Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 831 AM EDT Tue Jul 10 2018 Valid 00Z Wed Jul 11 2018 - 00Z Wed Jul 18 2018 Upper-level ridging will build over the region during the next few days. A weakness will move westward just to the north of Hawai'i Friday into next week per the models/ensembles. Isolated windward showers are forecast for most of the week given broad subsidence. Trades will increase this weekend into next week as surface high pressure drifts westward along 40N. Precipitable water values will rise in tandem this weekend though the GFS appeared too high in comparison to the ensembles. Fracasso