HAWAII EXTENDED FORECAST DISCUSSION NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 808 AM EDT FRI SEP 13 2013 VALID 00Z SAT SEP 14 2013 - 00Z SAT SEP 21 2013 SHOWERS ASSOCIATED WITH THE DISSIPATING BOUNDARY OVER THE SE ISLANDS WILL DIMINISH IN COVERAGE AFTER TODAY. BY MONDAY... UPPER RIDGING AND SFC HIGH PRESSURE WILL STRENGTHEN TO THE NORTH AND THEN NORTHWEST OF THE STATE IN RESPONSE TO DIGGING TROUGHING NEAR OR JUST SOUTH OF THE GULF OF ALASKA. THE MODELS/ENSEMBLES HAVE HAD A TOUGH TIME RESOLVING THE DIFFERENCES IN THE NORTHEAST PACIFIC BUT HAVE BEEN MORE STABLE IN THE SUBTROPICS SOUTH OF 35N. MODEST TO PERHAPS BRISK TRADES SHOULD RULE NEXT WEEK WITH AN INCREASED PRESSURE GRADIENT. PW VALUES SHOULD OSCILLATE ON EITHER SIDE OF AVERAGE VALUES /1.35 INCHES PLUS OR MINUS A TENTH OR TWO/... AS BOUTS OF MOISTURE PASS BY. WINDWARD/TERRAIN SHOWERS WILL BE THE LIKELY MODE IN A FAIRLY TYPICAL PATTERN. FRACASSO