Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
835 AM EDT Thu Mar 29 2018

Valid 00Z Fri Mar 30 2018 - 00Z Fri Apr 06 2018

East-southeasterly winds will prevail through the weekend as the
extreme southwest periphery of eastern Pacific high pressure.
Light shower activity will be possible for the Big Island, with
the windward side seeing a little enhancement.

A favored model composite indicates that a large, closed
upper-level low will slowly move east across the North Pacific;
which will result in the surface cold front approaching the
Islands from the northwest. An extensive axis of potentially heavy
rainfall will accompany the front likely impacting the Kauai and
Oahu by late this weekend and into the beginning of next week.

Regardless of exactly where the front aligns during the weekend
into early next week, there is reasonable model/ensemble agreement
with upstream energy supporting the approach of another front with
possible embedded waves by next Wednesday.  Low level winds should
turn more southwesterly and rainfall ahead of the front may reach
the far northwestern islands by Wednesday. 

Campbell