It's part of a large cyclonic gyre associated with Epsilon. It still has some extratropical/subtropical features associated with it -- well, largely in its environment -- thus the pattern that you are seeing.
Of note, the trough that is forecast to capture Epsilon and accelerate it toward the east is projected to be of negative tilt -- meaning that it tilts back toward the west with increasing latitude -- as it slides over the Canadian Maritime region in a few days. I wouldn't be surprised to see Epsilon slide a bit further north (of east) or move a bit slower than forecast if that evolution holds. I'm discounting some model runs that have been taking it NW into the Canadian Maritimes on the east side of that trough, but wouldn't be surprised to see it move a tick further north than expected down the line. Largely, the impacts of such a track would only be to shipping interests.
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