Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 834 AM EDT Tue Jul 17 2018 Valid 00Z Wed Jul 18 2018 - 00Z Wed Jul 25 2018 An upper level circulation will settle into northwest of the islands between two ridges and this pattern will persist for several days. Surface high pressure will remain present to northwest and northeast, which should favor moderate mean trades underneath into the state. Favored model trends show a drier and more stable airmass early in the period; however there will be an increase in easterly waves that may increase the chance for showers andadditional tropical moisture by the weekend. Campbell