Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 802 AM EDT Mon Oct 24 2016 Valid 00Z Tue Oct 25 2016 - 00Z Tue Nov 01 2016 Aside from details that are small enough in scale to have low predictability, guidance agrees fairly well on the pattern over the next seven days. Hawai'i will see moderate to brisk trades through the period with the stronger winds from Thursday onward. A surface high initially to the northwest/north of the islands will give way to a stronger high that should reach near 40N 160W on Thu and then weaken somewhat as it settles toward 30N and elongates east-west. Arrival of the stronger high will support the aforementioned strengthening of the trades. Expect most shower activity to be on the light side and focused over windward terrain, with precipitable water values tending to be below normal for most of the period. Within this drier than average regime there will be periodic fluctuations of PWATs pushed along by flow on the southwestern periphery of an eastern Pacific trough aloft. Most guidance suggests a weakness aloft will develop over the area by the weekend, possibly helping to enhance PWATs/rainfall a little compared to earlier days in the forecast period. Rausch