Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 811 AM EDT Thu Mar 28 2019 Valid 00Z Fri Mar 29 2019 - 00Z Fri Apr 05 2019 Persistent mean upper-level troughing across the north central Pacific through the next week will keep Hawaii on the southern periphery of a broad area of negative 500 hPa height anomalies, before upper ridging begins to expand across Hawaii by the middle to end of next week. A cold front is expected to stall across the eastern portion of the state Thu night. Models show the deepest moisture associated with this feature remaining mostly north of Hawaii, so any associated precipitation is not expected to be widespread. Light to moderate north-northeast winds should spread across the state in the wake of the front, becoming variable by Sun as the front washes out. Moisture may begin to increase a bit across the state by early next week. Model solutions continue to differ on the details, but they all agree that another relatively deep upper trough should amplify across the north central Pacific by Mon, perhaps drawing higher PWs (1.3-1.6 in.) north across the state. Next cold front should cross the state Mon night or Tue bringing further enhancement to shower activity, with surface high pressure building just north of the state in its wake. Lingering moisture from the weakening front light to moderate northeast flow should promote continued shower activity through the middle of next week for northeast slopes. Model/ensemble consensus is good that an upper-level ridge should begin to expand across the Central Pacific by the middle of next week, with heights beginning to rise across Hawaii by Wed-Thu. Ryan