Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
823 AM EDT Thu Jul 18 2019

Valid 00Z Fri Jul 19 2019 - 00Z Fri Jul 26 2019

The guidance shows relatively good agreement in a strong upper
high to the northeast of Hawai'i weakening over the next week,
steering an upper low north of the archipelago Thursday/today into
Friday before settling west-southwest through the
Papahanaumokuakea National Marine Monument into mid next week.  A
compromise of the guidance with the mid- to upper-low settling
through the northwestern archipelago should sufficiently deal with
the detail issues noted.  The upper low appears to guide the
remains/moisture formerly associated with Tropical Depression 04E
to the south of the islands late Thursday/today into Friday, which
briefly increases moisture and shower activity.  Moisture
availability/shower activity should remain within typical trade
wind regime norms this weekend into Monday.  Another low-level
disturbance in the trade wind flow, within the inflow band of a
system well southwest of Mexico/south of California currently,
approaches the Island of Hawai'i next Tuesday and Wednesday, which
should enhance showers and trades mid next week.

Roth