Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 827 AM EDT Sat Jul 20 2019 Valid 00Z Sun Jul 21 2019 - 00Z Sun Jul 28 2019 A surge of deeper tropical moisture associated with a surface low pressure is forecast to lift northwestward through the 50th state late Sunday through Tuesday as a weakness aloft moves westward through the Papahanaumokuakea Marine National Monument. This has not been handled well in the models and the ensemble show a large amount of spread in how much rainfall may occur with the 06Z GFS and 00Z quite aggressive over the Big Island. Hi-res models do not yet run out far enough to ascertain the evolution and it may take at least another model cycle before the guidance agrees. From Wednesday onward, upper ridging will bridge across the state amid a more typical but breezy trade wind pattern that may include some brief surges in available moisture. Fracasso