Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
342 AM EDT Sun Oct 31 2021

Valid 00Z Mon Nov 01 2021 - 00Z Mon Nov 08 2021

For the first half of the week, light and variable winds are
expected over 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). Meanwhile,
weak fronts are expected to dissipate just to the north of the
state over the next couple of days, which could enhance moisture
somewhat, especially over Kauai and Oahu. Given the weak overall
winds, daytime sea breezes will dominate and cause showers over
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
moderate to locally strong easterly trade winds and thus rain
showers for windward and mountain areas. Then we will continue to
monitor the possibility of enhanced moisture coming into Hawaii by
late week into the weekend, which still has quite a bit of
variability among model guidance.

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