The ECMWF is bringing back the idea of a December 9-12 snow system, but this time in the 9-11 timeframe. Below is a comparison of the 12z ECMWF December 1st model run and today's 12z ECMWF model run.
Check out just how similar the model runs are with placement of the storm. There are some differences though, including storm strength and the amount of cold air available. Today's 12z ECMWF indicates much colder air will be available, but the storm will be weaker than what the Dec. 1 ECMWF model run showed. For those who are wondering, the GFS is not showing this prospect. But since the ECMWF has brought this idea back, I believe it warrants close monitoring, as trends like this ought to be closely followed.
|December 1st ECMWF Model Run, Valid December 11|
|December 3rd ECMWF Model Run, Valid December 10|