Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 730 AM EST Sat Nov 19 2016 Valid 00Z Sun Nov 20 2016 - 00Z Sun Nov 27 2016 The active mid-latitude pattern should keep the corridor of lower heights well north of the Hawai`ian island chain. Some of the guidance does hint at a weakness developing west of the region toward the International Dateline early next week. This is most evident in the 06Z GFS/GEFS mean solutions although the 00Z CMC hints at this idea as well. Regardless, this feature should remain well west of the island chain as mid-level heights continue to build southward from the mid-latitudes. At the surface, the initial dome of high pressure maintaining moderate trades will move eastward with an even stronger ridge building to the north and west. Most models favor trades into the 25 to 30 knot range by early/mid next week. These breezy conditions should persist for most of the week given the rather tight pressure gradient setting up. Looking at precipitation, while the higher precipitable water air remains south of Hawai`i, the continued threat for showers will persist, particularly as the trades increase in strength. The most organized threat should be in regions of upslope flow as well as along any mesoscale sea/land boundaries which aid in local enhanced lift. Rubin-Oster