Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
809 AM EDT Mon Apr 03 2017

Valid 00Z Tue Apr 04 2017 - 00Z Tue Apr 11 2017

In most respects the latest guidance agrees well over the next
seven days.  An east-west ridge of high pressure to the north of
the state will support moderate to brisk trades through the first
half of the week with perhaps a slight weakening around
Wednesday-Thursday.  Then toward Friday-Saturday a stronger high
center moving eastward to the north of 30N latitude may support a
strengthening of trades.  Expect trades to take on a more
southeasterly orientation during the weekend into early next week
as the high continues into the eastern Pacific and a front begins
to approach northwest of the islands.  There are some modest
differences with the late period front to the northwest but the
overwhelming majority of guidance keeps associated moisture beyond
the northwestern islands.  Most shower activity will be on the
light side through the period and primarily focused over windward
terrain.  Precipitable water values should be around or a little
below an inch into Friday-Saturday and then increase to the 1-1.25
inch range.  A ridge aloft initially west of the state will move
overhead Thursday-Friday and then continue to the east of the
region as it weakens.

Rausch