Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 810 AM EDT Wed Apr 05 2017 Valid 00Z Thu Apr 06 2017 - 00Z Thu Apr 13 2017 Guidance agrees fairly well with the forecast through the weekend. Trades will likely freshen a bit around Friday as high pressure passes to the north of the state. Winds should turn southeasterly during the weekend in response to the high reaching the eastern Pacific and a surface front off to the distant northwest of the islands. Expect most shower activity to be windward focused and on the light side with precipitable water values tending to be below average into the weekend and an upper level ridge passing over the state late in the week. By next week some detail uncertainties emerge with approaching upper level shortwave energy but with less influence on the surface front approaching from the northwest. 00z/06z GFS runs and 00z GEFS ensembles bring height falls farther southeastward compared to other other guidance, so a compromise approach looks most reasonable at this time. Model runs appear more similar with placement of the surface front than what might be expected given the differences aloft. Regardless of exact details there should be at least a modest increase in rainfall with the front lingering near the northwestern islands and precipitable water values reaching near to slightly above normal levels. Trades should return to a more easterly orientation toward the middle of next week as trailing high pressure builds north of the state. Rausch