Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
809 AM EDT Wed May 29 2019

Valid 00Z Thu May 30 2019 - 00Z Thu Jun 06 2019

The models indicate a strong and persistent deep layer anticyclone
northeast of the islands that builds north of the islands the
latter half of this week through the weekend, persisting into
early next week.

Weak trade winds today start to increase Thursday and Friday as
the high building north of the islands increases the low level
pressure gradient. Moderate trades then continue through the
weekend into early 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