Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
354 AM EDT Fri Oct 24 2025

Valid 00Z Sat 25 Oct 2025 - 00Z Sat 01 Nov 2025

An upper high just north of Hawaii will weaken and move westward
with time as a weakness in the ridge/upper shortwave develops over
Hawaii around next Tuesday. This should help bring deeper ITCZ
moisture northward with some heavy rainfall potential for mainly
the southern islands by later this weekend and into next week.
Moderate to gusty easterly winds will weaken next week underneath
this trough. High pressure may begin to build back in over/north
of the islands by later next week. The guidance shows generally
good agreement on this overall pattern, but still with some
uncertainty in the details which affect QPF distribution and
amounts across the island chain.

Santorelli