Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 730 AM EST Mon Dec 15 2014 Valid 00Z Tue Dec 16 2014 - 00Z Tue Dec 23 2014 Models and ensembles reasonably agree in holding the Hawaiian Islands under a mid-upper level ridge into the weekend. A preferred composite solution favors moderate to locally brisk trades and windward terrain limited showers underneath mean surface high pressure centered to the north of the state during this period. These trades may weaken/veer/moisten Sun/Mon with mid-upper level trough and associated frontal system development and approach from the northwest that would weaken the ambient lead high/ridge. Schichtel