Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
334 AM EDT Sat Jun 12 2021

Valid 00Z Sun Jun 13 2021 - 00Z Sun Jun 20 2021

Guidance agrees that high pressure initially to the
north-northwest of the state will move eastward over the coming
days and settle over the East Pacific from about midweek onward. 
This high will maintain moderate trades most of the time with this
background flow supporting generally windward and mountain focus
for rainfall while other areas could see an occasional shower as
well.  Models/means still show below normal precipitable water
values continuing into the start of next week.  Moisture/rainfall
along a weakening front should get close to the northwestern
islands around next Tuesday-Wednesday.  The 00Z GFS differs from
other models/means in bringing this band of moisture somewhat
farther southward.  Another pocket of moisture may move
into/across the state from the east or southeast after midweek,
with a gradual lowering of precipitable water values from east to
west by next Saturday.  The combination of added moisture along
with the upper pattern over the state changing from a ridge to a
weakness/possible low should lead to an increasing trend for
rainfall coverage and amounts after Monday.

Rausch