Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 811 AM EDT Tue Jul 23 2019 Valid 00Z Wed Jul 24 2019 - 00Z Wed Jul 31 2019 Today's guidance offers fairly good agreement and continuity with the overall forecast through the next seven days. An inverted surface trough and upper low will continue to track away from the main islands early in the period. Associated areas of rainfall should soon give way to a typical windward/mountain shower pattern across the state as moderate to brisk trades persist into early next week. By this weekend an initial east-central Pacific surface high will be replaced by a strengthening upstream high that should reach 150-160W along 40N. Then guidance shows varying degrees of retrogression into next Tuesday, with differences appearing to have minimal impact on the trades over the islands. Behind the departing upper low, expect an upper ridge to cross the region through Thursday. A trailing upper weakness moving in from the east by Sunday-Tuesday may increase rainfall somewhat, though with precipitable water values remaining within a standard deviation of climatological values. Rausch