Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 703 AM EST Thu Dec 06 2018 Valid 00Z Fri Dec 07 2018 - 00Z Fri Dec 14 2018 Models and ensemble means show better than average agreement regarding the overall pattern evolution through next Thursday, favoring a consensus approach for specifics. Sheared shortwave energy on the extreme southern periphery of the westerlies will help to push a weakening front southeastward toward the main islands over the next couple days. Associated moisture does not appear particularly great, with precipitable water values likely to remain a little below climatology, but could still provide some enhancement to shower activity. Eastward progression of trailing surface high pressure will steadily strengthen the trade flow with fairly strong winds likely by late weekend into early next week. The pressure gradient may relax a bit around midweek as the surface high continues into the eastern Pacific but then another high forecast to track north of the state by next Thursday should maintain brisk trades. Expect primary focus for showers to be over windward terrain with rainfall totals constrained somewhat by precipitable water values tending to remain somewhat below normal for this time of year. Rausch