Add Yahoo as a preferred source to see more of our stories on Google. The polar vortex is a big swirl of cold air that usually stays locked over the Arctic, but when it weakens, the jet stream can dip ...

The polar vortex is a large area of low pressure and cold air surrounding both of the Earth’s poles. It ALWAYS exists near the poles, but weakens in summer and strengthens in winter. The term "vortex" ...

The cold snap headed our way this weekend is not The Polar Vortex. The Polar Vortex is a feature of the upper levels of the atmosphere. It is a high-level wind current that circulates around the polar ...

BUT LET’S TALK ABOUT THE POLAR VORTEX HERE. SO IT’S REALLY AN AREA OF COLD AIR THAT’S TRAPPED AROUND THE ARCTIC. AND IT’S JUST GOING TO IT USUALLY JUST STAYS PUT THERE. BUT WHEN IT WEAKENS, THAT JET ...