For North America east of the Rockies, the regime evolution Greenland High (widespread cold) to Pacific Trough (widespread warmth) to Alaskan Ridge (widespread cold) would be quite the double "weather whiplash" if it does play out this way. https://t.co/oUo3v2w8al pic.twitter.com/O0ANMDnCaj

— Dr Simon Lee (@SimonLeeWx) January 16, 2024