Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
404 AM EDT Mon Nov 01 2021

Valid 00Z Tue Nov 02 2021 - 00Z Tue Nov 09 2021

Light and variable winds are expected to continue for the next
couple days in Hawaii due to a pattern disrupting the typical
trade winds--a strong surface low pressure system traversing
eastward well to the north of the state (around 40N latitude).
Given the weak overall winds, daytime sea breezes will dominate
and cause showers over interior areas where they set up, with
nighttime land breezes tending to clear out the clouds and rain.
By midweek onward, surface high pressure builds in north of the
state, causing a return to more typical easterly trade winds and
thus rain showers for windward and mountain areas. Meanwhile, a
cold front extending from the aforementioned surface low is
forecast to track slowly southward into the northern islands
(Kauai/Oahu) Tuesday and Wednesday, which is likely to enhance
moisture there through around Thursday and could increase shower
coverage. After that, easterly trades should stay moderate to
locally strong through the weekend, while there is a possibility
for increased moisture to reach the Big Island around
Friday-Saturday, though model guidance currently tends to keep it
south of the state.

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