HAWAII EXTENDED FORECAST DISCUSSION NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 713 AM EST THU DEC 19 2013 VALID 00Z FRI DEC 20 2013 - 00Z FRI DEC 27 2013 UPPER LOW PORTION OF THE REX BLOCK PATTER OVER THE EAST PACIFIC SHOULD REMAIN TO THE EAST AND THEN SOUTHEAST OF THE 50TH STATE OVER THE NEXT WEEK... WITH THE RECENT 00Z-06Z GFS RUNS /AND GEFS MEAN/ JUST A BIT TO THE EAST OF THE CLUSTER OF THE 00Z ECMWF AND ECMWF/CMC ENSEMBLE MEANS. SFC PRESSURE GRADIENT SHOULD RELAX AS THE STRONG HIGH... 1037MB... NEAR 40N/142W WEAKENS AND THE DOMINANT ESE FLOW BACKS TO MORE EASTERLY AND ENE BY NEXT WEEK. TAIL END OF FRONTAL BOUNDARY BY NEXT THU/D7 SHOULD STAY NORTH OF THE ISLANDS. FRACASSO