Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 830 AM EDT Sat May 05 2018 Valid 00Z Sun May 06 2018 - 00Z Sun May 13 2018 ...A showery period continues for the Big Island... Models and ensembles show that a well defined cold front now trailing southward across the central Pacific will drift eastward across the islands this weekend. An enhanced plume of precipitable water well depicted on latest blended tpw imagery will likewise shift eastward to fuel locally enhanced shower activity. But as the front moves east, the coverage and amounts of rain should gradually decline as the weekend progresses as both the departure of the upper trough and gradual approach of the upper ridge from the northwest support drier air advecting into the islands starting in the west and then into the central islands. High pressure builds north of the islands in the early to middle parts of next week, so the remnant frontal boundary dies and the flow gradually becomes easterly with moderate trade winds returning. The high available moisture over the big Islands provides potential for above normal rainfall amounts with activity focused in locations with enhanced upslope flow and in areas with enhanced coastal convergence. The models and ensembles have better than average agreement so small differences can be handled using a consensus based approach. Schichtel