Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
236 AM EST Wed Dec 08 2021

Valid 00Z Thu Dec 09 2021 - 00Z Thu Dec 16 2021

Hawaii's weather is beginning to quiet down after a kona low
caused rainfall totals of over a foot and widespread flooding
impacts across the state. Some additional showers are possible
through Tuesday night for Kauai as the moisture plume lingers, but
overall the heaviest rainfall is over. As the kona low shifts
westward, high pressure will establish itself to the north of
Hawaii, drying out the pattern and leading to a more typical trade
wind pattern. This will mean breezy easterly winds and the
possibility of scattered windward and mountain showers, but no
widespread rainfall expected. By around Monday-Wednesday, model
guidance (including the latest GFS and ECMWF runs and the EC
ensemble mean) show the possibility of a weak cold front slowly
passing through the state. This could lead to a temporary period
of slightly enhanced moisture in the front's vicinity, but at this
time does not appear to significantly enhance rainfall activity.

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