Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
729 AM EDT Tue Jun 21 2016

Valid 00Z Wed Jun 22 2016 - 00Z Wed Jun 29 2016

The current Hawai'i forecast seems to be on track based on the
most recent model guidance.

The expansive surface ridge covering the majority of the eastern
Pacific will weaken through time. And over the weekend (day4-5),
the 21/00Z deterministic ECMWF/GFS reasonable depict the sequence
of events leading up to this scenario. A broad trough forms in the
Gulf of Alaska and incorporates/merges with a cutoff low currently
invof 30N 140W.

Once the eastern Pacific mid-level longwave trough between
140W-150W migrates into the North American (around day 7), the
expansive surface ridge and moderate-to-strong tradewind
circulation returns to the Subtropics (~20N latitude).

Vojtesak