Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 750 AM EDT Sat Oct 22 2016 Valid 00Z Sun Oct 23 2016 - 00Z Sun Oct 30 2016 A Strong surface high pressure ridge north of Hawai'i over the next several days will keep a breezy trade wind pattern in place over the area. Pockets of drier air rotating around the ridge will move across the islands as the weekend progresses and remain in place through most of next week. The dry precipitable water (pw) anomalies are 1-2 standard deviations below normal by the middle of next week. The core of the high pressure builds north of the islands mid to late next week, keeping conditions stable. Scattered windward showers are expected with totals limited due to the limited available moisture. As the 850 mb high moves to a location east of due north next weekend, both the gfs and ecmwf showing an increase in moisture with pw values increasing next weekend. Weak disturbances in the nearly zonal flow could produce an increase in shower activity. The models/ensemble means are in better than average agreement, supporting a consensus based approach to the forecast. Petersen