Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
733 AM EDT Tue Jun 26 2018

Valid 00Z Wed Jun 27 2018 - 00Z Wed Jul 04 2018

An upper level trough northeast of the islands today near 150w
drifts east to a position north of the islands over the weekend
into early next week.
The low level ridge with embedded closed highs drifts north of the
islands
later this week before drifting northeast this weekend and back
north of the islands early next week.

The persistence of the low level ridging results in a uniform
pressure gradient supporting moderate to brisk easterly trades the
balance of this week and into early next week. The 06Z GFS/GEFS
and 00Z ECMWF/ECMWF ensemble mean showed good agreement on the
forecast into next week and a blend of those solutions is
recommended.  Expect mostly windward showers through much of the
week, weekend, and early next week, with higher totals in areas
with stronger terrain gradients.

Petersen