Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 658 AM EST Thu Jan 04 2018 Valid 00Z Fri Jan 05 2018 - 00Z Fri Jan 12 2018 Models and ensembles agree to maintain a relatively quite Hawaiian weather pattern into early next week under the influence of deep layered high pressure. Moderate mean trade flow offers below normal moisture and limited windward rainfall potential, with the best chance to squeeze out moisture developing this weekend for the southern islands as impulse energy digs on the eastern periphery of the mid-upper level ridge. There is a decent signal for a pattern transition by next Wednesday/Thursday to include a disruption of trades as a cold front works into the islands from the northwest. This occurs as a supporting mid-upper level trough amplifies and destabilizing height falls pass to the north and over the state. Schichtel