A forecast map from the National Weather Service (NWS) Climate Prediction Center warns that much of the central, eastern, and southern U.S. could be hit by another wave frigid Arctic air later ...

A powerful pattern is setting the stage for an amplified jet stream that will shunt cold air south, and the roots of this shift lie thousands of kilometres away in Japan. This January, the Arctic ...

Now when this happens, those areas in the middle latitudes, including the U.S., generally experience a west-to-east air flow and cool ... air floods north into the Arctic and cooler air fills ...