Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
727 AM EST Wed Dec 10 2014

Valid 00Z Thu Dec 11 2014 - 00Z Thu Dec 18 2014

The 10/00Z ECENS means and its deterministic run appeared to be in
good agreement ---with respect to the current Hawai'i forecast and
philosophy. The 10/00Z GEFS/GFS continues to be a slightly faster
solution for Hawai'i and downstream across Mainland.

A mid-latitude trough migrates into the Subtropics---and serves to
temporarily disrupt the Subtropical Ridge and trade winds. Behind
the front, another migratory surface ridge moves
eastward---supported by large-scale ridging aloft anchored in the
tropical southwestern Pacific. This stable ridge pattern freshens
the trades on Sunday (day4) and Monday (day5). Recommend an ECENS
approach after day 6---to anticipate another mid-latitude frontal
progression into the Subtropics.

Vojtesak