Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
207 AM EDT Fri Jul 10 2026

Valid 00Z Sat 11 Jul 2026 - 00Z Sat 18 Jul 2026

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