Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 802 AM EDT Wed Mar 25 2015 Valid 00Z Thu Mar 26 2015 - 00Z Thu Apr 02 2015 The 25/00Z forecast cycle did not waver much from current local forecast package through day 2. The surface high migrating along 30N between 26/12Z and 27/12Z is a transitory feature of the synoptic pattern---surging into the Mainland as a deep surface low in the southwest Gulf of Alaska. The sub-980mb cyclone and its central pressure near 50N 155W amplifies the low-level flow across the central Pacific around the 28/00Z time frame. The 25/00Z deterministic GFS/ECMWF equally handle the scenario---though the qpf forecasts do differ enough between 26/12Z and 27/12Z to make mention---the 25/00Z GFS is a much wetter solution versus the ECMWF over the eastern half of the state. Medium Range--- Flow pattern across the Pacific---especially the northeast Pacific---has come into better focus---with the 25/00Z guidance resolving some of the shortwave details between day 3 and day 5. A blend of the 25/00Z ECENS, NAEFS and GEFS means beyond day 5 should handle the next mid-latitude trough approaching Hawai'i from the northwest---between day 5-6. Vojtesak