Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
213 AM EDT Tue Mar 30 2021

Valid 00Z Wed Mar 31 2021 - 00Z Wed Apr 7 2021

The upper low and accompanying surface low situated near 30N/170W
Tuesday morning is forecast to continue slowly drifting westward
and away from Hawaii through Friday, with the associated rainfall
remaining well west of the northwestern Islands.  The large
surface high that will initially be north of that disturbance will
slowly move eastward along 40N and be north of the state this
weekend.  Aloft, a pattern almost resembling an omega block will
likely be in place across the North Pacific through early next
week, with a trough axis situated well to the northeast of the
state. 

In terms of sensible weather, a typical trade wind pattern should
prevail for much of the forecast period.  Easterly flow of 15-25
mph with higher gusts will be likely through Thursday, and then
backing slightly to the east-northeast beyond that as the strong
surface high builds in to the north, and the trades perhaps
becoming slightly stronger.  The greatest coverage of showers are
expected across the windward terrain of the Big Island. 

Hamrick