Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
236 AM EDT Fri Jul 24 2020

Valid 00Z Sat Jul 25 2020 - 00Z Sat Aug 01 2020

...Tropical Cyclone Douglas forecast to reach Hawaii as a
weakening hurricane or tropical storm this weekend...

The most significant aspect of the forecast for Hawaii continues
to be what is currently Hurricane Douglas, moving westward across
the eastern/central Pacific. The latest track from the National
Hurricane Center brings Douglas across the Hawaiian islands on
Sunday as either a weakening hurricane or a strong tropical storm.
Models and ensembles continue to show some differences on the
exact track of Douglas, and even small variations in the track
over the next few days, either farther north or south, could have
significant effect on expected impacts for specific
locations/islands. Regardless, there is an increasing chance that
strong and gusty winds (tropical storm or hurricane force),
dangerous surf, and heavy rainfall could impact portions of Hawaii
beginning as early as Saturday night or Sunday morning. Several
inches of rainfall are possible, with heavy rains likely across
any islands that are close to the eventual track of the system.
Refer to the latest guidance from the National Hurricane Center
for the most up to date forecast information regarding Douglas.

Douglas should continue to gradually weaken as it moves away from
Hawaii by the early to middle part of next week. In the wake of
the system, expect a drier air mass across the state and the
resumption of a more typical trade wind pattern through next week.

Santorelli