Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 814 AM EDT Mon Jun 18 2018 Valid 00Z Tue Jun 19 2018 - 00Z Tue Jun 26 2018 Latest guidance is fairly consistent and agreeable with the forecast through early next week. During the first half of this week trades will be on the light side as a weakening front to the north approaches. The weak trades will allow for some land and sea breezes. An axis of higher precipitable water values associated with the weakening front will reach the state but fairly high heights aloft given the proximity of ridging aloft to the northwest/north will tend to keep most shower activity scattered and light. A more typical trade regime with windward shower focus will become established by the latter half of the week. Behind a front passing through the mid-latitude Pacific late in the week, strong high pressure will build across the eastern half of the Pacific. This high will bring trades up to moderate-brisk levels for the weekend and early next week. Precipitable water values should decrease relative to the Monday-Wednesday period but an occasional pocket of enhanced moisture is possible. The combination of stronger trades and an upper level weakness/low approaching from the east may provide at least modest rainfall enhancement over the Big Island in the latter part of the period. Finer details of this possible upper feature have low predictability at the days 5-7 time frame but most solutions are fairly similar with the timing/strength through next Monday. Today the slower 00Z CMC is the one feature that differs from consensus. Rausch