Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
338 AM EDT Thu Apr 08 2021

Valid 00Z Fri Apr 09 2021 - 00Z Fri Apr 16 2021

Most guidance continues to offer similar ideas through the
forecast period.  The current regime of below normal precipitable
water values and moderate to brisk northeasterly trades will give
way to a rebound in moisture (though perhaps only toward normal
values) and lighter trades this weekend as shortwave energy drops
south toward and over the main islands.  Rainfall from showers may
increase somewhat while there could be some sea/land breeze
influence when trades are weakest.  Expect passage of the upper
trough on Monday to yield another period of drier conditions that
should extend into midweek.  Meanwhile high pressure building into
the central Pacific will support a steady strengthening of trades,
returning shower focus more to windward/mountain areas.  After
Wednesday moisture may increase somewhat as a front approaches
from the north.  

Rausch