Again, a completely contradictory message to the polar vortex with an emphasis on blocking in the North Atlantic.
I've been doing this long enough now to realise that the GWO composites are pretty powerful tools, so something's got to give here.
Probably the best compromise woud be for the first week or so of January to feature a prevelant but weakening +AO. Thereafter, I think a strong enough signal for a transition week 2 (ish) to a much more blocked pattern in the North Atlantic.
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http://forum.netweather.tv/topic/58354-in-depth-technical-model-discussion/page__st__1260__p__2194832#entry2194832
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