Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
759 AM EDT Fri Jun 10 2016

Valid 00Z Sat Jun 11 2016 - 00Z Sat Jun 18 2016

Trades may slacken a bit Fri into Sat as high pressure north of
the state drifts eastward.  Then expect winds to become fairly
strong Sun into much of next week as trailing high pressure merges
with the leading high and the resulting stronger high retrogrades.
 Rainfall should primarily focus over windward locales though may
occasionally extend to other locations.  Models/ensembles are
consistent and agreeable with an upper level feature tracking
westward near/across the islands Sun-Tue.  During that time frame
this feature, which will be associated with precipitable water
values rising to the 1.50-1.75 inch range, should bring some areas
of enhanced activity.  Expect a drier trend by the latter half of
next week as the upper feature weakens/continues westward and
PWATs decrease. 

Toward the end of the period Thu-Fri there are still some
differences in amplitude of the upper trough extending toward the
state from the northeast.  00z/06z GFS runs are still a little
more amplified than other models/ensemble means but to a lesser
extent than yesterday.  Effect on the surface pattern is minimal
though the 06z GFS would yield slightly weaker trade winds than
consensus next Fri.

Rausch