Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
325 AM EDT Sat Sep 20 2025

Valid 00Z Sun 21 Sep 2025 - 00Z Sun 28 Sep 2025

Surface high pressure and upper ridging over/north of Hawaii will
maintain a fairly typical trade wind pattern into about early next
week. Weak troughing over the state may bring a period of 
rain and thunderstorm chances this weekend. There is good 
agreement in the guidance that a cutoff low will advance southward
towards and possible over Hawaii mid to late next week which 
looks to increase moisture and rainfall chances across the island
chain again. 


Santorelli