Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
222 AM EDT Thu Mar 17 2022

Valid 00Z Fri Mar 18 2022 - 00Z Fri Mar 25 2022

Upper level ridging will be in place over the Hawaii domain
through about Saturday, before a large scale trough builds in
north of the state for the beginning of next week.  At the
surface, the subtropical surface high will generally move
eastward, with a col developing within the ridge across the
western Islands by Saturday.  A trailing cold front from the North
Pacific system will likely reach Oahu and Kauai by Monday night
based on the latest GEFS and ECENS means.

Steady easterly trades through late Saturday will support enhanced
showers across the typically favored terrain, mainly across the
Big Island.  The winds veer to the southeast as the front
approaches Sunday and into Monday, and gusty northeasterly flow
increases behind the boundary for early next week along with
slightly cooler temperatures.  Rain chances will also increase for
the central and western Islands ahead of the front, although
nothing major is currently expected.

Hamrick