A blast or two of cold air is looking likely by the second half of the month.
The jet stream will be very active, which could mean precipitation - and snow?
The Stratosphere is warming, called a Sudden Stratosphere Warming, or SSM.
This basically makes the cold air push down our way.
Below is the progression of cold air aloft between Jan 15 and Jan 20, approximately.
The dates aren't exact, but cold air is likely to affect us during the second half of the month.
Blue is the cold air.
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