Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
829 AM EDT Mon May 07 2018

Valid 00Z Tue May 08 2018 - 00Z Tue May 15 2018

Guidance and latest observational data shows a lingering frontal
boundary trailing to near the Big Island from a deep closed low
now well northeast of the state. A plume of deep moisture along
this front also extends just to the south of the state. A favored
model and ensemble composite indicates that high pressure will
build and bridge to the north of the islands into mid week, so
flow is becoming increasingly easterly with return of moderate to
brisk trade winds. Lingering deeper moisture near the Big Island
would provide potential for some locally enhanced windward
showers. Moisture and showers are expected to spread back over the
central then western islands mid-later week as moderating trades
tend to veer in response to approaching mid-upper level troughing
and height falls from the northwest. Trades may increase again
next weekend as new high pressure builds bridges to the north of
the state.

Schichtel