The Alaska ridge signal frequently associates with cold air into eastern North America, but in this case, the cold trough cuts off in the Western US, and a warm ridge forms in the east.— Paul Roundy (@PaulRoundy1) December 21, 2023
The Alaska ridge signal frequently associates with cold air into eastern North America, but in this case, the cold trough cuts off in the Western US, and a warm ridge forms in the east.