Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
115 AM EST Wed Nov 11 2020

Valid 00Z Thu Nov 12 2020 - 00Z Thu Nov 19 2020

The closed upper west of Hawaii is forecast to slowly drift
westward and away from the state over the next few days while
weakening.  The upper ridge north of the state should gradually
move to the southeast and a col develops within the ridge axis.  
Meanwhile, a weak upper trough tracks just south of the Islands
for the end of the week and into the weekend.  By next Wednesday,
the GEFS mean is stronger with a deep trough that develops
northeast of the state and also brings a front closer to the state
than the EC mean.

In terms of sensible weather, the large high north of the state
through Friday will tend to keep the Trades strong with breezy to
windy conditions, and then lessen some by the weekend as the col
develops in the ridge.  Mainly terrain induced showers can be
expected for much of the forecast period, and it appears that the
heaviest rainfall should remain south of the Big Island based on
the latest model projections.

Hamrick