"From Cold Snap to January Thaw: Weather Pattern Shift Brings Wild Temperature Swing to US"

A major weather pattern change is set to bring a significant swing in temperatures across the US next week, with above-average temperatures forecast for the entire Lower 48. The shift is driven by a change in the jet stream's positioning, which will trap cold air in Canada and allow warm air from the tropics to surge northward into the US. This will result in milder conditions and drastic temperature changes, with some areas experiencing 40- to 50-degree swings from this week's cold to next week's unseasonable warmth. The above-average warmth is expected to persist through the end of January, according to the Climate Prediction Center.