Will the real cold air arrive?

Several times now, Arctic air has made a move to attack the northeast US, but we haven’t gotten really cold yet.
Tonight (Thursday night), a storm passes to our south, brushing us with a dusting of snow. We get a similar ‘brush-off’ with a possible dusting of snow on Monday night into Tuesday.
Each storm pulls more cold air down from the cold pool in Canada, so we get a below-freezing day on Friday, with a warm up on Saturday and Sunday, followed by the probibility of below freezing temperatures Tuesday through Thursday next week.
Here’s the forecast map for air temperature (in color- blue is cold) and winds (black lines) for 850mb (1 mile up in the atmosphere) for Tuesday.

tuesday afternoon's upper air temperatures (blue is cold)

tuesday afternoon’s upper air temperatures (blue is cold)

Here’s the very extended map for Friday, with more blue (cold) lining up in our direction.

Friday's forecast map for temperatures aloft - blue is cold - more cold coming?

Friday’s forecast map for temperatures aloft – blue is cold – more cold coming?

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