Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 830 AM EDT Sun May 06 2018 Valid 00Z Mon May 07 2018 - 00Z Mon May 14 2018 Guidance and latest observational data shows a frontal boundary trailing southward across the central Pacific from a deep closed low now passing well north of the state. The weakening front is drifting eastward across the islands along with an enhanced plume of moisture that is fueling showers. Coverage and amounts of rain is declining as the front moves east with departure of the main supporting upper trough and onset of post-frontal drier air advection, but some low/trough energy aloft splits off to loom just to the southwest of the state. A favored model and ensemble composite indicates that high pressure builds and bridges to the north of the islands through early-mid week, so as the remnant frontal boundary stalls just south and east of the islands, flow will become increasingly easterly with return of moderate to brisk trade winds. Lingering deeper moisture near the Big Island would provide potential for some locally enhanced windward showers. Moisture and showers are expected to spread back over the central then western islands mid-later week as moderating trades tend to veer in response to approaching mid-upper level troughing and height falls from the northwest. Trades may increase again next weekend as new high pressure builds bridges to the north of the state. Schichtel