Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
727 AM EST Fri Jan 4 2019

Valid 00Z Sat Jan 5 2019 - 00Z Sat Jan 12 2019

Models and ensembles this morning are in relatively good agreement
over the central Pacific regarding the synoptic scale pattern. 
The surface high initially north of the state on Friday slowly
shifts east by Sunday as a cold front tries to sink southward from
the mid-latitudes, followed by another trough passing through
around the middle of next week.  The EC mean is a little stronger
with the surface high pressure building in over the Hawaii domain
by the end of the forecast period but similar with placement of
the high pressure centers. 

In terms of sensible weather, moisture near the trailing end of
the first cold front will increase the chance of showers across
the islands this weekend.  Thereafter, models have indicated a
southward trend for the second cold front approaching Hawaii next
week, keeping a good chance of showers across Hawaii beginning
Tuesday, particularly over the windward terrain.

Hamrick