SPC Discussion
Posted by JAC on 6/15/2009, 7:32 am


DAY 4-8 CONVECTIVE OUTLOOK 
  NWS STORM PREDICTION CENTER NORMAN OK
  0350 AM CDT MON JUN 15 2009
 
  VALID 181200Z - 231200Z
 
  ...DISCUSSION...
 
  00Z MEDIUM RANGE GUIDANCE IS IN FAIRLY GOOD AGREEMENT REGARDING A
  STRONG SHORTWAVE TROUGH THAT WILL DIG ACROSS THE NRN ROCKIES INTO
  THE CNTRL PLAINS THURSDAY.  SIGNIFICANT HEIGHT FALLS AND
  STRENGTHENING MID LEVEL FLOW WILL UNDOUBTEDLY ENHANCE THE POTENTIAL
  FOR ORGANIZED SEVERE THUNDERSTORMS ALONG ADVANCING COLD FRONT FROM
  THE UPPER MS VALLEY TO ERN NEB.  BOTH THE GFS/ECMWF SUGGEST THIS
  FEATURE WILL SHIFT ACROSS THE OH VALLEY FRIDAY WITH POCKET OF COOL
  MID LEVEL TEMPERATURES AND FLOW ON THE ORDER OF 60KT AT 500MB.  IF
  THIS SCENARIO UNFOLDS THEN SEVERE THUNDERSTORMS SHOULD DEVELOP BY
  EARLY AFTERNOON ALONG COLD FRONT BEFORE SWEEPING EWD.
 
  ..DARROW.. 06/15/2009
16
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Possible Severe Weather this Weekend for Great-Lakes & Ontario - JAC, 6/15/2009, 7:29 am
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