
The logo of the United States National Weather Service. The source page states that is not an “official” version but it looks very close to the version used on NWS’s website. (Photo credit: Wikipedia)
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