Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
818 AM EDT Fri Sep 08 2017

Valid 00Z Sat Sep 09 2017 - 00Z Sat Sep 16 2017

Trades will decrease after today as the surface and upper high
move northeastward away from the region. Precipitable water values
are forecast to remain near to below average into early next week
aside from brief rises especially over the Big Island. Models and
ensembles still indicate an upper low splitting off from a trough
moving into the Gulf of Alaska that will dip southward to near
30N/160W. Latest 06Z GFS and 00Z ECMWF agree well with their
ensemble means and a consensus blend should suffice, which would
keep the attendant surface boundary to the north of the region but
may allow moisture to increase over the state from the south.
Otherwise, generally a trade wind pattern will support light to
locally modest showers.


Fracasso