Get ready for some cold weather to hit the Great Lakes and Northeast as what is being described as a “Poor Man’s Polar Vortex” is projected to sweep down through the great lakes next week.

Polar Vortex

 

Polar vortex to cause unseasonably chilly air

While meteorological purists may tell you it’s not a polar vortex at all, nonetheless unseasonably chilly air, from twenty to thirty degrees below normal, is on a path to disrupt the precious summer warmth being enjoyed in northern and northeastern parts of US.  Highs in the Great Lakes and upper Midwest could reach only into the 50s and 60s next week, while lows could dip into the 40s, just above freezing.  Remember, this is July, typically the warmest month of the year.

The disruptive heart of the chilly airmass will probably just miss the East Coast, say forecasters, but temperatures could drop 10 degrees below normal.  Areas in the southern East Coast, such as Washington DC, may enjoy the weather, keeping temps in the 70s later next week, with widespread lows in the 50s near the coast and down to the 40s in the mountains.

The chilly temperatures are expected to last only a few days and could break records for the cold, particularly around the Great Lakes, where water temperatures have yet to recover from a frozen  winter. Ice was still found on Lake Superior into June, an unusual situation.

Polar vortex: Odd weather could be Japan’s typhoon Neoguri

What’s behind the odd weather could be typhoon Neoguri in Japan, temporally pushing the jet stream from the north pole lower down through the Great Lakes.

Polar Vortex

 

“The large and powerful nature of this storm (typhoon Neoguri) has set in motion a chain-reaction set of events that will dramatically alter the path of the jet stream and affect weather patterns across the entire Northern Hemisphere next week,” said the Weather Underground’s Jeff Masters.  “Neoguri will cause an acceleration of the North Pacific jet stream, causing a large amount of warm, moist tropical air to push over the North Pacific. This will amplify a trough low pressure over Alaska, causing a ripple effect in the jet stream over western North America, where a strong ridge of high pressure will develop, and over the Midwestern U.S., where a strong trough of low pressure will form.”

Polar Vortex

As the weather turns, commentators say we may see meteorologists bickering over whether to label the phenomenon as a “polar vortex.” For their part, several National Weather Service offices are using the term “Polar Vortex,” but that likely won’t settle the debate.