Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
825 AM EDT Sun Oct 07 2018

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

Overall, models agree on the large scale pattern as a the high
pressure centered over the eastern Pacific will build across the
islands over the next few days--with a surface trough to the west
of the islands. Later in the week, the ridge will weaken as a mid
level low pushes southward from the north Pacific. However, the
corresponding surface front will stay well north of Hawai'i.  As
such, the center of Walaka will continue moving farther north away
from the islands, leaving higher PW values in its wake.  This PW
axis will stay well west of the islands. However, some higher PW
anomalies could impact the Big Island and Maui today, bringing
heavier showers to these islands. Dry conditions will follow by
the beginning of the work week; as the surface high pressure
builds in, trade winds will begin to re-strengthen.  This will
encourage windward showers throughout the week. By the end of the
week and into the weekend, trade winds will become lighter which
will give way to lessening precipitation chances. 


Reinhart