SPC AC 260717
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0217 AM CDT THU SEP 26 2013
VALID 281200Z - 291200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
A VIGOROUS SHORTWAVE TROUGH WILL MOVE RAPIDLY FROM THE NRN/CNTRL
PLAINS NEWD INTO NRN ONTARIO BY EARLY SUN. AN ATTENDANT COLD FRONT
WILL PUSH EWD FROM THE UPPER MS VALLEY TO THE GREAT LAKES...WITH
TRAILING PORTION SHIFTING SWD ACROSS THE SRN PLAINS. A STOUT
MID-LEVEL ANTICYCLONE WILL REMAIN ANCHORED NEAR THE WRN GULF COAST
WITH A RIDGE EMANATING NEWD TO NEW ENGLAND.
...CNTRL CONUS...
WITH A SPATIALLY DECREASING BELT OF STRONG MID-LEVEL S/SWLYS
GENERALLY LAGGING THE AFOREMENTIONED COLD FRONT AND LOW-LEVEL SWLYS
DIMINISHING GREATLY WITH SWRN EXTENT...SEVERE THUNDERSTORM POTENTIAL
APPEARS LOW. WHERE SUFFICIENT BUOYANCY SHOULD EXIST FOR DEEP
CONVECTION FROM THE OZARK PLATEAU TO THE SRN PLAINS...POOR MID-LEVEL
LAPSE RATES...WEAKENING SHEAR IN THE WARM SECTOR AND UNDERCUTTING OF
THE COLD FRONT WILL LIKELY MITIGATE ORGANIZED SEVERE. FARTHER
N...BUOYANCY SHOULD REMAIN SHALLOW AND QUITE MEAGER WITHIN A NARROW
CORRIDOR ALONG THE FRONT. ALTHOUGH DEEP-LAYER WIND FIELDS WILL BE
IMPRESSIVE BEHIND THE BOUNDARY...THEY SHOULD BE NEARLY MERIDIONAL
SUGGESTING THAT RAIN BANDS MAY LARGELY REMAIN POST-FRONTAL.
..GRAMS.. 09/26/2013
CLICK TO GET WUUS03 PTSDY3 PRODUCT
NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0730Z
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