Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
828 AM EDT Thu Sep 07 2017

Valid 00Z Fri Sep 08 2017 - 00Z Fri Sep 15 2017

The strong upper high to the north of the region is forecast to
break down and split east-west over the central Pacific as
troughing digs to the north/northwest of Hawai'i next week. Models
and ensembles generally keep the upper low west of 160W along with
any moisture increase, but it is close enough that a shift
eastward could bring more widespread modest rain to the region
next Wed/Thu.

Trades may increase a bit Friday before decreasing again this
weekend and especially into next week as the sfc high drifts away
and a cold front drops southward to 30N late Monday. Mainly light
windward showers are expected through the duration of the period
as the region remains in between deeper tropical moisture near the
ITCZ and the boundary to the north, though the Big Island may see
a better chance of showers as pockets of moisture pass through.


Fracasso