Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
829 AM EDT Sat Aug 17 2019

Valid 00Z Sun Aug 18 2019 - 00Z Sun Aug 25 2019

The models indicate a low to mid level ridge building north of the
islands this weekend into early next week. Trades will be become
moderate to occasionally strong.  Expect terrain-enhanced showers
with slightly higher amounts in windward terrain of the big island
and Maui.

A tropical wave is forecast pass across the southern islands and
waters further south toward the middle of next week.  An increase
in precipitable water can be expected by Tuesday into Wednesday,
particularly on the big island.  This should result in more
showers, with a focus on the southern islands.

At the end of next week, the tropical wave is expected to pass
west of the islands. The moisture plume should depart with the
wave, with a drying trend aloft at the end of next week and down
tick in shower coverage/amounts. 

Petersen