The northern branch of the jet stream features a trough over western Alaska. A flat ridge over eastern Alaska and northwest Canada. A trough over north-central and northeast Canada. And some weak ridging over Greenland. This is a warm/hot pattern for western Canada, mild/cool in the east. The southern branch of the jet features a trough in the western Gulf of Alaska. A ridge over the eastern Gulf of Alaska. A trough over the northwest U.S. A strong subtropical ridge centered over the Rockies and Plains. And a trough over southeast Canada and the northeast U.S.