Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
353 AM EDT Wed Jun 25 2025

Valid 00Z Thu 26 Jun 2025 - 00Z Thu 03 Jul 2025

Above normal moisture is in place across much of Hawaii 
Wednesday, while a weak upper trough aloft allows for a raised 
inversion. This will equate to a wet trade wind pattern as 
moderate to breezy trades are in place. Showers should be passing 
across most islands but linger for Kauai where the moisture and 
troughing are maximized. Into late week, moderate trades should 
continue but drier conditions are expected. An upper ridge will 
drift over the eastern islands and eventually build to the west by
this weekend. Thus showers should decrease but a few showers over
windward and mauka areas are still possible. Will continue to 
monitor the pattern into next week, but currently it appears that 
early to midweek another upper trough axis could develop northwest
of the islands, while the surface pressure gradient could weaken 
and decrease trades, especially for Kauai/Oahu.

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