Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
730 AM EST Mon Dec 19 2016

Valid 00Z Tue Dec 20 2016 - 00Z Tue Dec 27 2016

The latest models and ensembles continue to offer below normal
forecast spread and uncertainty for the Hawaiian weather pattern
this week. Satellite imagery shows a significant closed low dug
just to the southwest of the western islands. Blended precipitable
water loops show the core of 2"+ values is pooled offshore with
the low and along an old frontal boundary just south/southeast of
the Big Island. However, a winter storm warning remains in effect
over the Big Island for windy and snowy Mauna Loa and Mauna Kea
summits above 8000 feet.

The low will lose influence as it gradually weakens over the next
couple of days. Expect moisture and lingering rainfall potential
will still spread westward across the state during this period
before a drying trend and return of seasonal trades as high
pressure settles well northeast later week and then becomes
reinforced to the north of the state next weekend.

Schichtel