Mid January thaw a transient interruption in the pattern
The pattern over recent weeks has proven to be an interesting one across the majority of the United States, as the record cold temperatures and plentiful snow has visited folks from the Mid-west, Great Lakes, and the Northeast. Our significant snowstorm last week was due in large part to the negative EPO / positive PNA regime in concert with a well-timed Greenland block, allowing short wave amplification to occur on the mid atlantic coast. Since that time, the Greenland block has dissipated, and the western ridge will collapse in a few days, not before a near record / record cold airmass arrives Monday night.
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