Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
707 AM EST Sun Dec 30 2018

Valid 00Z Mon Dec 31 2018 - 00Z Mon Jan 07 2019

A decaying frontal boundary across Hawaii could still bring a few
showers to the state through Sun night before the boundary washes
out and the deep moisture shifts south and west of the state.
Models and ensembles continue to show strong consensus that an
upper-level ridge axis will build across the state from Mon onward
through the rest of the week. The ridge will bring a resumption of
breezy trades in the 20-25 kt range and an abundant supply of dry
air, with PWs falling well below 1 inch, resulting in only very
isolated/light windward showers. A couple frontal boundaries
originating in a more active flow regime across the North Pacific
will attempt to move south toward Hawaii, one Thu-Fri and perhaps
another next weekend, but models show these washing out north of
Hawaii with little or no sensible weather impacts on the state.


Ryan