Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
757 AM EDT Tue Jun 09 2015

Valid 00Z Wed Jun 10 2015 - 00Z Wed Jun 17 2015

Latest model/ensemble mean runs display relatively good agreement
aside from minor detail differences through the period.  A
recently formed upper low to the northeast of the state should
reach its closest proximity around early Thu near 26N 149W.  This
feature will then eject quickly northward as another upper low
settles in to the north as part of an increasingly blocky
central/eastern Pacific pattern.  This second upper low may open
up by early next week.

Moderate trades should weaken by the latter half of the week as
initial high pressure to the north tracks eastward and an inverted
surface trough forms just north of the region in response to the
second upper low.  Expect trades to remain in the lighter half of
the spectrum for the rest of the period.  This level of trade flow
may lead to a combination of terrain-focused and land/sea breeze
activity.  Most showers should be fairly light with precipitable
water values hovering around or a little below 1.25 inches into
the weekend, with a modest increase in rainfall possible Sun-Mon
as PWATs are forecast to rise toward 1.25-1.50 inches near the Big
Island.

Rausch