Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 724 AM EST Fri Dec 04 2015 Valid 00Z Sat Dec 05 2015 - 00Z Sat Dec 12 2015 The mid-latitude pattern will be progressive and active throughout the next 7 days. However, a sprawling 588-dm upper ridge stretching about the subtropics will keep the primary axis of height falls north of the Hawai`ian island chain. The resultant surface ridging to the north should continue to reinforce an active period of moderate to occasionally stronger east-southeast trade winds. Deterministic guidance generally depicts 20 to 30 knots of flow throughout the period. Regarding precipitation, tropospheric moisture appears rather limited with precipitable waters in the 0.50 to perhaps 1 inch range. However, disorganized showers and thunderstorms could develop in response to the diurnal heating cycle, particularly over elevated terrain. Rubin-Oster