Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
250 AM EDT Fri Apr 09 2021

Valid 00Z Sat Apr 10 2021 - 00Z Sat Apr 17 2021

Models and ensembles reasonably agree that the current regime of
below normal precipitable water values and moderate northeasterly
trades will give way to a modest rebound in moisture/showers and
lighter trades this weekend as a slow moving upper trough/low
spins to the northeast of Hawaii and as associated shortwave
energy drops into the islands. A favored guidance composite
suggests that mid-latitude flow amplification is expected to eject
the upper trough early-mid next week. This should yield another
period of drier conditions for the islands. Meanwhile, high
pressure building into the central Pacific will support a
strengthening of trades, returning remaining shower focus to
windward/mountain areas. Moisture/showers should increase later
next week as a front moves into the state from the northwest.  

Schichtel