HAWAII EXTENDED FORECAST DISCUSSION NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 742 AM EDT TUE MAY 13 2014 VALID 00Z WED MAY 14 2014 - 00Z WED MAY 21 2014 WITH RESPECT TO SENSIBLE WEATHER (SKY COVER...WINDS/POPS AND TEMPS)---DECAYING SHEAR LINE/COLD FRONT REMAINS A SHORT-TERM FORECAST CONCERN FOR THE ISLANDS. 13/00Z GFS/ECMWF MASS FIELDS MAINTAIN A VERTICALLY-STACKED SFC TO 500MB LOW INVOF 39N 152.5W THROUGH 36 HOURS...THEN SLOWLY LIFT THE LOW NORTHWARD TO APPROXIMATELY 42N 151.5W BY 60 HOURS (15/12Z). BLOCKY UPPER-LEVEL RIDGE/HIGH LOCATED OVER THE ALEUTIANS AND SOUTHERN BERING SEA PRODUCES ANOTHER CUTOFF LOW INVOF 40N 170W WHICH LINGERS OVER THE MID-LATITUDE CENTRAL PACIFIC INTO EARLY NEXT WEEK (19/12Z). BEYOND DAY 6...13/00Z GEFS/ECENS MEANS LOOKED GOOD WITH RESPECT TO THE UNDULATION OF THE FLOW ALOFT WITH THE ECENS SOLUTION MAINTAINING A 'MORE DEFINITIVE' UPPER-LEVEL SYSTEM TO THE NORTHWEST OF KAUAI. IF THIS COMES TO FRUITION...BY NEXT TUESDAY...TRADES WILL RELAX AND MORE OF A SOUTHEASTERLY LOW-LEVEL WIND DEVELOPS STATEWIDE...WITH INCREASING SHEAR ALOFT (SOUTHWESTERLIES)...AND AN UPTICK IN DEEP CONVECTION. VOJTESAK