Just starting to get hints of retrogression and a northerly plunge at the end of thn run T+384 on the 12z run. The ensemble charts @ T+384 show quite a number with a similar theme. With such a lack of any sort of cold plunge this autumn, I often think something may hit after the solstice. No real cold in November this year and December is following suit. Nothing scientific here, but I will be watching this one seesaw over the coming weeks.

Although a complete lack of stratwarm...

http://acdb-ext.gsfc.nasa.gov/Data_s...2013_merra.pdf

Keith (Southend)
http://www.southendweather.net
"Weather Home & Abroad"