North Pacific jet stream is screaming (200-knots) as zonal [West - East] as you can get around 30°-35°N latitude. Midlatitude storm track is just north of the jet & will feed upon the kinetic energy + warm, moist subtropical air to sling atmospheric rivers at California. pic.twitter.com/BKSPv7LWoh

— Ryan Maue (@RyanMaue) December 29, 2022