Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
736 AM EDT Sat May 20 2017

Valid 00Z Sun May 21 2017 - 00Z Sun May 28 2017

On Sunday-Monday a front will move from west to east across the
waters north of the islands.  An inverted trough progresses across
the islands in tandem with the front. The front will dissipate
with time as high pressure builds north of Hawaii and the trades
refresh to moderate levels in the middle of the week. From Monday
through Thu expect more windward shower focus in eastern coastal
areas and where upslope flow occurs in terrain.

The high weakens and retreats to the east late in the week as a
deep layer trough builds across the region.
The 06z GFS and 00Z gefs mean are in good alignment with the 00z
ECMWF and ECMWF ensemble mean.   Next Friday and Saturday the weak
flow means scattered showers may also occur with the sea breeze.

Petersen