Aug 25, 2013 1300 UTC Day 1 Convective Outlook

DAY 1 CONVECTIVE OUTLOOK  

   NWS STORM PREDICTION CENTER NORMAN OK
   0742 AM CDT SUN AUG 25 2013

   VALID 251300Z - 261200Z

   ...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PARTS OF THE UPPER MS
   VALLEY INTO UPPER GREAT LAKES...

   ...SYNOPSIS...

   AN EXPANSIVE MID TO UPPER-LEVEL ANTICYCLONE WILL REMAIN ANCHORED
   OVER ERN KS/WRN MO WITH A NUMBER OF LOW-AMPLITUDE VORTICITY MAXIMA
   PIVOTING AROUND ITS PERIPHERY.  TO THE WEST...A PRONOUNCED VORTICITY
   MAXIMUM WITHIN THE BASE OF A LARGER-SCALE TROUGH OVER THE FAR NERN
   PACIFIC WILL PROGRESS NNEWD FROM THE NRN CA COAST ACROSS THE PACIFIC
   NW.  IN THE LOW LEVELS...A WEAK COLD FRONT ASSOCIATED WITH A
   MIDLEVEL IMPULSE CROSSING ONTARIO INTO QUEBEC WILL SETTLE SWD INTO
   THE UPPER GREAT LAKES.  THE WRN EXTENSION OF THIS BOUNDARY WILL
   REMAIN QUASI-STATIONARY FROM LOW PRESSURE OVER SD TO A DEVELOPING
   LEE CYCLONE OVER CNTRL MT.