HAWAII EXTENDED FORECAST DISCUSSION NWS HYDROMETEOROLOGICAL PREDICTION CENTER COLLEGE PARK MD 652 AM EDT SUN SEP 16 2012 VALID 00Z MON SEP 17 2012 - 00Z MON SEP 24 2012 GUIDANCE FORECAST SPREAD AND UNCERTAINTY IS RELATIVELY LOW WITH RESPECT TO THE LATEST EXPECTED EVOLUTION FOR THE LARGER SCALE FLOW PATTERN EFFECTING HAWAII OVER THE UPCOMING WEEK. IN THIS PATTERN...HIGH PRESSURE CENTERED WELL NORTHEAST OF THE STATE AND ASSOCIATED ISLAND TRADES SHOULD GRADULLY WEAKEN FROM MODERATE LEVELS. LIMITED WINDWARD SHOWERS AND MOISTURE SHOULD PREVAIL FOR THE MOST PART...BUT MODELS AND ENSEMBLES STILL SIMILARLY SHOW AMPLIFIED MID-UPPER LEVEL TROUGH/SYSTEM DEVELOPMENT LATE WEEK/NEXT WEEKEND OVER THE N-CENTRAL PACIFIC WHOSE INFLUENCE DOWN INTO THE LOWER LATITUDES SEEMS TO ALLOW FOR A BETTER MOISTURE FUELED SHOWERS CONDUIT UP INTO THE HAWAIIAN ISLANDS HEADING INTO NEXT WEEKEND. SCHICHTEL