Arctic blast forecast to break dozens of low temperature records in Eastern U.S. this weekend

The Arctic blast sweeping across the Great Lakes and the East Coast on Friday could lead to a remarkably widespread swath of record low temperatures on Saturday morning. 
The air mass that will be entrenched over the East Coast, particularly New England and the Mid-Atlantic states, is coming straight from northern Canada, and longstanding records appear poised to tumble. 
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For example, in New Yor