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Nov 20, 2008 1730 UTC Day 2 Convective Outlook
Updated: Thu Nov 20 16:35:45 UTC 2008  (Print Version)
Probabilistic to Categorical Outlook Conversion Table (Effective Feb 14, 2006).
  |  
SPC Day 2 1730Z Outlook Categorical SPC Day 2 1730Z Outlook Categorical Legend
 Forecast Discussion

   SPC AC 201634
   
   DAY 2 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   1034 AM CST THU NOV 20 2008
   
   VALID 211200Z - 221200Z
   
   ...NO SVR TSTM AREAS FORECAST...
   
   ...SYNOPSIS...
   
   LARGE AREA OF CP HIGH PRESSURE WILL SETTLE ACROSS THE ERN TWO THIRDS
   OF THE U.S. FRIDAY. AN UPPER TROUGH WILL AMPLIFY OVER THE ERN STATES
   WITHIN ZONE OF STRONG LOW LEVEL COLD ADVECTION ALONG ERN PERIPHERY
   OF THE HIGH PRESSURE AREA. THE UPPER TROUGH WILL REMAIN PROGRESSIVE
   AND MOVE OFFSHORE FRIDAY NIGHT.
   
   
   
   ...LOWER GREAT LAKES...
   
   INVERSION HEIGHTS WILL RISE FRIDAY MORNING AND AFTERNOON AS A
   THERMAL TROUGH BUILDS SE RESULTING IN THE CONVECTIVE LAYER EXTENDING
   TO NEAR 700 MB WHERE TEMPERATURES BELOW -20C WILL EXIST. SFC-700 MB
   LAPSE RATES AND TEMPERATURE PROFILES WILL SUPPORT POTENTIAL FOR
   ISOLATED LIGHTNING STRIKES ALONG THE EASTERN SHORES OF LAKE ERIE AND
   LAKE ONTARIO WITHIN NW-SE ORIENTED LAKE EFFECT BANDS THROUGH THE
   AFTERNOON.
   
   ..DIAL.. 11/20/2008
   
   CLICK TO GET WUUS02 PTSDY2 PRODUCT

   NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 0700Z

        
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Page last modified: November 20, 2008
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