Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 830 AM EDT Thu Jun 21 2018 Valid 00Z Fri Jun 22 2018 - 00Z Fri Jun 29 2018 Models and ensembles remain in very good agreement in the Pacific with subtropical ridging stretched across 30N. This will maintain a typical trade wind pattern with scattered windward/mauka showers. The guidance indicates a weakness to pass westward through (or just north of) the region midweek next week with the 00Z ECMWF on the quicker side. The 00Z/06Z GFS lied just behind the ensemble means, which were in the middle and are the preferred timing. This will enhance the shower activity coincident with a rise in precipitable water values in an otherwise fairly quiet regime. Trades will increase next week as a surface high pressure drifts eastward along and just south of 40N. Fracasso