Global warming strikes again? Polar vortex invasion in July

Global warming strikes again? Polar vortex invasion in July

[Ed. – Just don’t make a mockery of synoptic meteorology.  (Words to live by, come to think of it.)]

Call it the ghost of the polar vortex, the polar vortex sequel, or the polar vortex’s revenge. Meteorological purists may tell you it’s not a polar vortex at all. However you choose to refer to the looming weather pattern, unseasonably chilly air is headed for parts of the northern and northeastern U.S at the height of summer early next week.

Bearing a haunting resemblance to January’s brutally cold weather pattern, a deep pool of cool air from the Gulf of Alaska will plunge into the Great Lakes early next week and then ooze towards the East Coast. …

Highs in this region could well get stuck in the 50s and 60s – especially where there is considerable cloud cover. …

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Wednesday morning’s lows may drop into the  40s over a large part of the central U.S. Remember, this is July! …

Larry Cosgrove, an energy meteorologist, says  that while the looming cool air mass is “admittedly impressive”, calling it a polar vortex is hogwash.

It’s insane,” Cosgrove wrote on his Facebook page. “Poor wording combined with misunderstanding of the term make a mockery out of synoptic meteorology.”

Cosgrove’s argument is that the air mass doesn’t meet the “polar vortex” standard – its pressure isn’t low enough and the air isn’t sufficiently cold and truly Arctic in origin (i.e. not below freezing at 5,000 feet). “[On] TWO counts we fail to reach the standard for calling such an upper low a vortex,” he says. 

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