The PDO appears to flipping more positive at the moment. Rapid cooling of the waters east of Japan is part of the canonical +PDO signal. You can see waters by NW North America warming too - also part of it. +PDO is a wet signal for the SW if it develops. pic.twitter.com/LeFuC6OcvI

— RaindanceWX (@raindancewx) August 14, 2021