Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
243 AM EDT Thu Jul 24 2025

Valid 00Z Fri 25 Jul 2025 - 00Z Fri 01 Aug 2025

The main subtropical surface high over the eastern Pacific will be
positioned well north of the Islands through the upcoming weekend,
and then the high redevelops northeast of the state by next 
Tuesday near 35N/140W. The state will be on the southern to
southwestern 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 Islands on Sunday 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