Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
239 AM EST Wed Jan 13 2021

Valid 00Z Thu Jan 14 2021 - 00Z Thu Jan 21 2021

A couple of weak fronts moving into the region late this week will
provide brief disruptions to the trades and increased showery
activity. By late Sunday, there continues to be good agreement
that a more defined/amplified shortwave will approach Hawaii,
driving a strong cold front southward, which reaches Kauai around
Sunday-Monday. Both the operational GFS and ECMWF continue to show
enhanced, possibly moderate in intensity, rainfall associated with
this front. Guidance also indicates troughing/low pressure
lingering over the islands into the middle of next week, which may
help draw deeper tropical moisture northward. The latest models
show the heaviest precip just east of the state, but it's
important to note there remains a lot of uncertainty in the
details/timing of this feature and plenty of time left to resolve
specifics.

Santorelli