Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
344 AM EDT Sat Apr 08 2023

Valid 00Z Sun Apr 09 2023 - 00Z Sun Apr 16 2023

An upper trough is forecast atop Hawaii over the weekend,
providing a slight increase in instability for more clouds and
possibly shower coverage. Meanwhile at the surface, the pressure
gradient is likely to weaken a bit as a front approaches but
likely remains north of Hawaii. This will allow for trade winds to
decrease slightly as well, but still serve to focus showers over
favored windward areas with a few downpours possible. The core of
heaviest rainfall still looks to remain southwest of the state
where the highest moisture anomalies are expected.

For next week, another reasonably strong surface high looks to
shift eastward well north of Hawaii (near 40N) and will provide
for an increase in easterly trades to at least breezy levels
likely around Monday and lasting through around Thursday. Showers
mainly in windward areas can be expected, but some may make it to
leeward areas given the strength of the winds. Trades are forecast
to decrease some by late next week as the high shifts east and
weakens.

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