Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
735 AM EDT Sat Oct 06 2018

Valid 00Z Sun Oct 07 2018 - 00Z Sun Oct 14 2018

The current weaker than normal trades across the western portion
of the Islands in the wake of Walaka will re-strengthen this
weekend on the southeast side of the surface high centered near
40N 140-145W. The trailing high pw anomaly axis from Walaka will
remain well to the west of the Islands this period.  However...a
separate northwest to southeast oriented pw anomaly axis will
extend across the Islands through Monday. PW anomalies 2 to 3
standard deviations above the mean expected across the Big Island
and values 1+ standard deviations above the mean across the
remainder of the Island chain.   After this...lower pw values...
closer to average...will press southwestward across the Islands. 
Model consensus is for east southeast trades to persist through
most of the upcoming week period on the southeast side of the
surface high centered near 40N 140-145W.  This ridge..however...is
expected to weaken by 1200 UTC Thu with a corresponding weakening
of the easterly trades into the end of the forecast period. The
anomalous pw values early in the period across the Big Island may
support potential for heavier than normal windward showers through
the weekend...with more typical windward showers after this
through Thursday.  Lighter trades near the end of the forecast
period will support lessening windward precip chances for the
entire Islands.

Oravec