Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
307 AM EDT Sat Jul 11 2026

Valid 00Z Sun 12 Jul 2026 - 00Z Sun 19 Jul 2026

No changes from the previous forecast as persistence in the 
pattern across the central and eastern Pacific will lead to a 
daily occurrence of easterly trades as broad surface ridging 
remains parked over the northern Pacific. PWAT anomalies will 
remain within +/- 1 standard deviations through the next 7-10 days
with undulations in the moisture through the period. With a 
generally consistent trade wind flow, seasonal trends within the 
convective field across the island chain will transpire with the 
heaviest precip focused on the windward side of each island with 
the highest impact area on the eastern slopes of Mauna Kea. 
Considering the presence of broad ridging and a stable upper 
pattern over the Pacific, look for this trend to continue even 
beyond the next 7 days as indicated within all 00z global ensemble
suites. 

Kleebauer