Monday was the coldest day of the week in the Upper Midwest and Great Lakes with temperatures increasing after that.
In the East Tuesday will be the coldest day before a similar rise in temperatures.
On Tuesday, temperatures will reach a high of -5C degrees in New York and -11C degrees in Boston.
However, this will be the coldest highest temperatures experienced since 2019.
Bitterly cold air is currently flowing over the largely ice free Great Lakes.
This means there is a very high chance of very heavy lake effect snow throughout Tuesday.
On Monday morning, five million people were lake effect snow alerts across the Great Lakes.
At sunrise there was a “mega” lake effect snow band.
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Some areas could also receive thundersnow.