Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 829 AM EDT Wed Sep 05 2018 Valid 00Z Thu Sep 06 2018 - 00Z Thu Sep 13 2018 The initial threat approaching the Hawai`ian island chain will be what is currently Hurricane Norman. However, the latest forecast track allows this tropical cyclone to gain latitude as it nears 150W longitude later today. There should be a brief period of enhanced wind fields along the eastern extent of the Big Island and Maui. Thereafter, the state should briefly sit within the break in the mid-level subtropical ridge before re-establishing itself to commence the weekend. At this point the surface winds should calm given weakening pressure gradients. Gradually the focus will shift toward Hurricane Olivia as it generally exhibits a west-northwestward movement the next week. While in a more diminished state, models seem to show what remains of Olivia reaching the Big Island by either next Tuesday or Wednesday. The 00Z ECMWF is a day ahead of the 06Z GFS with ensemble spaghetti plots depicting such differences. Meanwhile, the 00Z CMC and its ensembles show literally nothing which is surprising given the model's tendency to overdevelop tropical cyclones. Depending on the state of Olivia, some enhancement in the northerly winds are likely in advance of the system. Regarding rainfall chances, it should remain intermittently dry the next several days with the best threat occurring next week in response to Olivia's approach. Rubin-Oster