SWODY1
SPC AC 271545
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1045 AM CDT SAT SEP 27 2008
VALID 271630Z - 281200Z
...NO SVR TSTM AREAS FORECAST...
LIMITED CONVECTIVE POTENTIAL ACROSS THE CONUS THIS FORECAST PERIOD.
HIGH PRESSURE COVERS MUCH OF AREA FROM MS VALLEY WWD WITH A
WEAKENING TROUGH OVER THE E. COLD FRONT TRAILING SWWD FROM UPPER
GREAT LAKES TO NRN KS HAS LITTLE IN THE WAY OF UPPER SUPPORT AND
SHOULD GRADUALLY WEAKEN AS IT CONTINUES EWD THRU THE GREAT LAKES AND
STALLS ACROSS THE CENTRAL PLAINS.
WHILE SEVERE THUNDERSTORMS NOT EXPECTED GIVEN THE WEAK UPPER WINDS
AND LIMITED MOISTURE/INSTABILITY...A FEW STRONG STORMS IN RESPONSE
TO DAYTIME COULD DEVELOP NEAR THE FRONTAL ZONE BOTH IN THE CENTRAL
HIGH PLAINS AND ACROSS THE GREAT LAKES.
AN AXIS OF WARM/VERY MOIST AIR HAS SPREAD N ACROSS THE CHESAPEAKE
BAY REGION IN NERN QUADRANT OF WEAKENING NC UPR LOW. MODEST SFC
HEATING AND WEAK BUT PERSISTENT LOW LVL CONVERGENCE WILL SUPPORT
BANDS/CLUSTERS OF SLOWLY-MOVING CONVECTION/STORMS THROUGH THE
DAY...DESPITE WEAK LOW TO MID LVL LAPSE RATES. THE UPR SYSTEM AND
ASSOCIATED WIND FIELD SHOULD CONTINUE TO WEAKEN AS THE LOW BEGINS TO
DRIFT NEWD AHEAD OF MS VLY TROUGH.
..HALES/CROSBIE.. 09/27/2008
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