Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
800 AM EDT Sun Aug 06 2017

Valid 00Z Mon Aug 07 2017 - 00Z Mon Aug 14 2017

With good agreement from latest model and ensemble guidance,
expect trades to continue through the period.  Winds will trend
somewhat lighter over the next couple days as a mid-latitude front
briefly weakens the surface ridge to the north of the state.  Then
high pressure will rebuild and support stronger winds from midweek
through next weekend.  For most of the period the islands should
lie within an axis of below normal precipitable water values,
likely keeping generally windward focused showers on the light
side.  By next Sunday some guidance spread develops regarding the
northward extent of a pocket of greater deep moisture approaching
from the east-southeast.  00z/06z GFS runs have some of this
moisture reaching at least the Big Island while the 00z ECMWF is
more suppressed.  The 00z GEFS mean provides a reasonable
compromise given the model spread and typically low predictability
at the day 7 time frame.

Rausch