Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
716 AM EST Wed Nov 28 2018

Valid 00Z Thu Nov 29 2018 - 00Z Thu Dec 06 2018

Strong upper-level ridging (with 500 mb heights as much as 2.5
standard deviations above normal), along with breezy trade winds,
will weaken over Hawaii ahead of an anomalous trough/upper low and
attendant cold front moving in by the end of the week. The cold
front will usher in moist and unstable air resulting in increased
shower activity with locally heavy rainfall possible through
Saturday. Isolated thunderstorms cannot be ruled out either. The
front will clear the island chain from northwest to southeast as
the upper trough slides into the eastern Pacific. After Saturday,
heights are expected to build back again with breezy trades
resuming and veering back to east-northeasterly and continuing
through the middle of next week. Despite the normal differences in
the details, models show decent agreement on the overall synoptic
pattern over Hawaii for the next week.

Santorelli