Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 812 AM EDT Thu Oct 13 2016 Valid 00Z Fri Oct 14 2016 - 00Z Fri Oct 21 2016 Upper high to the northwest of the island chain will drift eastward and maintain its axis over Hawai'i by next week. Surface high will be reinforced from the northwest by this weekend and push eastward past 150W Monday. This should increase trades a bit until early next week. Although deep moisture will stay south of the area, a tropical wave is still forecast to approach the region from the east next week on Tuesday into Wednesday which will increase the chance of showers. The GFS and ECMWF ensembles show a more similar rise in PW values compared to yesterday. Otherwise, generally light windward showers are expected. Fracasso