The magnitude of this Pacific Trough signal is astonishing. Ensemble mean PT index at +1.5 sigma at a 2-week lead is wild.
— Dr Simon Lee (@SimonLeeWx) December 9, 2023
The PT regime is associated with continent-wide warmth 🌡️ & increased precipitation/atmospheric rivers impacting the west coast 🌧️https://t.co/oUo3v2w8al pic.twitter.com/OEOCrLrs3R