Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
355 AM EDT Thu Oct 20 2022

Valid 00Z Fri Oct 21 2022 - 00Z Fri Oct 28 2022

A cold front has passed through the western islands of Hawaii and
is likely to stall there around Molokai or Maui before lifting
northward later in the day. Meanwhile, a mid-upper low to the
north of the state is forecast to drift west-southwest over the
next couple of days, lessening the typical inversion over the
state and allowing for deeper vertical cloud development. These
features will continue to produce showers especially over the
western islands as the front, eventually forecast to weaken into a
trough as the low pulls away, provides a focus for moisture over
the next day or two. Breezy winds currently coming in behind the
front are forecast to weaken as the front lifts away, with fairly
weak winds allowing for land and sea breezes to form on Friday. A
period of increased moisture is possible late Friday into Saturday
as moisture is pulled north from the ITCZ, which could increase
shower coverage in windward areas particularly for the Big Island,
where moisture is most likely to reach. By this weekend and
beyond, moderate to breezy trade wind flow should return as a
Pacific surface high builds to the north by early next week. Thus
more typical weather with some clouds and showers favoring
windward/mauka areas is forecast into much of next week.

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