Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 819 AM EDT Sat Sep 12 2015 Valid 00Z Sun Sep 13 2015 - 00Z Sun Sep 20 2015 Upper ridging is forecast to slide westward along 40N early next week which will signal a return to more typical East-Northeasterly trades. Ensembles indicate a brief dip in PW values Monday before another surge for Tue-Thu. The recent 00Z/06Z GFS runs differ from the consensus of the ensembles on timing (bringing in drier air early Wed) while the ECMWF ensembles show less spread than the GEFS members. Windward-focused precipitation will prevail this week but modulated by the moisture ebb and flow. Fracasso