Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 417 AM EDT Tue Sep 15 2020 Valid 00Z Wed Sep 16 2020 - 00Z Wed Sep 23 2020 A favored composite of reasonably well clustered models and ensembles shows light to moderate island trades today into Thursday. Below normal precipitable water values should favor mostly light shower activity, mainly over windward and mountain areas. Unsettling upper trough development over the state may pull some deeper tropical moisture to skirt the southern tier of the islands Friday into Saturday. Afterwards, expect gradually rising heights and strengthening trade flow from the weekend into early next week as high pressure builds northeast of the state. Schichtel