HAWAII EXTENDED FORECAST DISCUSSION NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 758 AM EDT MON APR 21 2014 VALID 00Z TUE APR 22 2014 - 00Z TUE APR 29 2014 THE GLOBAL NUMERICAL GUIDANCE HAS STEADILY INDICATED AN ESSENTIALLY UNPERTURBED STRETCH OF TRADE WINDS FOR HAWAI'I FOR SOME TIME NOW, AND WITH THE ADVENT OF THE 00Z/21 MODELS, THAT STILL SEEMS TO BE THE CASE. THERE APPEARS TO BE ENOUGH DEEP-LAYER MOISTURE IN THE FLOW TO FUEL PRODUCTIVE WINDWARD SHOWERS EACH DAY, WITH 7-DAY TOTALS OFF THE 27-KM ECMWF EXCEEDING 3-4" OVER THE FAVORED TERRAIN OF THE BIG ISLAND. THE ONLY LARGE-SCALE NEWS OF NOTE WITH THE MODELS IS THAT THE MEAN TROUGH OVER THE NORTHEAST PACIFIC IS PROGGED TO AMPLIFY SOMEWHAT BY EARLY NEXT WEEK, WHICH WOULD PUT A DENT IN THE ZONAL MOISTURE BAND ACROSS THE ISLANDS. CISCO