Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 813 AM EDT Tue Jun 20 2017 Valid 00Z Wed Jun 21 2017 - 00Z Wed Jun 28 2017 Elongated subtropical ridging is forecast to break on either side of Hawai'i starting later this week, strengthening around 165E and well east over the SW CONUS. This leaves the region in relative troughing aloft as heights fall back to average levels. Deep tropical moisture will stay south of 15N and also to the northwest as an initial trough lifts northeastward north of 40N. Models and ensembles (outside the 00Z Canadian) were in good agreement overall. Trades will increase over the weekend into early next week as the surface high moves eastward along 45N and strengthens into the weekend (about 1034mb). Fracasso