POSSIBLE ACROSS PARTS OF THE SERN US LATE IN THE
PERIOD. HOWEVER...UNCERTAINTY REMAINS HIGH AND THE POTENTIAL DOES
NOT WARRANT AN OUTLOOK ATTM.
.BROYLES.. 01/20/2008
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