Nick Gardner wrote:

Retrogression has been a consistent theme now in the models for past 24
hours allowing a cyclonic very cold northerly (originating where sea
anomalies are negative)

Will,

Where in the eastern half of North Atlantic are the SST's anomaly
negative?

I've just looked at:


https://www.fnmoc.navy.mil/ncoda_web...lobal_anom.gif

And it seems to my untrained eye that the whole of the eastern North
Atlantic has a +ve temperature anomaly. More interestingly, apart from the
tropical Pacific areas and smaller areas here and there, most of the rest
of the world seems to have a +ve SST anomaly.

There's a patch in the Jan Mayen area but it's not big enough to make much
difference, particularly given the warm anomalies to the south of it, plus
lower than average amounts of ice.

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"What use is happiness? It can't buy you money." [Chic Murray, 1919-85]