Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
811 AM EDT Mon Jun 03 2019

Valid 00Z Tue Jun 04 2019 - 00Z Tue Jun 11 2019

Today's guidance continues to show similar ideas for the forecast
over the next seven days.  The primary feature of note will be a
weak but consolidating shortwave (possibly containing an upper low
depending on the precise level examined) expected to approach and
cross the main islands Tuesday through Thursday.  This shortwave
will bring the potential for some locally heavy showers and
possibly a few thunderstorms with the increased instability, and
models/means agree with the corresponding increase of deep
moisture.  There will be a drying trend from late this week into
early next week as heights aloft gradually rise and precipitable
water values decrease.  However by next weekend multi-day trends
still suggest that upper ridging to the west will not build
eastward quite as fast as the more extreme side of the spread (00Z
CMC/CMC mean).

Mid-latitude high pressure tracking toward the eastern Pacific
will support moderate to brisk trades during the first half of the
week.  Then trades will trend lighter as the high settles into its
destination and a decelerating front comes into the picture well
northwest of the islands.  Trades may be light enough to allow for
some land/sea breeze shower focus late week into the weekend. 
From late weekend into early next week guidance still suggests the
eastern Pacific high may gradually expand southwestward leading to
a modest rebound in trade strength.

Rausch