SPC AC 150739
   
   DAY 3 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0139 AM CST FRI FEB 15 2013
   
   VALID 171200Z - 181200Z
   
   ...NO TSTM AREAS FORECAST...
   
   ...SYNOPSIS...
   MODELS SUGGEST THAT A LARGE UPPER TROUGH...OVER THE EASTERN U.S.
   EARLY SUNDAY...WILL DEAMPLIFY AND BEGIN TO GRADUALLY SHIFT EAST OF
   THE ATLANTIC COAST DURING THIS FORECAST PERIOD.  IN ITS WAKE...A
   SERIES OF SIGNIFICANT SHORT WAVE TROUGHS...WITHIN A BRANCH OF FLOW
   EMERGING FROM THE MID LATITUDE PACIFIC...IS FORECAST TO REMAIN
   PROGRESSIVE...WITH ONE DIGGING ACROSS AND TO THE EAST OF THE
   ROCKIES...AND ANOTHER DIGGING TOWARD THE PACIFIC NORTHWEST COAST. 
   AT LEAST SOME PHASING OF THE LEAD IMPULSE WITH A BELT OF WESTERLIES
   EMERGING FROM SUBTROPICAL EASTERN PACIFIC MAY COMMENCE EAST OF THE
   ROCKIES...AND AN ASSOCIATED SURFACE COLD FRONT IS EXPECTED TO
   ADVANCE EAST OF THE NORTHERN/CENTRAL ROCKIES.  THIS PROBABLY WILL BE
   PRECEDED BY STRENGTHENING SOUTHERLY LOW-LEVEL FLOW ACROSS THE
   SOUTHERN PLAINS INTO THE LOWER MISSOURI VALLEY... WITH GUIDANCE
   GENERALLY INDICATING A 50-60+ KT 850 MB JET BY 12Z MONDAY. 
   HOWEVER...DUE TO SEVERAL PRECEDING DAYS OF DRYING NORTHERLY FLOW
   ACROSS THE GULF COAST AND GULF OF MEXICO... SUFFICIENT BOUNDARY
   LAYER MOISTENING TO SUPPORT A SUBSTANTIVE INLAND MOISTURE RETURN
   DOES NOT APPEAR LIKELY.  AS A RESULT... GENERALLY STABLE CONDITIONS
   ARE EXPECTED TO PERSIST SUNDAY AND SUNDAY NIGHT...WITH LITTLE RISK
   FOR THUNDERSTORM ACTIVITY.
   
   ..KERR.. 02/15/2013
   
   CLICK TO GET WUUS03 PTSDY3 PRODUCT

   NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0830Z