That is one heck of a contrast with the Autumnal SSTs.
By Paul Homewood
The succession of storms passing our way in the last few weeks has had a noticeable effect on sea surface temperatures. Below is the current position, showing a huge pool of very cold water throughout much of the North Atlantic.
If we contrast with the maps at the end of October & November, we can see just how much this cold pool has grown.
It is this expanding pool of cold water which has been responsible for the jet stream moving much further south.
Below is the jet stream forecast for tomorrow, as Storm Frank passes through. Notice how far south the jet stream is forced, before turning sharply north.
The Netweather forecast suggests that the jet stream will become much more zonal after Frank moves off. Below is the forecast for 8th January, which is reasonably typical for the next couple of weeks, and…
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