HAWAII EXTENDED FORECAST DISCUSSION NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 831 AM EDT SAT JUN 29 2013 VALID 00Z SUN JUN 30 2013 - 00Z SUN JUL 07 2013 LOCALIZED SHOWERS AND LIGHTER THAN USUAL TRADES WILL PREVAIL ACROSS THE ISLANDS THROUGH THE WEEKEND AS THE WEAK UPPER LOW NEAR THE ISLANDS CONTINUES TO DRIFT WESTWARD. MORE TYPICAL TRADES AND LESS SHOWER ACTIVITY SHOULD RETURN TO THE ISLAND BY EARLY NEXT WEEK AS HIGH PRESSURE NORTH OF THE ISLANDS EXPANDS EASTWARD. THE LARGE-SCALE PATTERN CONTINUES TO BE REPRESENTED BY A SUBTROPICAL HIGH OR RIDGE OVER THE CENTRAL PACIFIC...WITH AN ACCOMPANYING LARGE AMPLITUDE UPPER TROUGH OVER THE EASTERN PACIFIC...WITH ONLY SLIGHT MODIFICATION TO THE FLOW DEPICTED THROUGH NEXT WEEK BY THE LATEST GUIDANCE. GIVEN THE SLOWLY-CHANGING CONDITIONS...THE SLOWER PROGRESSING 06Z GFS/00Z ECMWF/ECMWF ENSEMBLE MEAN ARE GENERALLY MORE PREFERRED THAN THE 00Z GFS FROM THE MIDDLE OF NEXT WEEK ONWARD. JAMES