PORT WASHINGTON, NY

Tuesday, January 5, 2021

Some tweets on what we should expect mid Jan

This is an upper air pattern you want to see in mid-January if you're a snow lover in the central and eastern US.
Clearly the GFS reads the AO blog because latest GFS is predicting, exactly two weeks after a major #polarvortex disruption, an amplified western ridge/eastern trough with a sharp turn to colder & snowier weather in Eastern US. Models struggle post PV disruption so far from given


1/ This thread is about the 2020 winter and upcoming SSW through the analog perspective. First, we should see how we got here and compare with years since 1950. December NH 500mb view in Reanalysis so far has the obvious Aleutian Low and Urals/Barents High (known to disturb PV).

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