Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
426 AM EDT Thu Oct 8 2026

Valid 00Z Fri 09 Oct 2026 - 00Z Fri 16 Oct 2026

A strong mid to upper low to the northwest of the Island near 30N
165-170W is not expected to move appreciably Friday and Saturday
as it begins to weaken. Anomalous PW values are expected to be
drawn north on the eastern side of this closed low across across 
much of the state over the next few days, supporting locally heavy
rainfall amounts and potential for isolated flash flooding. While
there may be a brief break in the anomalous PW axis across the
Islands late Saturday into Sunday, another area of anomalous PW
values may move back across the state in the Monday to Thursday
time period. This will support increasing chances of locally heavy
rains and isolated flash flooding. 

Oravec