Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
715 AM EST Wed Dec 12 2018

Valid 00Z Thu Dec 13 2018 - 00Z Thu Dec 20 2018

Several sub-tropical highs will pass to the north of the state
over the course of the week which will support strong trade winds
and mostly dry conditions. Guidance shows precipitable water
values generally between 0.50 to 0.80 inch through Wednesday, with
intermittent impulses of 1.0 to 1.2 inches. This should keep most
shower activity on the lighter half of the spectrum and favoring
the windward terrain, with some rainfall occasionally straying
over into leeward locations.

An upper-level trough and surface cold front is forecast to
approach the state by late Monday/Tuesday, which will lead to
significant weakening of the trades from Sunday into Monday, with
enhanced shower activities and winds shifting to more northerly
directions on Tuesday.

Campbell