HAWAII EXTENDED FORECAST DISCUSSION NWS HYDROMETEOROLOGICAL PREDICTION CENTER COLLEGE PARK MD 723 AM EST WED NOV 07 2012 VALID 00Z THU NOV 08 2012 - 00Z THU NOV 15 2012 7/00Z GFS/ECMWF OPERATIONAL AND ENSEMBLE GUIDANCE REMAIN FIRM WITH A MID-LEVEL RIDGE ALONG 30N AND FRESH TRADES CONTINUING THROUGH DAY 7. THE GFS/ECMWF GUIDANCE BEGINS TO DEVIATE AROUND DAY 5 WITH THE DEPTH/LOCATION OF LONG WAVE DEVELOPMENT IN THE NORTHERN PACIFIC. THE ECMWF ALLOWS A H7 WAVE IN THE SUBTROPICS TO FORM BETWEEN 140W-150W AND 20N AND DRIFT THE WAVE WESTWARD ACROSS THE ISLANDS. THE 00Z GFS KEEPS THE WAVE FAR ENOUGH SOUTH THAT IS BARELY BRUSHES THE BIG ISLAND. FOR DAY 6-7...WOULD RECOMMEND A BLEND OF THE 00Z ECMWF/GFS ENSEMBLE MEANS WITH ANTICIPATION OF A SUBTLE CHANGE IN MID-LEVEL MOISTURE APPROACHING FROM THE EAST AND SOUTHEAST AROUND DAY 5. VOJTESAK