Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
201 AM EST Sun Dec 12 2021

Valid 00Z Mon Dec 13 2021 - 00Z Mon Dec 20 2021

A preferred composite of reasonably well clustered solutions from
latest guidance still shows high pressure establishing itself to
the north of Hawaii, with drier conditions and a more typical
trade wind pattern now over the state. This includes moderate to
breezy trades and some scattered windward and mountain showers,
but no widespread rainfall under upper ridging. By Tuesday and
Wednesday, a weakening cold front is expected to pass slowly
southward through the state. This may lead to a temporary period
of slightly enhanced moisture and some increase in showers. The
upper ridge slowly erodes mid-later week as a weakness aloft
settles over the islands. This may gradually act to pool more
shower fueling moisture, but longevity and effect/reformation
remains less certain into next weekend.

Schichtel