Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
301 AM EDT Sat Sep 25 2021

Valid 00Z Sun Sep 26 2021 - 00Z Sun Oct 03 2021

Increasing moisture is expected for this weekend as higher
precipitable water values stream into the southern islands,
associated with a surface trough tracking south of the state. Thus
showers are likely to become more widespread through Sunday
especially across windward areas of the Big Island, and winds
could become a little more breezy in the trough's vicinity.
Otherwise, easterly trade winds are forecast to persist over the
next several days as a mid/upper-level high is forecast to drift
slowly westward to the north of Hawaii through early next week,
while a high pressure system at the surface shifts slowly eastward
well north of the state. Generally quiet conditions are forecast
through much of the workweek, though by the latter part of the
week, moisture may increase once again as ridging eases a bit.

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