Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 746 AM EDT Thu Apr 02 2015 Valid 00Z Fri Apr 03 2015 - 00Z Fri Apr 10 2015 In the large scale there is similarity among most of the guidance at the surface and aloft with typical spread developing next week. The models/ensemble means expect moderate to brisk trades with primarily windward focused showers for most of the period as high pressure will be positioned to the north of the state the next few days and then drift northeast of the islands through the weekend and early next week. The models/ensemble means show an upper trough forming northwest of the islands early to mid next week. The GFS is a little more assertive in allowing an increase in precipitable water (pw) values next week. With lower pw values in the mean forecasts, I would prefer to lean more towards the GEFS mean and ECMWF pw forecasts. Petersen