Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
816 AM EDT Sun Apr 2 2017

Valid 00Z Mon Apr 3 2017 - 00Z Mon Apr 10 2017

The guidance is in good agreement over the Hawaii domain through
most of the forecast period, with both the EC mean and GEFS mean
indicating a synoptic upper level ridge progressing slowly
eastward across the region, with the GEFS mean indicating a
slightly weaker ridge by next Saturday.  At the surface, the
ensemble means are in good agreement that the surface high ridge
axis should remain in place between 25 and 30 degrees north. 
Farther to the north near 40 degrees north, a surface low and
trailing cold front passes by on Monday without any significant
affect on Hawaii, except for some increased northerly ocean
swells.  Another storm system passes well to the north on
Wednesday, with the trailing southern portion of the front perhaps
weakening the trade winds some for the second half of next week. 
The GEFS and EC means are closer on timing compared to their
respective runs yesterday.  The typical trade wind induced showers
across the favored terrain should prevail for the upcoming week,
with the aforementioned storm systems appearing to have a
negligible impact on expected precipitation based on model QPF
output.

Hamrick