Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
758 AM EDT Thu Jun 18 2015

Valid 00Z Fri Jun 19 2015 - 00Z Fri Jun 26 2015

Latest model and ensemble guidance agrees well for the expected
pattern through the next seven days.  On average trades should be
of moderate strength, perhaps weakening slightly during the
Sat-Mon time frame as flow around an upper ridge to the northwest
helps to push a weak front into the area.  This feature should
briefly increase precipitable water values to or above 1.50 inches
over the northwestern islands and possibly bring modest
enhancement to what should be generally light to moderate windward
shower activity.  After Mon moderate trades should resume as a
central Pacific surface high elongates eastward.  There may be a
break in the surface ridge by day 7 Thu due to a front extending
from a northern Pacific system but current models/ensembles expect
any influence to remain north of the islands.

Rausch