The term “polar vortex” has crept back into the news as a mass of cooler air threatens to descend on the Great Lakes and farther south. But experts are dismissing that talk as so much, uh, hot air.
If the long-range forecasts hold true — and they often don’t — it’ll be a bit cooler than normal and you won’t have to run the air conditioner. That’s about it.
“I would shy away from using the term polar vortex,” said Tim Axford, a National Weather Service meteorologist in Pittsburgh. “Over the past six months that term has been used a lot and gotten a lot of media buzz for something that happens quite often.”
What may happen is a dip in the air currents that will send cooler air from Canada, giving us a few days of high and low temperatures about 10 degrees below normal, Mr. Axford said.
Read more: http://www.post-gazette.com/local/region/2014/07/12/Weather-will-be-a-bit-cooler-next-week-not-nowhere-near-icy/stories/201407120015#ixzz37GuhWCLC