Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
311 AM EDT Thu Sep 15 2022

Valid 00Z Fri Sep 16 2022 - 00Z Fri Sep 23 2022

Lighter trade winds are expected through the end of the week as a
front dissipates into a trough north of the state and causes a
weaker pressure gradient. This will allow for some land and sea
breezes to form. Near normal to above normal moisture levels
should prevail today, along with troughing aloft that would lift
inversion heights. Thus some showers are possible following
typical land/sea breeze patterns, namely over windward slopes and
coasts at night and interior and leeward areas during the
afternoon, with perhaps even isolated thunderstorms for the Big
Island. By early next week, trades are expected to strengthen
again to around moderate levels. Additionally, model guidance
shows moisture could increase around Sunday and increase coverage
of clouds and showers as this moisture plume travels east to west
across the state. After that, drier trades are expected as an
upper high/ridge could sneak atop Hawaii and suppress moisture
availability.

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