Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
722 AM EST Sun Jan 07 2018

Valid 00Z Mon Jan 08 2018 - 00Z Mon Jan 15 2018

Models and ensembles continue to show overall a relatively quiet
weather pattern across Hawaii. The early part of the week will be
ideal underneath the influence of a strong ridge of high pressure.
Normal trades offer likely below normal moisture and limited
precipitation with perhaps only a few windward showers. By the
middle of the week, a rather pronounced amplified upper trough
over the pacific approaches from the north and west. As this
system passes through, it leaves behind an upper-level weakness
over the state. This may spell showers for the northwestern
islands with the surface front passing through and the weakness
with increasing southeasterly flow may yield showers for the
eastern portion of the Big Island. Then next weekend, additional
upper dynamics over the mid latitudes will help reinforce the
amplified regime north of the state. An associated frontal zone
may drop in from the north to only trigger isolated to scattered
showers across the state, as the deeper tropical moisture
returning north remains well east of the state.

Musher