Sentences with phrase «plunge southward»

When the Arctic Oscillation is negative, cold Arctic air masses tend to plunge southward and into the U.S., spawning snowstorms and leading to cooler than average conditions.

Deep troughs act like an open refrigerator door, allowing frigid Arctic air to plunge southward, bringing misery to areas ill - prepared to handle it.

Not exact matches

And when that happens, a burst of frigid air swings southward behind the jet stream, causing temperatures to plunge and sometimes bringing heavy snow with it.

And the very same jet stream configuration responsible for the southward plunging Arctic air mass chilling the eastern United States is associated further to the west with a «ridge» of high pressure that is pushing the warm, moist subtropical Pacific air masses that would normally deliver plentiful rainfall (and snowpack) to California well to the north.