December Arrives with King Cold Calling Card!

(Monday, November 24, 2008) – West Tennesseeans best prepare for December cold that will rival December 2000 before Auld Lang Syne is sung.  The Arctic Oscillation Ensembles and North Atlantic Oscillation Ensembles are tanking and the European model is catching on and eventually the GFS will. 

European Model Valid 12z Sunday 11/30/08

The first surge will be Sunday, last day of November.  The first graphic shows the approaching trough that will drive the arctic cold into the region later in the day.

 

 

 

 

 

 

The trough continues to deepen as evidenced by the graphic below which is valid 12z Monday, 12/1/08.

500mb / Sfc Pressure-Thickness Panels Valid 12z Monday 12/1/08

Click to enlarge the panels above but notice how the 540dm thickness line is in the Deep South and with the prospect of the next short wave dropping down into the trough it will serve to keep it in place for some extra days.  Finally looking at the moisture panels suggest that the arctic air will bring at least the prospects for some snow showers the first week of December:

Ecmwf 850mb Moisture-Temperature Valid 12z Monday

I’m ready to get excited!  Comments welcomed and encouraged!!!