Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
740 AM EDT Thu May 30 2019

Valid 00Z Fri May 31 2019 - 00Z Fri Jun 07 2019

The models indicate a strong and persistent deep layer anticyclone
northeast of the islands that builds north of the islands the rest
of this week through the weekend, persisting into the middle of
next week, drifting slowly east next week.

Weak trade winds increase today and Friday as the high building
north of the islands increases the low level pressure gradient.
Moderate to occasionally strong trades then continue through the
weekend into the middle of next week.  With precipitable water
values near average for late May/early June, mainly windward/mauka
showers are expected with light to occasionally moderate amounts
over the next week.
With the persistent ridge, areas of drier air aloft will develop
so there will be potential for pockets of drier air to move across
the island during the early to middle portions of next week.
Models/ensembles remain in good agreement overall on the
height/pressure patterns.

Petersen