Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
335 AM EDT Wed Jul 23 2025

Valid 00Z Thu 24 Jul 2025 - 00Z Thu 31 Jul 2025

The main subtropical surface high over the eastern Pacific will be
positioned well north of the Islands this week, and then the high
redevelops northeast of the state by next Wednesday. The state 
will be on the southern periphery of this high, and this will 
keep a general easterly low level flow in place, with some ENE to
ESE component at times through the period. The ensemble means are
in good synoptic scale agreement on the overall pattern.

In terms of rainfall prospects, the normal trade wind induced 
showers can be expected through the remainder of the week with no 
major rainfall events expected. However, there may be a slight
increase in showers across the Big Island over the weekend as a
weak tropical wave approaches from the east, and another surge of
moisture will likely pass south of the Islands around the middle 
of next week.

Hamrick